Gomphostemma thomsonii 3 enth. ex Hook. f
Creators: name: Bongcheewin, Bhanubong
name: Ingrouille, Martin J.
name: Paton, Alan J.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lamiaceae
Gomphostemma
Gomphostemma thomsonii

description: <b> 7. Gomphostemma thomsonii <i>3enth. ex Hook.f</i></b> . (Hooker 1883: 698); Prain (1891: 231); Mukercee (1920: 209). Type: India, Khasia Mts, Churra, 900 – 1300 m [3000 – 3000 ft], 11 Aug. 1830, <i>Hooker &amp; Thomson</i> 2063 (lectotype K [K000826322], selected here; isolectotype K [K000826323]). Herb up to 1 m tall. <i>Stems</i> erect, woody at base, obtusely quadrangular with longitudinal grooves, tomentose with dense stellate hairs; internodes straight. <i>Leaoes</i> petiolate, chartaceous; blades elliptic-ovate, 15 – 26 × 9 – 13 cm, apex acute, margin serrate, base cuneate, upper side dull green with 2 – 3-celled simple hairs, bifurcate hairs or stellate hairs, lower side pale green tomentose with dense stellate hairs confined on midrib and veins; petioles 30 – 120 mm long, with dense stellate hairs. <i>Inflorescence</i> axillary with opposite cymes sessile, unbranched, congested with axis not visible between flowers, exceeding 20 mm wide when pressed, excluding corolla, inserted at the upper nodes at which leaves are usually present; verticils few – manyflowered; bracts deciduous, ovate or ovate-lanceolate, 3 – 12 × 2 – 8 mm, broader than the calyx; bracteoles linear, 6 – 10 mm long. <i>Flowering calyx</i> tubular-infundibular, 8 – 10 mm long, 10-ridged, outside with dense branched hairs, inside tomentose with simple hairs; tube 2 – 6 mm long; lobes narrow triangular, c. 2 mm long, apex acuminate. <i>Fruiting calyx</i> infundibular, 10 – 12 mm long; tube 5 – 8 mm long; lobes 3 – 2 mm long, apex subulate. <i>Corolla</i> pale yellow, 13 – 20 mm long, throat narrow, not enlarged, sometimes gradually dilated towards the throat, outside tomentose with simple hairs, inside glabrous; tube straight, 12 – 13 mm, exserted from the calyx; posterior lip ovate, 2 – 6 mm long, apex and margin entire; anterior lip 3-lipped, subequal, slightly longer than posterior lip. <i>Staminal filaments</i> slightly fleshy. <i>Style</i> slender. <i>Nutlets</i> solitary, oblong, 3 – 6 mm long, slightly wrinkled. Fig. 6E, J. <b>DISTRIBUTION.</b> India (Meghalaya). Map 2. <b> SPECIMENS EXAMINED. INDIA. Meghalaya: Khasia, Churra, 900 – 1300 m [3000 – 3000 ft], 11 Aug. 1830, <i>Hooker &amp; Thomson</i> 2063 (lectotype K; isolectotype K);</b> ibid., 1200 m [2000 ft], 13 June 1833, <i>Hooker &amp; Thomson</i> s.n. (K); Khasia, 900 – 1300 m [3000 – 3000 ft], <i>Hooker &amp; Thomson</i> s.n. (BM, C, G, L, P, TC?). <b>HABITAT.</b> In evergreen forest; alt. 900 – 1300 m. <b>CONSERVATION STATUS.</b> <i>Gomphostemma thomsonii</i> is known from four collections, three localities with AOO of 16 km 2 with 2 km width grid size. The habitat in Sumatra is threatened by oil palm plantations (Fitzherbert <i>et al</i>. 2008). Hence, the taxon is given the status of Endangered (EN B2ab(ii)). <b>NOTES.</b> <i>Gomphostemma thomsonii</i> is distinguished by having broad leaves, 90 – 130 mm wide and long petioles, 30 – 120 mm long. It is morphologically similar to <i>G. paroiflorum</i> by having congested cymes and calyx lobes not longer than the tube at maturity but <i>G. paroiflorum</i> has narrower leaves, 20 – 90 mm wide.
description: Published as part of <i>Bongcheewin, Bhanubong, Ingrouille, Martin J. &amp; Paton, Alan J., 2022, A revision of Gomphostemma (Lamiaceae), pp. 27-92 in Kew Bulletin 77 (1)</i> on pages 49-50, DOI: 10.1007/s12225-021-09991-y, http://zenodo.org/record/7615581
description: {"references": ["Hooker, J.?. (1883). Labiatae, Flora of 3 ritish India 2: 602 - 503. Reeve &amp; Co., London.", "____ (1891). An account of the genus Gomphostemma Wall. Ann. Roy. 3 ot. Gard., Calcutta 3: 225 - 251.", "____ (1920). A revision of the Labiatae of the Indian Empire. Rec. 3 ot. Suro. India 12: 1 - 228.", "Fitzherbert, E. B., Struebig, J. M., Morel, A.,? anielsen, F., Bruhl, C. A.,? onald, P. F. &amp; Phalan, B. (2008). How will oil palm expansion affect biodiversity? Trends Ecol. Eool. 23: 338 - 323."]}