Volume 4 > Part 3 > Year 2018 > Page 272 > Leguminosae-Papilionoideae > Crotalaria

34. Crotalaria tetragona Roxb. ex Andrewswfo-0000174083

Bot. Rep. 9: t. 593. 1809; DC., Prodr. 2: 128. 1825; Baker in Hook.f., Fl. Brit. India 2: 78. 1879; Kurz, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 45(2): 266. 1876; Gagnep. in Lecomte, Fl. Indo-Chine 2: 342. 1916; Craib, Fl. Siam. 1: 375. 1928; Munk, Reinw. 6: 215. 1962; Niyomdham, Thai Forest Bull., Bot. 11: 157. 1978; Grierson & Long, Fl. Bhutan 1(3): 733. 1987; Thuân et al., Fl. Cambodge, Laos & Vietnam 23: 226. 1987; J.Q.Li et al. in Z.Y.Wu et al., Fl. China 10: 111. 2010; Ninkaew et al., Phytotaxa 320(1): 55. 2017. Plate XVI: 4.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Herb or shrublet 1–2 m tall, erect; young branches angular, brown pubescent. Stipules narrowly linear, 2–5 mm long, persistent. Leaves simple, lanceolate, 6–17 by 4–6.5 cm, apex acute or obtuse, base obtuse or rounded, margin entire, both surfaces puberulous; lateral veins 9–19 pairs; petioles 1.5–5 mm long, brown pubescent. Inflorescences leaf-opposed, open racemes, 13–30 cm long; peduncle 4–4.5 cm long, brown pubescent; bracts narrowly linear, 4–5 mm long, persistent; bracteoles inserted distally on pedicel, narrowly linear, 3–4 mm long, persistent; pedicels 7–10 mm long, brown pubescent. Calyx 1.8–2.5 cm long, campanulate, bilabiate; tube 3–5 mm long; lobes triangular, 1.5–2 cm long, glabrous inside, brown pubescent outside. Corolla yellow; standard broadly ovate, 2.5–2.7 by 1.8–2 cm, apex acute, base obtuse or cuneate, margin glabrous, claw 3–4 mm long, white tomentose on the upper, glabrous on the lower, margin glabrous; wings oblong, 1.9–2 by 0.6–0.7 cm, apex acute or obtuse, base oblique, margin glabrous, claw 1.5–2 mm long, glabrous; keel ovate, 2.1–2.2 by 1.2–1.3 cm, beak twisted, apex attenuate, base oblique and white tomentose, margin glabrous, claw 1.5–2 mm long, glabrous. Stamens: filaments fused for proximal 3–7 mm, free for distal 8–14 mm; anthers either narrowly linear, 3.5–3.8 mm long or oblong, 1.5–1.8 mm long. Ovary sessile, oblong, 0.8–1 mm long, brown pubescent; style 1.8–2 mm long, adaxially white pubescent in a single line along distal edge, abaxially glabrous. Pods sessile, oblong 4–5 by 0.5–1 cm, brown, pubescent. Seeds reniform, 4–4.3 by 3–3.2 mm, black-brown.

Thailand : NORTHERN: Mae Hong Son (Khun Yuam), Chiang Mai (Hot, Chiang Dao), Chiang Rai (Chiang Kham), Nan (Doi Phu Kha NP), Lampang (Ban Huai Sai, Sop Ngao), Phrae (along road 1022 from Phrae to Ban Nam Klai), Uttaradit (Phu Soi Dao), Tak (Mae Sot), Phitsanulok (Chattrakan); NORTH-EASTERN: Loei (Dan Sai, Phu Kradueng); SOUTH-WESTERN: Kanchanaburi (Thong Pha Phum, Huai Ban Kao); PENINSULAR: Suratthani (Wipawadi).

Distribution : India (type), Myanmar, China, Laos, Cambodia, Vietnam.

Ecology : Open areas in pine and secondary forests dominated by bamboo, 180–2,070 m alt.

Vernacular : Khang lueai (คางเลือย), lom phi (ลมผี)(Loei).