Tên Khoa học: Markhamia stipulata var. canaense: V.S. DangTên tiếng Anh: Tên tiếng Việt: Đinh cà náTên khác:
Markhamia stipulata (Wall.) Seem. ex Schum. var. canaense V.S. Dang
Type: VIETNAM: Ninh Thuan, Thuan Nam District, Ca Na, 30 km southeast of Phan Rang City, alt. 19 m, 11°19'22.32"N 108°48'06.24"E, 20 June 2013, V.S. Dang 210 (Holotype: VNM; Isotypes: VNM, HN, TAI).
Trees small, 3-6 m tall. Young branches sparsely puberulous to glabrescent. Leaves compound, imparipinnate, opposite, 14-20 cm long, foliaceous pseudostipules usually present; leaflets 7-9, opposite, oblong, ovate-oblong or elliptic-oblong, 6-8 x 3-4.5 cm, apex subrotund to acuminate, base broadly acute to rounded, puberulous to glabrescent below, margin entire or crenate, lateral veins 5-7 on each side of midrib, along with main veins convex on both sides. Petiole 2-2.5 cm long; lateral petiolule 0.1-0.2 cm long, terminal petiolule 1-1.5 cm long. Inflorescences a terminal, 8-14-flowered raceme, 14-18 cm long; bracts triangular, 0.1-0.15 x 0.1-0.2 cm, persistent, glabrous. Calyx spathaceous, 3.5-4 cm long, brownish yellow, sparsely puberulous to glabrescent, with a long uncinate at apex. Corolla reddish yellow to reddish brown, 11¬14 cm long, pubescent; base of tube narrow cylindrical, 6-7.5 cm long; apically widening to funnel-shaped, 3-4 cm long; lobes 5, subrotund, dingy yellow internally, 2-2.5cm long, 1.5 cm broad, with scattered warty glands outside. Stamens 4, didynamous, epipetalous, not exserted; filaments 4-5 cm long, glabrous at insertion; anthers 0.4-0.6 x 0.1-0.15 cm. Ovary oblong, narrow, ovule many; style filiform, sparsely puberulous to glabrescent, 9-10 cm long; stigma 2-lobed. Capsules dehiscing loculicidally, linear, compressed, 16-20 x 1.7-2 cm, puberulous to glabrescent, with sparsely tuberculate to warty glands. Seeds long ellipsoid, thin, 3-3.5x 0.5-0.8 cm, membranous winged.
Etymology: The specific epithet is derived from the type locality, Ca Na area of Thuan Nam District in Ninh Thuan Province, Southern Vietnam.
Phenology: Flowering from April to June, and fruiting from July to September.
Distribution: Markhamia stipulata var. canaense is known only from a very restricted area of about 20 hectares in Ca Na of Thuan Nam District, Ninh Thuan Province (Southern Viet Nam), at an elevation of about 19-20 m.
Habitat: This variety occurs in secondary forests, thickets and savannas.
Additional specimen examined: VIETNAM: Ninh Thuan, Thuan Nam District, Ca Na, 30 km southeast of Phan Rang City, alt. 20 m, U°19'23.21"N, 108°48'08.61"E, 18 July 2014, V.S.Dang et al. V1801, and 28 November 2014, V.S.Dang et al. V2256 (VNM!, FU!).
Note: Markhamia stipulata var. canaense is morphologically similar to Markhamia stipulata var. pierrei but differs in having a longer corolla tube, 11¬14 cm long (vs. 8-10 cm long); shorter capsule, 16-20 cm long (vs. 25-43 cm long); lesser number of leaflets,7-9 (vs. 9-13) and lateral veins 5-7 on each side of midrib (vs. 7-9 pairs). It often grows in association with Uvaria micrantha Hook. f. & Thoms., Polyalthia minima Ast., Grewia abutilifolia Vent. ex Juss., Capparis rigida Jacobs, Bauhinia racemosa Lam., Memecylon octocostatum Merr. & Chun., Glochidion hohenackeri (Mull.Arg.) Bedd., Clausena dimidiata Tan., Sauropus poilanei Beille., Koelreuteria paniculata Lamk., Pleiospermum annamense Guill., Tetrastigma pachyphyllum (Hemsl.) Chun, Schefflera canaensis C.B. Shang., Wrightia dubia (Sims) Spreng., Clerodendrum petasites (Lour.) S.Moore.
(Taiwania 60(3): 129-132, 2015)