taxonID	type	description	language	source
03819A4F6E1C7719FF7DF8FDFF342A4A.taxon	materials_examined	TYPE: — JAPAN. Tokyo Metropolis: Ogasawara Islands, Hahajima Island, Sekimon, 26 ° 40 ' 59.7 " N, 142 ° 09 ' 43.0 " E, elev. 248 m, 18 July 2023, Kayo Hayama (holotype: MAK 472470!, isotypes: MAK 472470! and TI 00265245!).	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1C7719FF7DF8FDFF342A4A.taxon	diagnosis	Diagnosis: — Callicarpa boninensis is morphologically most similar to C. subpubescens, but can be distinguished by its persistent stellate hairs on mature leaves and longer petioles. A comparative summary of C. subpubescens, C. boninensis, C. hahajimensis, and C. × chibusensis is presented in Figure 4 and Table 1.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1C7719FF7DF8FDFF342A4A.taxon	description	Semi-evergreen trees, erect, 3 – 11 m tall; shorter on limestone substrates. Branches terete, with elliptic lenticels and raised leaf scars, densely covered with yellowish-brown soft stellate tomentum when young, later glabrescent. Leaves decussate-opposite, chartaceous, 0.1 mm thick; petiole 2 – 6 cm long, stellate-pubescent; blade elliptic, oblong, or ovate, 7 – 16 cm long, 4 – 8 cm wide; apex acute or acuminate, base obtuse, shortly attenuated into the petiole; margins serrulate in upper half or subentire. Upper surface stellate-pubescent (average density: 13 hairs / mm 2); lower surface densely stellate-pubescent (average density: 16 hairs / mm 2), with a raised midrib and 7 – 8 pairs of obscure lateral veins. Flowers from July to December, peaking in October. Inflorescences in axillary, dichasial cymes, densely many-flowered, 3 – 4.5 cm long, 2 – 3.5 cm wide. Peduncle 1.5 – 2 cm long; rachis 1 – 2 cm long; both densely stellate-tomentose. Pedicel ca. 1 mm long, glandular hairs. Bracts narrowly ovate, ca. 2 mm long, apex obtuse. Calyx cup-shaped, ca. 1.5 mm long, glandular hairs; shallowly four-lobed, lobes widely deltate, obtuse, ca. 0.5 mm long. Corolla funnel-shaped, pale purple, ca. 5 mm long, sparsely covered with sessile glands on the outer surface; tube ca. 3 mm long, ca. 1 mm in diameter at the throat; four-lobed, lobes orbicular, ca. 2 mm long. Heterostylous, functionally dioecious. Male flowers: Four stamens, ca. 5 mm exserted from corolla; filament ca. 7 mm long; anther ellipsoid, ca. 1 mm long, glandular-punctate, longitudinally dehiscent throughout. Style filiform, 0.5 – 1.5 mm long; stigma capitate. Female flowers: Four stamens, ca. 5 mm exserted from corolla; filament ca. 7 mm long; anther ellipsoid, ca. 1 mm long, glandular-punctate, longitudinally dehiscent throughout. Style filiform, ca. 7 mm long; stigma capitate. Fruit a drupe, globose, purple, ca. 3 mm in diameter, with four 1 - seeded pyrenes.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1C7719FF7DF8FDFF342A4A.taxon	materials_examined	Additional specimens examined (paratype): — JAPAN. Tokyo Metropolis: Ogasawara Islands, Hahajima Island: Sekimon, 26 ° 40 ' 39.2 " N, 142 ° 09 ' 26.8 " E, 24 June 2006, Keigo Mori (MAK 472402!); loc. cit., 26 ° 40 ' 39.5 " N, 142 ° 09 ' 27.4 " E, 4 October 2006, K. Mori (MAK 472427!); loc. cit., 26 ° 40 ' 44.4 " N, 142 ° 09 ' 31.7 " E, 4 October 2006, K. Mori (MAK 472428!, MAK 472429!, MAK 472430!, MAK 472431! and MAK 472432!); loc. cit., 26 ° 40 ' 44.9 " N, 142 ° 09 ' 32.2 " E, 4 October 2006, K. Mori (MAK 472433!, MAK 472434!, MAK 472435!, MAK 472436! and MAK 472437!); loc. cit., 26 ° 41 ' 04.6 " N, 142 ° 09 ' 38.6 " E, 5 October 2006, K. Mori (MAK 472412!); loc. cit., 26 ° 41 ' 05.9 " N, 142 ° 09 ' 38.4 " E, 5 October 2006, K. Mori (MAK 472413!); loc. cit., 26 ° 41 ' 05.3 " N, 142 ° 09 ' 39.8 " E, 5 October 2006, K. Mori (MAK 472414!); loc. cit., 26 ° 41 ' 05.0 " N, 142 ° 09 ' 39.9 " E, 5 October 2006, K. Mori (MAK 472415!); loc. cit., 26 ° 41 ' 03.5 " N, 142 ° 09 ' 39.8 " E, 5 October 2006, K. Mori (MAK 472416!); loc. cit., 26 ° 41 ' 03.2 " N, 142 ° 09 ' 40.1 " E, 5 October 2006, K. Mori (MAK 472418!, MAK 472419!, MAK 472421!, MAK 472422!, MAK 472423! and MAK 472424!); loc. cit., 26 ° 41 ' 02.9 " N, 142 ° 09 ' 40.1 " E, 5 October 2006, K. Mori (MAK 472425!); loc. cit., 26 ° 40 ' 21.5 " N, 142 ° 09 ' 21.6 " E, 5 October 2006, K. Mori (MAK 472446!); loc. cit., 26 ° 40 ' 25.1 " N, 142 ° 09 ' 20.5 " E, 5 October 2006, K. Mori (MAK 472447! and MAK 472458!); loc. cit., 26 ° 40 ' 20.1 " N, 142 ° 09 ' 21.0 " E, 18 June 2007, K. Mori (MAK 472366!); loc. cit., 26 ° 40 ' 25.1 " N, 142 ° 09 ' 20.5 " E, 18 June 2007, K. Mori (MAK 472367!); loc. cit., 26 ° 40 ' 52.5 " N, 142 ° 09 ' 35.0 " E, 18 June 2007, K. Mori (MAK 464596! and MAK 472467!); loc. cit., 17 March 1972, Yasuichi Momiyama et al. (MAK 125161!); loc. cit., 26 ° 40 ' 24.9 " N, 142 ° 09 ' 20.2 " E, 29 June 2024, Shota Sakaguchi et al. (KYO 00029254! and KYO 00029255!); loc. cit., 26 ° 40 ' 45.5 " N, 142 ° 09 ' 34.1 " E, 29 June 2024, S. Sakaguchi et al. (KYO 00029258! and KYO 00029259!); Mt. Chibusa, 26 ° 39 ' 27.6 " N, 142 ° 09 ' 45.9 " E, 6 October 2006, K. Mori (MAK 472275!); loc. cit., 26 ° 39 ' 23.8 " N, 142 ° 09 ' 52.7 " E, 6 October 2006, K. Mori (MAK 472277!); loc. cit., 26 ° 39 ' 24.6 " N, 142 ° 09 ' 51.7 " E, 6 October 2006, K. Mori (MAK 464585!); loc. cit., 26 ° 39 ' 23.8 " N, 142 ° 09 ' 52.6 " E, June 2014, Satoshi Narita and Hidetoshi Kato (MAK 472496!). Anejima Island: 24 August 1980, Mikio Ono et al. (MAK 184059!); loc. cit., 18 July 1992, Takaya Yasui (MAK 268398!).	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1C7719FF7DF8FDFF342A4A.taxon	distribution	Distribution: — Japan. Tokyo Metropolis: Ogasawara Islands, Hahajima and Anejima Islands.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1C7719FF7DF8FDFF342A4A.taxon	biology_ecology	Habitat: — Mesic forests in the Hahajima Islands, dominated by Elaeocarpus photiniifolia Hook. et Arn., Pisonia umbellifera (J. R. et G. Forst.) Seem., Ardisia sieboldii Miq., and Bischofia javanica Blume, at elevations of 210 – 430 m.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1C7719FF7DF8FDFF342A4A.taxon	etymology	Etymology: — The specific epithet boninensis refers not only to its type locality — the Bonin (Ogasawara) Islands — but also to the fact that, according to population demographic analysis (Setsuko et al. 2024 b), this species represents an older lineage compared to the other Callicarpa taxa in the Ogasawara Islands.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1C7719FF7DF8FDFF342A4A.taxon	vernacular_names	Japanese name: — Ogasawara-murasaki	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1C7719FF7DF8FDFF342A4A.taxon	conservation	Conservation status: — This species is currently known only from Hahajima Island, which has a total area of approximately 20 km 2. The mesic forests on Hahajima Island have been invaded by the alien species, Bischofia javanica, since the late 20 th century, likely contributing to the decline of C. boninensis populations. Genetically similar populations belonging to the same genetic cluster or clade have been identified in the Mukojima and Volcano Islands (Setsuko et al. 2024 b, Sugai et al. 2019); however, their morphological characteristics and flowering phenology remain insufficiently understood, preventing definitive species identification. Two specimens (MAK 184059 and MAK 268398) collected in 1980 and 1992 from Anejima Island were deposited in MAK, but its current growth status is unknown. Consequently, we assign its conservation status as Vulnerable (VU) under the IUCN Red List criteria (IUCN 2012), specifically under criteria D 1 — indicating fewer than 1,000 mature individuals capable of flowering — and D 2 — indicating an area of occupancy of less than 20 km 2, corresponding to its known distribution range on Hahajima Island.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E19771BFF7DFE46FF112BFE.taxon	materials_examined	TYPE: — JAPAN. Tokyo Metropolis: Ogasawara Islands, Hahajima Island, Mt. Kensaki, 26 ° 38 ' 47.5 " N, 142 ° 09 ' 57.7 " E, elev. 206 m, 18 July 2023, K. Hayama (holotype: MAK 472471!, isotypes: MAK 472471! and TI 00265246!).	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E19771BFF7DFE46FF112BFE.taxon	diagnosis	Diagnosis: — Callicarpa hahajimensis is morphologically most similar to C. parvifolia but can be distinguished by its lower density of stellate hairs on both leaf surfaces and thinner leaves. A comparative summary of C. subpubescens, C. boninensis, C. hahajimensis, and C. × chibusensis is presented in Figure 4 and Table 1.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E19771BFF7DFE46FF112BFE.taxon	description	Evergreen shrubs, 0.3 – 2 m tall, often caespitose. Branches terete, with elliptic lenticels and raised leaf scars, densely covered with yellowish-brown soft stellate tomentum when young, later glabrescent. Leaves decussate-opposite, thickly chartaceous, 0.3 mm thick; petiole 0.5 – 4 cm long, stellate-pubescent; blade elliptic, broadly elliptic, or ovate, 2 – 11 cm long, 2 – 5 cm wide; apex acute, base obtuse, shortly attenuated into the petiole; margins serrulate in upper half, upper surface sparsely stellate-pubescent (average density: 8 hairs / mm 2); lower surface stellate-pubescent (average density: 9 hairs / mm 2), with a raised midrib and 5 – 8 pairs of obscure lateral veins. Flowers from July to January, peaking in August and November. Inflorescences in axillary, dichasial cymes, densely many-flowered, 3 – 4 cm long, 2 – 3.5 cm wide. Peduncle 1.5 – 2 cm long; rachis 1 – 2 cm long; both densely stellate-tomentose. Pedicel ca. 1 mm long, glandular hairs. Bracts narrowly ovate, ca. 2 mm long, apex obtuse. Calyx cup-shaped, ca. 1.5 mm long, glandular hairs; shallowly four-lobed, lobes widely deltate, obtuse, ca. 0.5 mm long. Corolla funnel-shaped, pale purple, ca. 5 mm long, sparsely covered with sessile glands on the outer surface; tube ca. 3 mm long, ca. 1 mm in diameter at the throat; four-lobed, lobes orbicular, ca. 2 mm long. Heterostylous, functionally dioecious. Male flowers: Four stamens, ca. 5 mm exserted from corolla; filament ca. 7 mm long, anther ellipsoid, ca. 1 mm long, glandular-punctate, longitudinally dehiscent throughout. Style filiform, ca. 0.5 mm long; stigma capitate. Female flowers: Four stamens, ca. 5 mm exserted from corolla; filament ca. 7 mm long, anther ellipsoid, ca. 1 mm long, glandular-punctate, longitudinally dehiscent throughout. Style filiform, ca. 7 mm long; stigma capitate. Fruit a drupe, globose, purple or white, ca. 3 mm in diameter, with four 1 - seeded pyrenes.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E19771BFF7DFE46FF112BFE.taxon	materials_examined	Additional specimens examined (paratype): — JAPAN. Tokyo Metropolis: Ogasawara Islands, Hahajima Island: Mt. Kensaki, 26 ° 38 ' 43.4 " N, 142 ° 09 ' 55.6 " E, 11 November 2006, H. Kato (MAK 472459! and MAK 472460!); loc. cit., 26 ° 38 ' 45.1 " N, 142 ° 09 ' 56.7 " E, 11 November 2006, H. Kato (MAK 472461!); loc. cit., 26 ° 38 ' 45.8 " N, 142 ° 09 ' 56.3 " E, 11 November 2006, H. Kato (MAK 472462! and MAK 472463!); loc. cit., 26 ° 38 ' 45.9 " N, 142 ° 09 ' 56.4 " E, 11 November 2006, H. Kato (MAK 472464!); loc. cit., 26 ° 38 ' 43.4 " N, 142 ° 09 ' 55.6 " E, 17 June 2007, K. Mori (MAK 464593!); loc. cit., 26 ° 38 ' 44.4 " N, 142 ° 09 ' 56.1 " E, 17 June 2007, K. Mori (MAK 464594!); loc. cit., 26 ° 38 ' 45.1 " N, 142 ° 09 ' 56.7 " E, 17 June 2007, K. Mori (MAK 472317! and MAK 472318!); loc. cit., 26 ° 38 ' 45.4 " N, 142 ° 09 ' 56.8 " E, 17 June 2007, K. Mori (MAK 472319!); loc. cit., 26 ° 38 ' 45.5 " N, 142 ° 09 ' 56.9 " E, 17 June 2007, K. Mori (MAK 472320! and MAK 472321!); loc. cit., 26 ° 38 ' 45.8 " N, 142 ° 09 ' 56.9 " E, 17 June 2007, K. Mori (MAK 472322! and MAK 472323!); loc. cit., 26 ° 38 ' 44.5 " N, 142 ° 09 ' 56.2 " E, 17 June 2007, K. Mori (MAK 472324! and MAK 472325!); loc. cit., 26 ° 38 ' 44.5 " N, 142 ° 09 ' 56.2 " E, 17 June 2007, K. Mori (MAK 472326!); loc. cit., 26 ° 38 ' 44.4 " N, 142 ° 09 ' 56.0 " E, 17 June 2007, K. Mori (MAK 472327!); loc. cit., 26 ° 38 ' 44.5 " N, 142 ° 09 ' 56.0 " E, 17 June 2007, K. Mori (MAK 472328!); loc. cit., 26 ° 38 ' 44.6 " N, 142 ° 09 ' 55.9 " E, 17 June 2007, K. Mori (MAK 472329!, MAK 472330! and MAK 472331!); loc. cit., 26 ° 38 ' 44.5 " N, 142 ° 09 ' 56.0 " E, 17 June 2007, K. Mori (MAK 472332!); loc. cit., 26 ° 38 ' 45.3 " N, 142 ° 09 ' 56.9 " E, June 2014, S. Narita and H. Kato (MAK 472476!); loc. cit., 26 ° 38 ' 44.6 " N, 142 ° 09 ' 56.2 " E, June 2014, S. Narita and H. Kato (MAK 472477!); loc. cit., 26 ° 38 ' 44.7 " N, 142 ° 09 ' 56.0 " E, June 2014, S. Narita and H. Kato (MAK 472478!); Mt. Kensaki-Mt. Chibusa, 13 March 1988, Motomi Ito et al. (MAK 299166!); Minamizaki, 26 ° 37 ' 23.3 " N, 142 ° 10 ' 37.6 " E, 15 September 2023, K. Hayama (MAK 472474!); Mt. Higashi, 26 ° 41 ' 54.2 " N, 142 ° 08 ' 53.1 " E, 15 September 2023, K. Hayama (MAK 472475!). Imoutojima Island: 26 ° 33 ' 35.6 " N, 142 ° 12 ' 39.5 " E, 23 June 2006, K. Mori and H. Kato (MAK 464583!, MAK 464584!, MAK 472301!, MAK 472302!, MAK 472303!, MAK 472304!, MAK 472305!, MAK 472306!, MAK 472307! and MAK 472308!); loc. cit., 26 ° 33 ' 35.2 " N, 142 ° 12 ' 39.2 " E, 15 June 2014, Suzuki Setsuko and H. Kato (MAK 472480!); loc. cit., 26 ° 33 ' 35.7 " N, 142 ° 12 ' 39.5 " E, 15 June 2014, S. Setsuko and H. Kato (MAK 472481!); loc. cit., 26 ° 33 ' 35.9 " N, 142 ° 12 ' 39.5 " E, 15 June 2014, S. Setsuko and H. Kato (MAK 472482!); loc. cit., 26 ° 33 ' 35.3 " N, 142 ° 12 ' 39.5 " E, 15 June 2014, S. Setsuko and H. Kato (MAK 472483!); loc. cit., 26 ° 33 ' 33.5 " N, 142 ° 12 ' 34.5 " E, 15 June 2014, S. Setsuko and H. Kato (MAK 472484!); loc. cit., 26 ° 33 ' 36.0 " N, 142 ° 12 ' 39.5 " E, 15 June 2014, S. Setsuko and H. Kato (MAK 472485!); loc. cit., 24 August 1980, M. Ono et al. (MAK 183983!). Meijima Island: 24 August 1980, M. Ono et al. (MAK 184005!).	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E19771BFF7DFE46FF112BFE.taxon	distribution	Distribution: — Japan. Tokyo Metropolis: Ogasawara Islands, Hahajima, Imoutojima, and Meijima Islands.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E19771BFF7DFE46FF112BFE.taxon	biology_ecology	Habitat: — Dry scrubs in the Hahajima Islands, with forests dominated by Rhaphiolepis indica (L.) Lindl. var. umbellata (Thunb.) H. Ohashi, Planchonella obovata (R. Br.) Pierre, Syzygium cleyerifolium (Yatabe) Makino, and Pandanus boninensis Warb., at elevations of 100 – 280 m.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E19771BFF7DFE46FF112BFE.taxon	etymology	Etymology: — The specific epithet hahajimensis refers to its type locality: Hahajima Island.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E19771BFF7DFE46FF112BFE.taxon	vernacular_names	Japanese name: — Hahajima-murasaki.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E19771BFF7DFE46FF112BFE.taxon	conservation	Conservation status: — Dry scrubs in the Hahajima Islands have a limited local distribution (Shimizu 2008). On Hahajima Island, these habitats are under pressure from alien species such as Leucaena leucocephala (Lam.) de Wit, Kalanchoe pinnata (Lam.) Pers., and Bidens pilosa L. var. radiata Sch. Bip., and have also been invaded by Bischofia javanica. In contrast, the satellite islands of Hahajima Island show little evidence of impact from alien species. The total area of dry scrub habitats across the Hahajima Islands, including its satellite islands, is estimated to be less than 10 km 2. Consequently, we assign its conservation status as Endangered (EN) under the IUCN Red List criteria (IUCN 2012), specifically under criterion D, indicating that the number of mature individuals capable of flowering is fewer than 250.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1B771AFF7DFED3FE182D4B.taxon	materials_examined	TYPE: — JAPAN. Tokyo Metropolis: Ogasawara Islands, Hahajima Island, Mt. Chibusa, 26 ° 39 ' 29.1 " N, 142 ° 09 ' 44.5 " E, elev. 413 m, 30 April 2023, S. Setsuko and K. Hayama (holotype: MAK 472472!, isotypes: MAK 472472! and TI 00265244!).	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1B771AFF7DFED3FE182D4B.taxon	diagnosis	Diagnosis: — Callicarpa × chibusensis is considered a natural hybrid between C. subpubescens and C. boninensis (see Notes for details). It is morphologically similar to both parental species, but can be distinguished by its intermediate density of stellate hairs on both leaf surfaces — higher than in C. subpubescens and lower than in C. boninensis — as well as by its smaller leaves compared to C. subpubescens. It also exhibits an earlier flowering phenology compared to C. boninensis. A comparative summary of C. subpubescens, C. boninensis, C. hahajimensis, and C. × chibusensis is presented in Figure 4 and Table 1.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1B771AFF7DFED3FE182D4B.taxon	description	Semi-evergreen shrubs, erect, 2 – 5 m tall. Branches terete, with elliptic lenticels and raised leaf scars, densely covered with yellowish-brown soft stellate tomentum when young, later glabrescent. Leaves decussate-opposite, thickly chartaceous, 0.2 mm thick; petiole 2 – 4 cm long, stellate-pubescent; blade elliptic, oblong, broadly elliptic, or ovate, 8 – 13 cm long, 4 – 9 cm wide; apex acute or acuminate, base obtuse, shortly attenuated into the petiole; margins serrulate in upper half, upper surface glabrescent except for sparsely stellate-pubescent on midrib and lateral veins (average density: 4 hairs / mm 2, ca. 40 % glabrous); lower surface sparsely stellate-pubescent (average density: 3 hairs / mm 2), with a raised midrib and 5 – 7 pairs of obscure lateral veins. Flowers from June to August, peaking in July. Inflorescences in axillary, dichasial cymes, densely many-flowered, 3 – 5.5 cm long, 2.5 – 4 cm wide. Peduncle 1.5 – 2 cm long; rachis 1 – 2 cm long, both densely stellate-tomentose. Pedicel ca. 1 mm long, glandular hairs. Bracts narrowly ovate, ca. 2 mm long, apex obtuse. Calyx cup-shaped, ca. 1.5 mm long, glandular hairs; shallowly four-lobed, lobes widely deltate, obtuse, ca. 0.5 mm long. Corolla funnel-shaped, pale purple, ca. 5 mm long, sparsely covered with sessile glands on the outer surface; tube ca. 3 mm long, ca. 1 mm in diameter at the throat; four-lobed, lobes orbicular, ca. 2 mm long. Heterostylous, functionally dioecious. Male flowers: Four stamens, ca. 5 mm exserted from corolla; filament ca. 7 mm long, anther ellipsoid, ca. 1 mm long, glandular-punctate, longitudinally dehiscent throughout. Style filiform, 0.5 – 1 mm long; stigma capitate. Female flowers: Four stamens, ca. 5 mm exserted from corolla; filament ca. 7 mm long, anther ellipsoid, ca. 1 mm long, glandular-punctate, longitudinally dehiscent throughout. Style filiform, ca. 7 mm long; stigma capitate. Fruit a drupe, globose, purple, ca. 3 mm in diameter, with four 1 - seeded pyrenes.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1B771AFF7DFED3FE182D4B.taxon	materials_examined	Additional specimens examined (paratype): — JAPAN. Tokyo Metropolis: Ogasawara Islands, Hahajima Island: Mt. Chibusa, 26 ° 39 ' 33.4 " N, 142 ° 09 ' 39.9 " E, 22 June 2006, K. Mori (MAK 472398!); loc. cit., 26 ° 39 ' 31.8 " N, 142 ° 09 ' 42.2 " E, 6 October 2006, K. Mori (MAK 464586!); loc. cit., 26 ° 39 ' 32.2 " N, 142 ° 09 ' 37.5 " E, 6 October 2006, K. Mori (MAK 472257!); loc. cit., 26 ° 39 ' 33.4 " N, 142 ° 09 ' 39.9 " E, 6 October 2006, K. Mori (MAK 472258!); loc. cit., 26 ° 39 ' 31.7 " N, 142 ° 09 ' 42.5 " E, 6 October 2006, K. Mori (MAK 472259!); loc. cit., 26 ° 39 ' 31.4 " N, 142 ° 09 ' 42.4 " E, 6 October 2006, K. Mori (MAK 472260!); loc. cit., 26 ° 39 ' 27.9 " N, 142 ° 09 ' 46.0 " E, 6 October 2006, K. Mori (MAK 472261!); loc. cit., 26 ° 39 ' 27.2 " N, 142 ° 09 ' 46.0 " E, 6 October 2006, K. Mori (MAK 472262!); loc. cit., 26 ° 39 ' 25.1 " N, 142 ° 09 ' 51.4 " E, 6 October 2006, K. Mori (MAK 472263!); loc. cit., 26 ° 39 ' 24.1 " N, 142 ° 09 ' 52.1 " E, 6 October 2006, K. Mori (MAK 472264!); loc. cit., 26 ° 39 ' 22.4 " N, 142 ° 09 ' 53.8 " E, 6 October 2006, K. Mori (MAK 472265!); loc. cit., 26 ° 39 ' 33.1 " N, 142 ° 09 ' 38.6 " E, 6 October 2006, K. Mori (MAK 472266!); loc. cit., 26 ° 39 ' 33.1 " N, 142 ° 09 ' 39.0 " E, 6 October 2006, K. Mori (MAK 472267! and MAK 472268!); loc. cit., 26 ° 39 ' 33.5 " N, 142 ° 09 ' 39.4 " E, 6 October 2006, K. Mori (MAK 472269!); loc. cit., 26 ° 39 ' 31.7 " N, 142 ° 09 ' 42.5 " E, 6 October 2006, K. Mori (MAK 472270!); loc. cit., 26 ° 39 ' 31.4 " N, 142 ° 09 ' 42.4 " E, 6 October 2006, K. Mori (MAK 472271!); loc. cit., 26 ° 39 ' 29.1 " N, 142 ° 09 ' 44.0 " E, 6 October 2006, K. Mori (MAK 472272!); loc. cit., 26 ° 39 ' 25.7 " N, 142 ° 09 ' 49.9 " E, 6 October 2006, K. Mori (MAK 472276!); loc. cit., 19 November 1970, M. Ono and Sumiko Kobayashi (MAK 123833!); loc. cit., 29 – 30 June 1975, S. Kobayashi (MAK 138410! and MAK 138409!); loc. cit., 19 June 1979, S. Kobayashi and Yuji Ohmori (MAK 180608! and MAK 180609!); loc. cit., 19 November 1997, Jin Murata et al. (MAK 293812!); loc. cit., 13 December 1998, Tetsuo Ohi (MAK 306701!); loc. cit., 28 April 2001, H. Kato (MAK 319233!); loc. cit., 26 ° 39 ' 21.6 " N, 142 ° 09 ' 50.4 " E, 30 June 2024, S. Sakaguchi et al. (KYO 00029260!, KYO 00029261!, KYO 00029262!, KYO 00029263! and KYO 00029264!); Mt. Chibusa-Sakaigatake, 25 March 1971, M. Ono and S. Kobayashi (MAK 124956! and MAK 124957!).	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1B771AFF7DFED3FE182D4B.taxon	distribution	Distribution: — Japan. Tokyo Metropolis: Ogasawara Islands, Hahajima Island.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1B771AFF7DFED3FE182D4B.taxon	biology_ecology	Habitat: — Mesic scrubs and the edge of mesic forests (cloud forests) on the main ridge at> 350 m elevation on Hahajima Island. The forests are dominated by Freycinetia formosana Hemsl. var. boninensis Nakai, Dendrocacalia crepidifolia (Nakai) Nakai, Fatsia oligocarpella Koidz., and Melastoma tetramerum Hayata var. pentapetalum Toyoda, at elevations of 320 – 460 m.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1B771AFF7DFED3FE182D4B.taxon	etymology	Etymology: — The specific epithet chibusensis refers to its type locality: Mt. Chibusa.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1B771AFF7DFED3FE182D4B.taxon	vernacular_names	Japanese name: — Chibusa-shima-murasaki	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1B771AFF7DFED3FE182D4B.taxon	conservation	Conservation status: — As a natural hybrid, this species occupies slightly different environments compared to its parent species and is exclusively found in cloud forests at higher elevations on Hahajima Island. Although the population size is not small, it is likely declining due to encroachment of the alien species Bischofia javanica. Therefore, we assign its conservation status as Vulnerable (VU) under the IUCN Red List criteria (IUCN 2012), specifically under criteria D 1 — indicating fewer than 1,000 mature individuals capable of flowering — and D 2 — indicating an area of occupancy of less than 20 km 2, corresponding to its known distribution range on Hahajima Island.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
03819A4F6E1B771AFF7DFED3FE182D4B.taxon	discussion	Notes: — The recognition of C. × chibusensis as a natural hybrid is supported by both genetic and morphological evidence. This taxon is referred to as ecotype M in Setsuko et al. (2024 a) and as ecotype SH in Setsuko et al. (2024 b). Population genetic analyses using SSR markers and RAD-seq data revealed that this taxon exhibits an admixed genetic pattern intermediate between C. subpubescens (ecotype G in Setsuko et al. (2024 a) and ecotype SG in Setsuko et al. (2024 b )) and C. boninensis (ecotype T in Setsuko et al. (2024 a) and ecotype ST in Setsuko et al. (2024 b )). STRUCTURE analysis (Setsuko et al. 2024 a) and ADMIXTURE analysis (Setsuko et al. 2024 b) both showed admixture between the two parental clusters, and neighbor-net network analysis (Setsuko et al. 2024 b) also placed C. × chibusensis (ecotype SH) between its parental species (ecotypes SG and ST). Morphologically, C. × chibusensis displays leaf traits and hair densities intermediate between those of the parental species, as confirmed by principal component analysis (Setsuko et al. 2024 a). Furthermore, C. × chibusensis occupies a unique ecological niche in high-elevation cloud forests and exhibits a flowering phenology similar to C. subpubescens but distinct from C. boninensis (Setsuko et al. 2024 a). Collectively, these findings strongly support the interpretation that C. × chibusensis is a natural hybrid between C. subpubescens and C. boninensis.	en	Sugai, Kyoko, Setsuko, Suzuki, Hayama, Kayo, Kato, Hidetoshi (2025): New Callicarpa (Lamiaceae) taxa: Two species and a natural hybrid from Hahajima Island, Ogasawara Islands, Japan. Phytotaxa 736 (1): 1-11, DOI: 10.11646/phytotaxa.736.1.1, URL: https://doi.org/10.11646/phytotaxa.736.1.1
