Volume 7 > Part 1 > Year 1999 > Page 98 > Apocynaceae > Strophanthus

3. Strophanthus wallichii A.DC.wfo-0000317354

in DC., Prod. 8: 418. 1844; Hook.f., Fl. Br. Ind. 3: 655. 1882; King & Gamble, J. As. Soc. Beng. 74(2): 469. 1907; Ridl., Fl. Malay Penins. 2: 355. 1923; Kerr, Fl. Siam. En. 2: 461. 1939; Tsiang & P.T.Li, Fl. Pop. Sin. 63: 154. 1977; Beentje, Meded. Landb. Wag. 82–4: 151. 1982; Li et al., Fl. China 16: 179. 1995. Fig. 31; Plate IV: 4.

Accepted Name : This is currently accepted.

Description : Climber or trailing shrub. Leaves: petiole 3-11 mm long; blade papery or subcoriaceous, elliptic to obovate, 3.1–12.6 x 1.6–4.7 cm, apex acuminate, base cuneate or decurrent onto petiole; 5–7 pairs of veins anastomosing before margin. Inflorescence 9–23 cm long; 2–25 flowered; bracts linear, 5–14.5 x 1–2 mm, pubescent. Sepals pubescent, ciliate; linear, 6.8–17.7 mm long. Corolla white or pale yellow with maroon or purplish parts; tube 9.5–19 mm widening at 5.3–8 mm; lobes 2.4–6.5 cm, drawn out into narrow tails; corona lobes narrowly triangular 4.2–6 mm long. Stamens inserted at 7.3–8 mm from corolla base; anthers narrowly triangular, 1–1.4 cm long of which acumen 7.5–11 mm. Ovary 1.4–2.3 mm, minutely pubescent; style + pistil head 6.5–7.5 mm long. Fruit tapering to an obtuse apex; 11–24.5 cm long, 2.5 cm wide; densely lenticellate. Seeds 10–18 x 3–4.3 mm; glabrous; beak glabrous for 0.8–1.5 cm and bearing a coma for 1.4–2.6 cm, coma 5.5–9 cm long.

Thailand : NORTHERN: Chiang Mai; NORTH-EASTERN: Phetchaburi; SOUTH-WESTERN: Prachuap Khiri Khan; SOUTH-EASTERN: Trat; PENINSULAR: Chumphon, Ranong, Phuket, Nakhon Si Thammarat, Phatthalung, Satun, Pattani.

Distribution : China, India, Bangladesh (type), Burma, Laos, Vietnam, Malay Peninsula.

Ecology : In mixed deciduous or evergreen forests to 550 m alt.

Vernacular : Yan yang luang (ย่ายางหลวง)(Peninsular).

Notes: The fruit characters are taken from Beentje (1982).