e-Flora of Thailand

Volume 4 > Part 3 > Year 2018 > Page 264 > Leguminosae-Papilionoideae > Crotalaria

25. Crotalaria neriifolia Wall. ex Benth.wfo-0000199924

London J. Bot. 2: 560. 1843; Baker in Hook.f., Fl. Brit. India 2: 74. 1879; Kurz, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 45(2): 266. 1876; Gagnep. in Lecomte, Fl. Indo-Chine 2: 343. 1916; Craib, Fl. Siam. 1: 372. 1928; Niyomdham, Thai Forest Bull., Bot. 11: 147. 1978; Thuân et al., Fl. Cambodge, Laos & Vietnam 23: 227. 1987; Ninkaew et al., Phytotaxa 320(1): 42. 2017.


Accepted Name : This is currently accepted.


Description : Herb 0.8–1.5 m tall, erect; young branches angular, glabrous. Stipules narrowly linear, 0.5–1 mm long, caducous. Leaves simple, narrowly oblong or linear, 1.7–15.5 by 0.3–1.5 cm, apex acute, base obtuse or cuneate, margin entire, both surfaces glabrous; lateral veins 5–10 pairs; petioles 2–4 mm long, white puberulous. Inflorescences terminal, open racemes, 9–30 cm long; peduncle 1.3–2 cm long, glabrous; bracts narrowly linear, 1–3 mm long, persistent; bracteoles inserted on middle of pedicel, rarely distally, narrowly linear, 0.3–1 mm long, caducous; pedicels 1–1.4 cm long, with arachnoid pubescence. Calyx 1–1.3 cm long, campanulate, bilabiate; tube 2–3 mm long; lobes triangular, 7–10 mm long, both sides glabrous. Corolla yellow; standard elliptic, 2–2.2 by 1.5–1.7 cm, abaxially with red-brown line along veins outside, apex rounded, base truncate, margin glabrous, claw 1–1.5 mm long, glabrous; wings elliptic, 1–1.1 by 0.5–0.6 cm, apex obtuse, base oblique, margin glabrous, claw 1.5–2 mm long, glabrous; keel ovate, 1.2–1.3 by 0.8–0.9 cm, beak twisted, apex attenuate, base truncate white tomentose, margin glabrous, claw 1.8–2 mm long, glabrous, margin white tomentose. Stamens: filaments fused for proximal 3–4 mm, free for distal 5–6 mm; anthers either narrowly linear, 3–3.5 mm long or oblong, 1.8–2 mm long. Ovary stipitate, oblong, 7–8 mm long, brown pubescent; style 11–12 mm long, adaxially white puberulous in a single line along the distal edge, abaxially glabrous; stipe 2–2.5 mm long. Pods oblong, 4.5–5 by 0.8–1 cm, brown, puberulous; stipe 3–4 mm long. Seeds reniform, 3.5–3.8 by 2.8–3 mm, brown-black.


Thailand : NORTHERN: Mae Hong Son, Chiang Mai (Hang Dong, Doi Suthep, Mae Klang Falls, Ob Luang-Bo Luang, Doi Chiang Dao), Chiang Rai (Khun Chae), Lamphun (Doi Khun Tan NP, Mae Li), Lampang (Doi Khun Tan NP), Phrae (Den Chai), Tak (Doi Hua Mot, Bhumibhol Dam); NORTH-EASTERN: Phetchabun (Nam Nao NP), Loei (Na Yang Tai), Nong Bua Lamphu, Udon Thani, Sakon Nakhon (Phu Phan NP, Tham Seri Thai), Kalasin (Somdet), Khon Kaen (Phu Wiang NP); EASTERN: Buri Ram; SOUTH-WESTERN: Kanchanaburi (Thong Pha Phum, Sai Yok, Tha Po, Si Sawat).


Distribution : Myanmar (type), Laos, Cambodia.


Ecology : Along roadsides and open places in deciduous dipterocarp forests, 160–1,040 m alt.


Vernacular : Hing men (หิ่งเม่น), hing nu (หิ่งหนู)(Chiang Mai).


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