Timonius bullatus K.M.Wong & J.Chen, 2014

Chen, Junhao, Wong, Khoon Meng, Ent, Antony Van Der & Tan, Hugh T. W., 2014, Nine new species of Timonius (Rubiaceae) from Kinabalu Park, Borneo, Phytotaxa 181 (3), pp. 138-150 : 143

publication ID

https://doi.org/ 10.11646/phytotaxa.181.3.2

persistent identifier

https://treatment.plazi.org/id/03FE513A-4934-FFAD-2FB2-FDB2FA5CA818

treatment provided by

Felipe

scientific name

Timonius bullatus K.M.Wong & J.Chen
status

sp. nov.

Timonius bullatus K.M.Wong & J.Chen View in CoL , sp. nov. ( Figs. 2E & 2G View FIGURE 2 )

Similar to Timonius polyneurus Valeton (1909: 59) ( Fig. 2F View FIGURE 2 ), but differing by fewer secondary veins (8–12 vs. 12–17) and the slightly to conspicuously bullate (vs. plane) upper lamina.

Type: — BORNEO. Sabah: Kinabalu Park , eastern shoulder, 6° 5′ N, 116° 36–40′ E, 2440 m, 10 July 1961 (♀ plant), Chew et al. RSNB 184 (holotype SING; isotypes BO, K, L, SAN) .

Timonius borneensis sensu Beaman & Anderson (2004: 347) View in CoL , pro parte, non Valeton (1909: 48): quoad Clemens & Clemens 50779.

Timonius polyneurus sensu Beaman & Anderson (2004: 348) View in CoL , pro parte, non Valeton (1909: 59): quoad RSNB 184.

Tree to 7.6 m tall; trunk dbh and bark unknown. Stipules lanceolate, plane to slightly 2–ridged, imbricate. Leaves opposite; petioles 3–20 mm long, 1–2.5 mm in diam.; blades narrowly elliptic, 8–15 × 3.4–5.4 cm, base cuneate, apex cuspidate, margins plane, chartaceous, lower surface sparsely to densely appressed-pubescent, upper surface slightly to conspicuously bullate; secondary veins 8–12 on each side of the midrib, 3–20(–26) mm apart from each other; tertiary veins not prominent on lower surface. Inflorescences: female plants with a solitary flower per inflorescence, peduncle length unknown, peduncular bracts triangular, 2.5–4 × ca. 1.5 mm; male plants with 2–3 flowers per inflorescence, peduncles ca. 1.8 cm long. Calyx lobes in female flowers 4, broad-triangular (length about the same as basal width), 1.5–2.5 mm long, densely pubescent outside; in male flowers 4, broad-triangular, 1.5–2 mm long, densely pubescent outside. Corolla View in CoL in female flowers unknown; in male flowers with tube ca. 8 mm long, mature diam. unknown, densely pubescent outside, lobe number unknown, lanceolate, ca. 4 mm long, densely pubescent outside. Fruits globose to ellipsoid, 5–8 mm in diam., glabrous to subglabrous; peduncles 1.2–1.4 cm long, sparsely to densely pubescent; persistent calyx lobes broad-triangular, 1.5–2.5 mm long.

Etymology: —The specific epithet refers to the bullate lamina of this species.

Distribution: —Only known from Kinabalu Park and Mount Trus Madi.

Habitat: —Lower to upper montane forest.

Proposed conservation status: —The conservation status assessed for T. bullatus using GeoCat was Near Threatened ( IUCN 2001). Although its estimated AOO (28 km 2) is within the Endangered range, there is no evidence of decline or fluctuations in EOO, AOO, number of locations, and number of mature individuals. Most known populations occur within Kinabalu Park, which is an important conservation area. However, its narrow distribution renders this species vulnerable to random catastrophic events.

Additional specimens examined (paratypes): — BORNEO. Sabah: Kinabalu Park, Gurulau Spur, 2130–2740 m , 6 December 1933 (♂ plant), Clemens & Clemens 50779 (K, L); Kamborangoh, 19 June 1933 (♂ plant), Carr SF 27671 ( SING); Layang-Layang , 22 February 2011 (♀ plant), Van der Ent et al. SNP 20259 ( SNP); Menteki Ridge , 28 January 2011 (♀ plant), Van der Ent et al. SNP 18706 ( SNP); Mount Tambuyukon , 5 May 2011 (♀ plant), Van der Ent et al. SNP 27152 ( SNP); power station , 24–26 October 1981 (♀ plant), Sato et al. UKMS 1421 ( SAN) . Tambunan, Mount Trus Madi , above Sungei kidukaruk, 13 November 1964 (♀ plant), George SAN 41852 (K, SAN) ; Trus Madi Range , 1940 m , 8 March 1995 (♂ plant), Wong WKM 2638 (L, SAN), 1940 m , 8 March 1995 (♀ plant), Wong WKM 2644 (L, SAN) .

SING

Singapore Botanic Gardens

SAN

Forest Research Centre

SNP

Sabah Parks

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Gentianales

Family

Rubiaceae

Genus

Timonius

Loc

Timonius bullatus K.M.Wong & J.Chen

Chen, Junhao, Wong, Khoon Meng, Ent, Antony Van Der & Tan, Hugh T. W. 2014
2014
Loc

Timonius borneensis sensu Beaman & Anderson (2004: 347)

Beaman, J. H. & Anderson, C. 2004: )
Valeton, T. 1909: 48
2004
Loc

Timonius polyneurus sensu Beaman & Anderson (2004: 348)

Beaman, J. H. & Anderson, C. 2004: )
Valeton, T. 1909: 59
2004
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