Gomphostemma grandiflorum Suddee
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 grandiflorum

description: <b> 13. Gomphostemma grandiflorum <i>Doan ex Suddee &amp; A.J.Paton</i></b> (2006: 620);? oan (1936: 1032); Phuong (2000: 103). Type: Vietnam, Tonkin, Thua-luu (Thuu Thien-Hue), <i>Lecomte &amp; Finet</i> 1320 (holotype P [P00322251]; isotype P [P00322252]. Herb up to 2 m tall. <i>Stems</i> erect, robust, obtusely quadrangular with longitudinal grooves, with stellate hairs; internodes straight. <i>Leaoes</i> petiolate, coriaceous; blades ovate or ovate-oblong, 6 – 23 × 3 – 12 cm, apex acute, margin shallowly dentate-serrate, base cuneate or oblique, upper side tomentose with 2 – 2-celled simple hairs, sometimes bifurcate hairs, lower side pale green tomentose with dense stellate hairs; petioles 13 – 50 mm long. <i>Inflorescence</i> axillary with opposite cymes subsessile, congested with axis not visible between flowers, inserted at the upper nodes at which leaves are usually present, subtended by the upper leaves only; verticils (3 –) 10 – 20- flowered; bracts deciduous, elliptic-ovate, 10 – 23 × 3 – 12 mm, apex acute, margin shallowly dentate at the apical part and entire at the basal part, base cuneate, with stellate hairs on both sides; bracteoles linear, 5 – 12 mm long. <i>Flowering calyx</i> infundibular, 10 – 12 mm long, thickly 10-ridged, outside with dense stellate hairs with a 1-celled stalk, inside glabrous below and adpressed simple hairs above; tube 3 – 5 mm long; lobes broadly triangular, c. 3 mm long, apex acute, margin slightly revolute. <i>Fruiting calyx</i> ovate-cupular, 13 – 18 mm long; tube 8 – 10 mm long; lobes broadly triangular, 5 – 8 mm long, apex acuminate, margin revolute in cross section. <i>Corolla</i> white, 30 – 30 mm long, throat much inflated, abruptly dilated near the throat, outside with stellate hairs, inside glabrous; tube very slender, incurved, 20 – 20 mm long; posterior lip obovate, 3 – 10 mm long, apex round; anterior lip 3 – 10 mm long; median lobe folding outward, obovate, 12 – 12 mm long, apex and margin undulate; lateral lobes broadly ovate, apex and margin undulate. <i>Staminal filaments</i> fleshy, tomentose. <i>Style</i> slender, 30 – 23 mm long, glabrous with apex unequally lobed. <i>Nutlets</i> 1 – 2, ovate or elliptic-ovate, 3 – 9 × 2 – 6 mm. <b>DISTRIBUTION.</b> Vietnam. Map 3. <b> SPECIMENS EXAMINED. VIETNAM: Thua Thien Hue: Thua Luu [16.3°, 108°], 18 Nov. 1911, <i>Lecomte &amp; Finet</i> 1320 (holotype P; isotype P);</b> Thua Thien, Bach Ma [16.2°, 105.8665°], 20 Aug. 1921, <i>Vidal</i> 690A (P);?a Nang: Ba Na Nui Chua, 13°39&amp;9.35&amp;N 105°39&amp;6.5”E, 21 Oct. 2008, <i>Du et al.</i> HNK 3193 (K); Tourane [?a Nang], Mt Bani [16.1222°, 105.9832°], May – July 1925, <i>Clemens &amp; S. Clemens</i> 3883 (G, K, P); Quang Nam: Confin sud de la province de Quang Nam entre les villages Aboi de Maung Tra et?ai-lo, 1300 m, 25 Feb. 1921, <i>Poilane</i> 31881 (P); Kon Tum: NW Slope of Ngoc Linh mountain system [13.0665°, 105.9833°], 1600 – 1800 m, 23 Feb. 1993, <i>Aoeryanoo et al.</i> VH 232 (AAU, P). <b>HABITAT.</b> In hill evergreen forest, stream margins and open secondary forest in shady areas; alt. 1300 – 1800 m. <b>CONSERVATION STATUS.</b> <i>Gomphostemma grandiflorum</i> is known from a few collections but its habitat is clearly threatened by agriculture and rapid development procects in Vietnam (Paton <i>et al.</i> 2016): the EOO and AOO of this species are 1060.55 and 22 km 2, respectively. Hence, the Endangered category is applied. (EN B1ab(i, ii, ii) and B2ab(i, ii, iii)). <b>PHENOLOGY.</b> Flowering May – November. Fruiting October – February. <b>NOTES.</b> <i>Gomphostemma grandiflorum</i> is a distinctive species by having large corolla, 30 – 30 mm long, and leaf 60 – 230 × 30 – 120 mm, calyx lobes not longer than the tube, a congested inflorescence and fruiting calyx lobes revolute in cross section. <i>Gomphostemma leptodon</i> also has similar morphological characters, large flowers and leaves, but its calyx lobes are mostly longer than the tube.
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 page 54, DOI: 10.1007/s12225-021-09991-y, http://zenodo.org/record/7615581
description: {"references": ["? oan, T. (1936). Labiatae. In: H. Lecomte (ed.), Flore Generale de L' Indo-Chine 2: 913 - 1026. Masson, Paris.", "Phuong, V. X. (2000). Lamiaceae (Labiatae). In: N. T. Ban, T.?. Ly, T. C. Khanh, P. K. Loc, N. N. Thin, N. V. Tien &amp; N. K. Khoi (eds), Flora of Vietnam 2: 1 - 258. Science &amp; Technics Publishing House, Hanoi.", "Paton, A., Phillipson, P. B. &amp; Suddee, S. (2016). Records of Wenchengia (Lamiaceae) from Vietnam. 3 iodioers. Data J. 2: e 9396."]}