identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
4D2923153A0F5A01AA4362F33F5C1009.text	4D2923153A0F5A01AA4362F33F5C1009.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Nautilocalyx engelsii Hinoshita & J. L. Clark 2026	<div><p>1. Nautilocalyx engelsii Hinoshita &amp; J. L. Clark sp. nov.</p><p>Figs 3, 4, 5; Table 1</p><p>Type</p><p>BRAZIL – Mato Grosso • Itaúba, Amazônia, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-55.766945&amp;materialsCitation.latitude=-11.141666" title="Search Plazi for locations around (long -55.766945/lat -11.141666)">Floresta Estacional Sempre Verde Aluvia</a>; cultivada até florescer; 11°08’30”S, 55°46’01”W; 317 m; 14 Feb. 2024; M. E. Engels 11405; holotype: UPCB [0077797]; isotype: MBM .</p><p>Diagnosis</p><p>Morphologically similar to Nautilocalyx pallidus by reduced peduncles and nearly sessile flower clusters, pedicels shorter than the calyx, and a white to cream-white corolla, but differentiated by leaves green and suffused with red along the veins and near the margins on both surfaces (vs pale green in N. pallidus), margins entire or with few reduced teeth and ciliate margins (vs serrulate to serrate margins and cilia absent), and white corollas suffused with pale pink outside (vs white corollas with purple dots forming lines and spotting on the corolla lobes).</p><p>Description</p><p>Plants terrestrial, with tubers. Stems erect, 30–60 cm long, succulent, rooting at nodes, terete, pilose, becoming glabrous at maturity, unbranched, green but reddish in the young parts. Leaves opposite, isophyllous; petiole 0.3–1.3 cm long, green to reddish, pilose; blade 3.5–12.7 × 1.8–6.3 cm, elliptic to oblanceolate, immature leaves sparsely pilose, mature leaves nearly glabrous, but pilose along the midveins on both surfaces, green suffused with red along the veins and near the margins on both surfaces, apex acute to obtuse, base acute, margin entire or with few serrations, ciliate. Inflorescence a reduced cyme, appearing sessile, with 4–6 flowers on a reduced peduncle, pedicels 0.7–1.2 cm long, erect, red at the base, green at the apex, pilose; bracts green to green with a red apex, 1.6–1.8 × 0.5–0.7 cm, elliptic to lanceolate. Calyx with subequal lobes, nearly free, dorsal lobe slightly smaller and folded by the corolla nectar chamber, 1.8–2.2 × 1.1–1.2 cm, lanceolate, margin entire, each folded lengthwise by the adjacent lobe, margins ciliate, undulate, green with a red apex, glabrous, pilose near the apex. Corolla uniformly tubular, 3.0–4.8 × 1.1–1.3 cm, oblique relative to calyx, tube almost straight, base enlarged and forming a nectar chamber, longitudinally sulcate, white inside the tube, white suffused with pale pink outside, villous, lobes 6.1–8.9 × 6.6–7.4 mm, rounded, erect, subequal, white, margin entire. Androecium with filaments 2.5–2.8 cm long, included, cream-white, filaments coiling in the female phase, anthers united in pairs. Nectary a bilobed dorsal gland, ca 5 mm long, glabrous, pale yellow. Gynoecium with an ovary 5.4–6 × 3–4 mm, conical, pilose, pale green; style 1.7–2.2 cm long, pale green, pilose, stigma bilobed. Fruit not observed.</p><p>Distribution and habitat</p><p>Nautilocalyx engelsii is endemic to Brazil, currently only known from the state of Mato Grosso, in the municipalities of Itaúba and Nova Canaã do Norte (Fig. 3). This species is found in wet forest and swampy habitats, often associated with rivers and waterfalls.</p><p>Phenology</p><p>Flowering specimens were collected from November to January.</p><p>Etymology</p><p>The epithet honours the collector of the type, the Brazilian botanist Mathias Erich Engels, a taxonomist working mostly on Orchidaceae and a close colleague of the authors.</p><p>Preliminary IUCN conservation assessment</p><p>Endangered: EN B 1 ab (ii, iii) + 2 ab (ii, iii). Only one natural population with a few individuals was originally documented in 2017, whereas subsequent flowering material came from cultivated plants. Since then, no updates on natural populations have been reported. The species occurs in an unprotected area near the construction site of the Colíder Dam and is adjacent to farms. As a result of ongoing construction and agriculture, the area is being rapidly deforested. In addition, the state of Mato Grosso has one of the highest deforestation rates in Brazil (MapBiomas Alerta 2024). In 2023 alone, more than 160,000 ha of native forest were lost in the state (MapBiomas Alerta 2024). This species has an extent of occurrence (EOO) of 154 km 2 and its area of occupancy (AOO) is estimated to be less than 20 km 2. Based on the IUCN Red List Categories and Criteria (IUCN 2024), we provide a preliminary assessment of Endangered.</p><p>Additional material examined</p><p>BRAZIL – Mato Grosso • Itaúba, Floresta Estacional Sempre Verde; cultivada até florescer; 317 m; 10 Jan. 2021; M. E. Engels 8309; MBM • Rio Teles Pires; 321 m; 22 Nov. 2017; M. E. Engels 8491; MBM, RB, HCF, UPCB .</p><p>Taxonomic notes</p><p>Nautilocalyx engelsii is morphologically similar to species in the Nautilocalyx Amazonian clade (Mora and Clark 2016). Among the species in this clade, N. engelsii has diagnostic features such as the leaf margins, which are entire or with few reduced teeth (Fig. 5 B, C), contrasting with the serrate to crenulate margins in other species in this clade. In this species, the leaf lamina is green suffused with red along the veins and near the margins (Fig. 4 E), with the red pigmentation more conspicuous in immature leaves and becoming less evident as the foliage matures. Green leaves suffused with red occur in a few other species in the clade, including N. forgetii (Sprague) Sprague and N. lynchii (Hook. f.) Sprague. In these species, however, the red pigmentation is either restricted primarily to the major veins or extends across the entire abaxial surface.</p><p>Nautilocalyx engelsii is similar to N. pallidus and N. hirsutus . These three species have axillary inflorescences with reduced peduncles that appear sessile, pedicels shorter than the calyx, and a uniformly white to cream-white corolla. The differences between N. engelsii and N. pallidus are provided in the diagnosis and summarized in Table 1. An important diagnostic character that differentiates N. engelsii from N. hirsutus is a pilose midvein on the adaxial leaf surface (vs hirsute in N. hirsutus) and relatively wider calyx lobes ranging from 1.1 to 1.2 cm (vs 0.4–0.9 cm in N. hirsutus).</p><p>While N. pallidus is found in Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela, N. hirsutus has a disjunct distribution with collections in northern Peru and west-central Brazil. Nautilocalyx engelsii has a more restricted distribution and is presumed endemic to the Brazilian state of Mato Grosso (Fig. 3).</p></div>	https://treatment.plazi.org/id/4D2923153A0F5A01AA4362F33F5C1009	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Hinoshita, Lucas Katsumi Rocha;Onofre de Araujo, Andréa;Goldenberg, Renato;Clark, John L.	Hinoshita, Lucas Katsumi Rocha, Onofre de Araujo, Andréa, Goldenberg, Renato, Clark, John L. (2026): Untangling the Nautilocalyx pallidus complex (Gesneriaceae) with description of a new species and a new combination. Plant Ecology and Evolution 159 (3): 563-575, DOI: 10.5091/plecevo.183544
CC60AD7267905DF183382910DA0E9032.text	CC60AD7267905DF183382910DA0E9032.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Nautilocalyx hirsutus (Sprague) Sprague 1912	<div><p>3. Nautilocalyx hirsutus (Sprague) Sprague (Sprague 1912: 89)</p><p>Fig. 6; Table 1</p><p>Alloplectus hirsutus Sprague (Sprague 1911: 346)</p><p>Type</p><p>PERU – s. loc. [specific locality unknown]; originally collected as living material by Louis Forget for F. Sander &amp; Sons, St. Albans, subsequently cultivated at the Royal Botanic Gardens, Kew; 1911; fl.; lectotype (designated here): K [K 000831425]; isolectotype: K [K 000831426].</p><p>Description</p><p>Plants terrestrial, sometimes with tuberous roots. Stem erect, 15–23 cm long, terete, setulose to hirsute, unbranched, green. Leaves opposite, isophyllous; petioles 0.8–2.9 cm long, green to reddish, setulose to hirsute; blade 6.3–14.2 × 2.1–5.8 cm, obovate to elliptic, hirsute on the adaxial and abaxial surfaces, setulose to hirsute in the main veins, green, apex acute to acuminate, base decurrent, margin serrate. Inflorescence a reduced cyme appearing sessile, with 4–6 clustered axillary flowers; pedicels 0.5–1.2 cm long, erect, green, hirsute; bracts green, elliptic to lanceolate, 1.0–1.5 × 0.2–0.4 cm, hirsute, margin entire, apex acute. Calyx with subequal lobes, the dorsal smaller and folded by the developed nectar chamber, 1.1–1.8 × 0.4–0.9 cm, lanceolate, margin entire, green, hirsute to pilose. Corolla uniformly tubular, 2.5–3.3 × 0.8–0.9 cm, oblique relative to calyx, tube almost straight, base enlarged forming a nectar chamber, longitudinally sulcate, white, villous, lobes 0.3–0.7 × 0.3–0.8 cm, round, erect, subequal, white, margin entire to erose. Androecium with filaments 1.5–2.1 cm long, included, cream-white, filaments coiling in the female phase, anthers united in pairs. Nectary a bilobed dorsal gland, ca 5 mm long, glabrous, pale yellow. Gynoecium with an ovary 5.0–5.4 × 2.5–3.4 mm, conical, pilose, green, stigma bilabiate; style 1.7–2.2 cm long, pale green, pilose. Fruit not observed.</p><p>Distribution and habitat</p><p>Nautilocalyx hirsutus occurs in Peru (Amazonas, Cusco, Loreto, Madre de Dios, Pasco, San Martín) and in northern and central Brazil (Acre, Mato Grosso and Mato Grosso do Sul). This species occurs in humid habitats, usually near watercourses, often along rivers.</p><p>Additional material examined</p><p>BRAZIL – Acre • Mâncio Lima, Parque Nacional da Serra do Divisor, Rio Moa; 6 Dec. 2022; fl.; R. C. Forzza et al. 12331; UPCB . – Mato Grosso • Cuiabá, Balneário Vale Verde, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-55.855553&amp;materialsCitation.latitude=-15.34611" title="Search Plazi for locations around (long -55.855553/lat -15.34611)">Rio Paciência</a>; 15°20’46”S, 55°51’20”W; 287 m; 23 Aug. 2025; fl.; M. E. Engels et al. 13644; UPCB • Rio Verde, 7 Quedas; 27 Aug. 1973; fl.; G. Hatschbach &amp; C. Koczicki 32405; MBM .</p><p>PERU – Loreto • Maynas, Yanomono, Explorama Tourist Camp, Trail to Río Napo; 19 Feb. 1981; fl.; A. H. Gentry et al. 31511; MO [MO-1498923] . – Madre de Dios • Manu, Los Amigos Estación Biológica (CIRCA); 3 Aug. 2010; fl.; M. M. Mora 950; US . – Pasco • Oxapampa, Pichis Valley, Puerto Bermúdez, 2 km SW of town on new road; 6 Sep. 1982; fl.; R. B. Foster 8541; MO [MO-1498919] .</p><p>Taxonomic notes</p><p>Nautilocalyx hirsutus is differentiated from the species in the Nautilocalyx pallidus complex by a hirsute indumentum, pedicels shorter than the petioles, the calyx lobes lanceolate and less than 7 mm wide (Fig. 6 B), and a uniformly white corolla (Fig. 6 B, C).</p><p>This species is often annotated as Nautilocalyx pallidus in herbaria, but the hirsute indumentum and the narrower calyx lobes are useful diagnostic characters (Table 1). In Brazil, there are specimens showing intermediate features between N. hirsutus and N. pallidus, which is why we compare it in Table 1. Some populations currently recognized as N. hirsutus exhibit a corolla with a distinctive purple-blotched nectar guide on the internal surface of the corolla tube, contrasting with the predominantly white corolla observed in the typical form. This variation is currently treated as intraspecific within N. hirsutus; however, further morphological and molecular studies may support the recognition of these purple-blotched populations as a distinct taxon.</p></div>	https://treatment.plazi.org/id/CC60AD7267905DF183382910DA0E9032	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Hinoshita, Lucas Katsumi Rocha;Onofre de Araujo, Andréa;Goldenberg, Renato;Clark, John L.	Hinoshita, Lucas Katsumi Rocha, Onofre de Araujo, Andréa, Goldenberg, Renato, Clark, John L. (2026): Untangling the Nautilocalyx pallidus complex (Gesneriaceae) with description of a new species and a new combination. Plant Ecology and Evolution 159 (3): 563-575, DOI: 10.5091/plecevo.183544
95DECFDDE85F57C0947212130B103E41.text	95DECFDDE85F57C0947212130B103E41.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Nautilocalyx ochroleucus (Poepp.) Hinoshita & J. L. Clark 2026	<div><p>2. Nautilocalyx ochroleucus (Poepp.) Hinoshita &amp; J. L. Clark comb. nov.</p><p>Figs 2, 3; Table 1</p><p>Drymonia ochroleuca Poepp., Nov. Gen. Sp. Pl. 3: 5. 1840. (Poeppig 1840: 5) – Type: same as for Nautilocalyx ochroleucus .</p><p>Episcia ochroleuca (Poepp.) Hanst. (Hanstein 1864: 403) – Type: same as for Nautilocalyx ochroleucus .</p><p>Episcia ochroleuca var. angustifolia Hanst. (Hanstein 1864: 403) – Type: BRAZIL – Pará • Colares, Flor. amazon . In sylv. arenos. Insul. [in sandy forest on the island]; May 1832; fl.; E. F. Poeppig s. n.; holotype: W [W 0032187]; isotype: W [W 0032188] .</p><p>Type</p><p>BRAZIL – Amazonas • Ega, Flor. amazon . In paludibus sylvaticis [in swampy forest]; Sep. 1831; fl.; E. F. Poeppig 2559; holotype: W [0032185, 0032186]; isotype: W [0032165] .</p><p>Description</p><p>Plants terrestrial. Stems erect, 10–40 cm long, succulent, rooting at nodes, terete, hirsute, becoming glabrous at maturity, unbranched, green. Leaves opposite, isophyllous; petiole 0.3–0.9 cm long, green, sometimes suffused with red in the abaxial surface, hirsute; blade 9.4–13.9 × 2.7–4.7 cm, narrow elliptic, pilose to glabrescent, pilose in the midveins, green, sometimes with reddish veins in the abaxial surface, or uniformly red on the abaxial surface, apex acute to acuminate, base decurrent, margin serrate. Inflorescence a reduced cyme, appearing sessile, with 2–8 flowers on a reduced peduncle, pedicels 0.5–0.9 cm long, erect, green, pilose to glabrous; bracts green to reddish, 1.1–2.2 × 0.5–0.7 cm, lanceolate. Calyx with subequal lobes, nearly free, dorsal lobe slightly smaller and folded by the nectar chamber, 1.3–2.2 × 0.4–0.7 cm, long-lanceolate, margin entire, or serrate to serrulate at the apex, folded lengthwise by the adjacent lobe, glabrous, green to reddish at apex. Corolla uniformly tubular, 3.3–4.9 × 0.8–1.2 cm, oblique relative to calyx, tube almost straight, base enlarged and forming a nectar chamber, longitudinally sulcate, pale yellow to yellow, villous, lobes 3.6–6.9 × 4.5–6.9 mm, rounded, erect, subequal, yellow, margin entire. Androecium with filaments 1.6–2.7 cm long, included, cream-white, filaments coiling in the female phase, anthers united in pairs. Nectary a bilobed dorsal gland, ca 5 mm long, glabrous, pale yellow. Gynoecium with an ovary ca 5 × 4 mm, conical, pilose, pale green; style ca 2 cm long, pale green, pilose, stigma bilobed. Fruit not observed.</p><p>Distribution and habitat</p><p>Nautilocalyx ochroleucus is endemic to Brazil, in the northern states of Acre, Amazonas, and Pará (Fig. 3). This species is typically found near watercourses and on sandy riverbanks in humid lowland to premontane forests.</p><p>Additional material examined</p><p>BRAZIL – Acre • Mâncio Lima, Parque Nacional da Serra do Divisor, Rio Moa, Trilha para a cachoeira do “ Ar-Condicionado ”; 5 Dec. 2022; fl.; R. C. Forzza et al. 12304; UPCB . – Amazonas • São Gabriel da Cachoeira, Vista Alegre, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-67.333336&amp;materialsCitation.latitude=0.9166667" title="Search Plazi for locations around (long -67.333336/lat 0.9166667)">margem do Rio Negro e foz do Rio Xié</a>; 0°55’N, 67°20’W; 22 Oct. 1987; fl.; C. Farney 1761; NY . – Pará • Oriximiná, Rio Trombetas, Estrada Oriximiná-Cachoeira (BR- 163), ca. 30 km north of Oriximiná; 3 Jun. 1989; fl.; C. Davidson &amp; G. Martinelli 10041; NY • Antonio Lemos; 24 Aug. 1934; fl.; B. A. Krukoff 5890; F .</p><p>Taxonomic notes</p><p>Nautilocalyx ochroleucus is morphologically similar to N. pallidus . These two species are nearly glabrous on the stems and leaves, have reduced inflorescences with clusters of axillary flowers (Fig. 2 A, D), and long lanceolate calyx lobes (Fig. 2 B). Nautilocalyx ochroleucus differs by the smaller and narrower leaf blades (9.4–13.9 × 2.7–4.7 cm vs 11.2–18.1 × 6.1–8.9 cm in N. pallidus), narrower calyx lobes (0.4–0.7 cm wide vs 0.6–1.5 cm in N. pallidus), and pale-yellow corollas (Fig. 2 B, C) without dots or lines (vs white to cream-white with a dorsal line of purple dots inside the tube and lobes in N. pallidus). A summary of distinguishing characters is provided in Table 1. We consider the species originally described by Poeppig (1840) to be heterospecific with N. pallidus and therefore recognize it here under a new combination in Nautilocalyx .</p><p>In the same work where he described Drymonia ochroleuca, Poeppig (1840) also described a “ beta ” (“ β ”) variety, based on material collected from Colares Island in the state of Pará. This variety was validly published later by Hanstein (1864) under the genus Episcia as E. ochroleuca var. angustifolia . According to Poeppig (1840), the variety differs from D. ochroleuca by its shorter stem, narrower leaves, and narrower bracts. However, field-based observations suggest a gradual morphological transition between these characters, along with a broader distribution for the species. We therefore treat E. ochroleuca var. angustifolia as a synonym of N. ochroleucus because the characters used to distinguish it fall within the observed morphological variation of the species.</p><p>Nautilocalyx ochroleucus occurs on sandy riverbanks and along streams, usually in open environments, as indicated in Poeppig’s original description in 1840. This habitat is unusual within the genus but has also been reported in a few other species, such as N. arenarius L. E. Skog &amp; Steyerm.</p></div>	https://treatment.plazi.org/id/95DECFDDE85F57C0947212130B103E41	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Hinoshita, Lucas Katsumi Rocha;Onofre de Araujo, Andréa;Goldenberg, Renato;Clark, John L.	Hinoshita, Lucas Katsumi Rocha, Onofre de Araujo, Andréa, Goldenberg, Renato, Clark, John L. (2026): Untangling the Nautilocalyx pallidus complex (Gesneriaceae) with description of a new species and a new combination. Plant Ecology and Evolution 159 (3): 563-575, DOI: 10.5091/plecevo.183544
A53281C9472E51A5AD96F3EB6E15EE2D.text	A53281C9472E51A5AD96F3EB6E15EE2D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Nautilocalyx pallidus (Sprague) Sprague 1912	<div><p>4. Nautilocalyx pallidus (Sprague) Sprague (Sprague 1912: 89)</p><p>Fig. 1; Table 1</p><p>Alloplectus pallidus Sprague (Sprague 1911: 346)</p><p>Type</p><p>PERU – s. loc. [specific locality unknown]; originally collected as living material by Louis Forget for F. Sander &amp; Sons, St. Albans, subsequently cultivated in the Tropical Pits at the Royal Botanic Gardens, Kew; 24 Nov. 1910; fl.; lectotype (designated here): K [K 000450061]; isolectotype: K [K 000613000].</p><p>Description</p><p>Plants terrestrial. Stems erect, often approaching or exceeding 1 m long, succulent, rooting at nodes, terete, pilose becoming glabrous at maturity, unbranched, green. Leaves opposite, isophyllous; petiole 1.2–1.5 cm long, green, pilose; blade 11.2–18.1 × 6.1–8.9 cm, elliptic to oblanceolate, glabrescent, pilose in the midveins, green, apex acute to acuminate, base decurrent, margin serrulate to serrate. Inflorescence a reduced cyme, appearing sessile, with 2–6 flowers on a reduced peduncle, pedicels 0.5–0.9 cm long, erect, green, pilose to glabrous; bracts green, 0.5–0.7 × 0.2–0.4 cm, lanceolate. Calyx with lobes subequal, nearly free, dorsal lobe slightly smaller and folded by the corolla nectar chamber, 1.1–2.3 × 0.6–1.5 cm, lanceolate, margin entire to serrate from the middle to apex, folded lengthwise by the adjacent lobe, glabrous to pilose, green. Corolla uniformly tubular, 3.1–5 × 0.8–1.8 cm, oblique relative to calyx, tube almost straight, base of the tube enlarged and forming a nectar chamber, longitudinally sulcate, white to cream-white, with a dorsal line of purple dots inside the tube and lobes, sometimes these dots cover the entire corolla and lobes or are absent, villous, lobes 7–9 × 5–6 mm, rounded, erect, subequal, white to cream white, sometimes with purple dots, margin entire. Androecium with filaments 2.3–3.9 cm long, included, cream-white, filaments coiling in the female phase, anthers united in pairs. Nectary a bilobed dorsal gland, ca 5 mm long, glabrous, pale yellow. Gynoecium with an ovary ca 5 × 4 mm, conical, pilose, pale green; style 2.2–2.9 cm long, pale green, pilose, stigma bilobed. Fruit a semidried, bivalved capsule, 0.8–1.2 × 0.5–1 cm, conical, glabrescent, green to pale yellow.</p><p>Distribution and habitat</p><p>Nautilocalyx pallidus occurs in Bolivia (Abuná), Brazil (Amazonas), Colombia (Amazonas, Antioquia, Putumayo), Ecuador (Pastaza), Peru (Amazonas, Cusco, Loreto), and southern Venezuela (Amazonas). The species inhabits humid lowland to premontane forests, non-inundated forests or slightly disturbed forests, often near streams and river margins, including areas along roadsides and forest edges.</p><p>Additional material examined</p><p>BOLIVIA – Abuná • al N del río Orton, Barraca San Juan de Nuevo Mundo; Campamento Dieciocho hasta Democracia, 18 km al N de la barraca Pando; 5 Jul. 1992; L. Vargas et al. 623; US .</p><p>BRAZIL – Amazonas • Rio Javari, non-inundated disturbed forest behind village of Paumari (above Atalaia del Norte); 3 Nov. 1977; fl.; A. Gentry &amp; J. Revilla 20550; MO, SEL .</p><p>COLOMBIA – Amazonas • Leticia, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-69.95&amp;materialsCitation.latitude=-4.05" title="Search Plazi for locations around (long -69.95/lat -4.05)">8–10 km carretera Leticia – Tarapacá, orilla de bosque y bosque primario perturbado</a>; 4°03’00”S, 69°57’00”W; 300 m; 27 Sep. 1991; fl.; J. Betancur et al. 2829; COL, US . – Antioquia • San Luís, eastern slopes of the Cordillera Central, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-74.865555&amp;materialsCitation.latitude=5.9516664" title="Search Plazi for locations around (long -74.865555/lat 5.9516664)">Quebrada la Cristalina, along highway Medellín-Bogotá</a>; 5°57’6”N, 74°51’56”W; 720 m; 13 May 2012; fl.; J. L. Clark et al. 12893; UNA . – Putumayo • Mocoa, Vereda San José del Pepino, Cañón del Dantayaco, estribaciones de la Serranía de los Churumbelos; 5 Aug. 2024, fl., fr.; J. L. Clark 19190; SEL .</p><p>ECUADOR – Pastaza • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-75.97&amp;materialsCitation.latitude=-1.63" title="Search Plazi for locations around (long -75.97/lat -1.63)">Lorocachi, on the path to Lagartococha</a>; 1°37’48”S, 75°58’12”W; 200 m; 25 May 1980; fl.; J. Brandbyge &amp; E. Asanza C. 30886; US • <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-75.97&amp;materialsCitation.latitude=-1.63" title="Search Plazi for locations around (long -75.97/lat -1.63)">Lorocachi, 2 km del Río Curaray, zona sur oeste del campamento militar</a>; 1°37’48”S, 75°58’12”W; 200 m; 23 May 1980; fl.; J. L. Jaramillo et al. 30713; US .</p><p>PERU – Amazonas • Bagua District, Imaza, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-78.33806&amp;materialsCitation.latitude=-5.056667" title="Search Plazi for locations around (long -78.33806/lat -5.056667)">Comunidad de Yamayakat</a>; 5°03’24”S, 78°20’17”W; 350 m; 25 Mar. 2000; fl.; R. Vásquez 26498; MO, SEL • Condorcanqui, Rio Cenepa region, Quebrada Huampami, Rio Cenepa, Monte; 270 m; 8 Jun. 1973; fl.; R. Kayap 919; MO, SEL . – Cuzco • Camisea, campamento Amihuari, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-72.77889&amp;materialsCitation.latitude=-11.863334" title="Search Plazi for locations around (long -72.77889/lat -11.863334)">Camimisea Production Unit, surrounding camp</a>; 11°51’48”S, 72°46’44”W; 469 m; 28 Jan. 1997; fl.; P. Acevedo-Rdgz. 9290; US . – Loreto • Rio Ampiyacu, environ of Pucuraquillo; 8 Mar. 1981; fl.; E. W. Davis s. n.; F .</p><p>VENEZUELA – Amazonas • Rocas ígneas expuestas más abajo del Cerro Arauicana, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-66.166664&amp;materialsCitation.latitude=1.5833333" title="Search Plazi for locations around (long -66.166664/lat 1.5833333)">río Yatua</a>; 1°35’N, 66°10’W; 125–150 m; 12 Apr. 1970; fl.; J. A. Steyermark &amp; G. Bunting 102574; NY .</p><p>Taxonomic notes</p><p>The Forget type specimens from Kew for Nautilocalyx pallidus are limited to a date and country (Peru), therefore making it challenging to geographically locate the type locality. The material collected by Forget was sent to London and later donated to the Kew Botanical Garden collection, but the cultivated material has since been lost. The lithograph of the cultivated material, presumably based on the plant from which the type was prepared, shows the corolla with a distinctive, purple-blotched nectar guide on the dorsal surface of the corolla tube (Sprague 1913), a feature also cited in the original description, but present in a broad range of different Nautilocalyx species. Thus, we do not consider purple-blotched nectar guides as a diagnostic character despite the suggestion by Sprague (1911) in the protologue for N. pallidus . Although a purple-blotched nectar guide is not unique to N. pallidus and occurs in other species of Nautilocalyx, it is useful in combination with vegetative and calyx characters for distinguishing N. pallidus from the other species treated here.</p><p>Nautilocalyx pallidus constitutes a species complex that has historically been broadly circumscribed and has included multiple distinct taxa. We consider N. pallidus to be characterized as a relatively tall terrestrial plant, usually exceeding 1 m in height, with elliptic to oblanceolate leaves and decurrent leaf bases (Fig. 1 D). The leaves are covered with a pilose indumentum when immature, becoming more or less glabrous when mature (Fig. 1 F). The bracts are shorter than, or at most equal to, the pedicel. The pedicel is usually approximately as long as the calyx. The calyx is large with lobes 0.6–1.5 cm wide, lanceolate, usually covering more than half of the corolla tube and the margins entire or slightly serrate near the apex (Fig. 1 A). The corolla tube is white, while the throat and lobes have purplish markings that sometimes extend into the tube (Fig. 1 B). Other characters that are diagnostic for Nautilocalyx pallidus are summarized in Table 1.</p></div>	https://treatment.plazi.org/id/A53281C9472E51A5AD96F3EB6E15EE2D	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Hinoshita, Lucas Katsumi Rocha;Onofre de Araujo, Andréa;Goldenberg, Renato;Clark, John L.	Hinoshita, Lucas Katsumi Rocha, Onofre de Araujo, Andréa, Goldenberg, Renato, Clark, John L. (2026): Untangling the Nautilocalyx pallidus complex (Gesneriaceae) with description of a new species and a new combination. Plant Ecology and Evolution 159 (3): 563-575, DOI: 10.5091/plecevo.183544
