Crotalaria micans Link (1822: 228)

Ninkaew, Sakuntala, Balslev, Henrik, Pornpongrungrueng, Pimwadee & Chantaranothai, Pranom, 2017, Crotalaria L. (Fabaceae: Faboideae) in continental Southeast Asia, Phytotaxa 320 (1), pp. 448-450 : 448-450

26. Crotalaria micans Link (1822: 228) . Type :— COLOMBIA. Humboldt 2172 (holotype B-WILLD n.v., isotype P00542121 !).

= Crotalaria anagyroides Kunth (1824: 404) . Type :— VENEZUELA. Humboldt 598 (holotype P00660098 !)

Shrublet, 0.7–2 m high; young branches angular, silvery pubescent. Leaves digitately 3-foliolate. Stipules narrowly linear, 1.3–4.7 mm long, silvery pubescent, caducous. Petioles 0.8–4.5 cm long, brown pubescent. Petiolules 1–3 mm long. Leaflets elliptic, 1.3–7.5 × 0.4–2.3 cm, base cuneate, apex acute or obtuse, margin entire, glabrous upper, brown puberulous lower; lateral veins 7–8 pairs, inconspicuous. Inflorescences terminal, open racemes, 10–30 cm long; peduncle 2.8–7.5 cm long, brown pubescent. Bracts narrowly linear, 5–10 mm long, caducous. Pedicels 3–9 mm long, brown pubescent. Bracteoles inserted in the middle of the pedicel, narrowly linear, 5–10 mm long, caducous. Calyx 6–10 mm long, campanulate, bilabiate; tube 3–5 mm long; lobes triangular, 3–5 × 1–2 mm long, glabrous inside, brown pubescent outside. Corolla yellow. Standard: claw 4–4.2 mm long, white tomentose above and along the margin, glabrous below; blade broadly elliptic, 11–12 × 18–20 mm, base obtuse, apex emarginate, margin glabrous. Wings: claw 3–4 mm long, glabrous; blade oblong, 13–15 × 5–7 mm, base oblique, apex rounded, margin glabrous. Keel: claw 3.8–4 mm long, glabrous; blade ovate, 9–10 × 6–7 mm, beak not twisted, base oblique, apex attenuate, margin glabrous. Stamens: filaments fused for proximal 7–8 mm, free for distal 5–8 mm; anthers either narrowly linear, 2.3–2.5 mm long or oblong, 0.8–1 mm long. Ovary with 1.8–2 mm long stipe, oblong, 7–8 mm long, brown pubescent; style 9–10 mm long, adaxially white puberulous in a single line along the distal edge, abaxially glabrous. Pods with 5–7 mm long stipe, oblong, 3.5–3.8 × 1–1.5 cm, brown with brown puberulous indument. Seeds reniform, 4–5 × 2–3 mm, brown-black.

Representative specimens: — CAMBODIA. Kampot: Kampot district, 18 June 1997, McDonald et al. 5795 ( AAU) . LAOS. Xieng Khouang: April 1952, Vidal 1691 ( P) . MALAYSIA. Johor: 10 July 1977, Maxwell 77-339 ( AAU) . THAILAND. Chiang Mai: Doi Inthanon National Park , 2 February 1978, LØjtnant & Niyomdham 121 ( AAU, BKF) . Saraburi: Thap Kwang , 13 September 1958, Keosongsee s.n. ( BCU) . Songkhla: Khao Kho Hong , 21 September 1980, Choontong s.n. ( PSU) . Tak: Ban Musoe , 22 July 1973, Murata et al. T-16783 ( AAU, BKF, K) . VIETNAM. Dak Lak: 15 April 1975, Thai D 0053 ( HNU) . Lam Dong: Lien Khuong , 28 July 1967, Cuong 259 ( P) . Ninh Binh: Tam Diep , August 1962, Anon. 3119 ( HNU) .

Distribution: —North America, South America ( Colombia, Venezuela), Africa, Asia ( Sri Lanka, China, Thailand, Laos, Cambodia, Vietnam, Malaysia), Australia, Hawaii. ( Figure 16 ).

Ecology: —Open areas and roadsides, elevation 60–2550 m.

Notes: — Crotalaria micans is recognized by its elliptic digitately 3-foliolate leaves, terminal inflorescences, caducous bracts, bracteoles that are inserted in the middle of pedicel, emarginate strandard apex, stipitate ovary and puberulous pods.

Figures

FIGURE 16. Distribution map of Crotalaria micans in continental Southeast Asia.