Volume 4 > Part 3 > Year 2018 > Page 267 > Leguminosae-Papilionoideae > Crotalaria

29. Crotalaria quinquefolia L.wfo-0000173752

Sp. Pl. 2: 716. 1753; DC., Prodr. 2: 135. 1825; Baker in Hook.f., Fl. Brit. India 2: 84. 1879; Kurz, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 45(2): 267. 1876; Gagnep. in Lecomte, Fl. Indo-Chine 2: 348. 1916; Craib, Fl. Siam. 1: 373. 1928; Munk, Reinw. 6: 212. 1962; Niyomdham, Thai Forest Bull., Bot. 11: 150. 1978; Thuân et al., Fl. Cambodge, Laos & Vietnam 23: 231. 1987; Rudd in Dassanayake & Fosberg, Revis. Handb. Fl. Ceylon 7: 216. 1991; Ninkaew et al., Phytotaxa 320(1): 47. 2017.

Accepted Name : This is currently accepted.

Description : Herb 0.7–1.5 m tall, erect; young branches angular, white pubescent. Stipules narrowly linear, 2–4 mm long, persistent. Leaves digitately (4–) 5-foliolate; petioles 1.5–5.7 cm long, brown pubescent. Leaflets oblong or oblanceolate, 1.3–9 by 0.3–1.5 cm, apex obtuse or emarginate, base cuneate, margin entire, upper surface glabrous, lower surface silvery pubescent; lateral veins 4–10 pairs, inconspicuous; petiolules 0.2–1 mm long. Inflorescences terminal or axillary, open racemes, 4–22 cm long; peduncle 2–10 cm long, silvery pubescent; bracts deflexed, lanceolate, 8–1.2 by 1.8–2 mm, persistent; bracteoles inserted on pedicel, narrowly linear, 0.5–2 mm long, persistent; pedicels 7–10 mm long, glabrous. Calyx 9–11 mm long, campanulate, bilabiate; tube 5–6 mm long; lobes triangular, 4–5 mm long, glabrous inside, silvery pubescent outside. Corolla yellow; standard obovate, 14–15 by 15–17 mm, apex rounded, base cuneate, margin glabrous, claw 2–3 mm long, white tomentose on the upper and along margin, glabrous on the lower; wings elliptic or ovate, 12–14 by 9.5–10 mm, apex obtuse, base oblique, margin glabrous, claw 5–6 mm long, white tomentose at apex, glabrous on the lower, margin white puberulous; keel ovate, 10–11 by 8–8.5 mm, beak twisted, apex attenuate, base oblique with white tomentose, margin white puberulous, claw 4.5–5 mm long, white tomentose on the upper and along the margin, glabrous on the lower. Stamens: filaments fused for proximal 10–13 mm, free for distal 5–8 mm; anthers either narrowly linear, 2–2.5 mm long or oblong, 0.8–1 mm long. Ovary stipitate, oblong, 6.5–7 mm long, glabrous; style 12–13 mm long, white pubescent in two lines along distal edge; stipe 3–3.5 mm long. Pods oblong, 4.7–5.5 by 1.5–2 cm, brown, glabrous; stipe 7–10 mm long. Seeds reniform, 4–5 by 3–3.5 mm, brown.

Thailand : NORTHERN: Chiang Mai (San Kamphaeng), Phrae (Ban Thong); NORTH-EASTERN: Loei (Phu Kradueng); SOUTH-WESTERN: Ratchaburi (Chom Bueng); CENTRAL: Chai Nat (Nakhon Sawan-Chai Nat km. 193), Saraburi (Mueang District, Sam Lan), Krung Thep Maha Nakhon (Bangkok) (Bang Khen); SOUTH-EASTERN: Sa Kaeo (Aranyaprathet), Chon Buri (Bangsaen, Si Racha); PENINSULAR: Songkhla (Sathing Phra).

Distribution : N America, Africa, Sri Lanka, India (type), Myanmar, Laos, Cambodia, Vietnam, Singapore, Australia.

Ecology : Evergreen forests, to 1,500 m alt.

Vernacular : Ya pong lom (หญ้าโป่งลม)(Loei); hing hoi (หิ่งห้อย)(Northern).