Crotalaria assamica Bentham 1843
Creators: name: Ninkaew, Sakuntala
name: Balslev, Henrik
name: Pornpongrungrueng, Pimwadee
name: Chantaranothai, Pranom
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fabales
Fabaceae
Crotalaria
Crotalaria assamica

description: 5. Crotalaria assamica Bentham (1843: 481). Type (lectotype designated by Ansari 2008):— INDIA. Assam, Hooker & Thomson s.n. (lectotype CAL n.v.; isolectotype K000591056!). (Figure 30D).   
 Shrublet, 1–3 m high; young branches angular, brown pubescent. Leaves simple. Stipules narrowly linear, 1–4 mm long, brown pubescent, persistent. Petioles 3–5.5 mm long, brown pubescent. Lamina obovate or lanceolate, 3.2–12.5 × 0.7–5 cm, base cuneate, apex acute or obtuse, margin entire, glabrous upper, brown pubescent lower; lateral veins 9–15 pairs. Inflorescences terminal, open racemes, 13–40 cm long; peduncle 8–12 cm long, silvery pubescent. Bracts lanceolate, 5–6 × 0.7–1 mm, persistent. Pedicels 6–10 mm long, brown pubescent. Bracteoles inserted on the pedicel, narrowly linear, 3–5 mm long, caducous. Calyx 10–15 mm long, campanulate, bilabiate; tube 3–5 mm long; lobes triangular, 7–10 mm long, glabrous inside, silvery puberulous outside. Corolla yellow. Standard: claw 2.8–3 mm long, white tomentose above and along the margin, glabrous below; blade orbicular or broadly elliptic, 1.5–1.7 × 1.8–2.3 cm, base cordate, apex rounded, margin glabrous. Wings: claw 3–4 mm long, glabrous; blade elliptic, 16–17 × 8–10 mm, base oblique, apex rounded, margin glabrous. Keel: claw 4–6 mm long, white tomentose above and along the margin, glabrous below; blade ovate, 17–18 × 10–11 mm, beak spirally twisted, base obtuse, apex attenuate, margin white tomentose. Stamens: filaments fused for proximal 1–1.2 cm, free for distal 0.6–1.2 cm; anthers either narrowly linear, 4.5–5 mm long or oblong, 1.2–1.5 mm long. Ovary with 0.5–1 mm long stipe, obovate, 1–1.3 cm long, glabrous; style 1.7–2 cm long, adaxially white pubescent in a single line along the distal edge, abaxially glabrous. Pods with 5–8 mm long stipe, obovate, 5–7.5 × 1.5–2 cm, brown, glabrous. Seeds reniform, 3–5 × 4–5 mm, brown-black.   
 Representative specimens: — CAMBODIA. Mondulkiri, 29 October 2006, Cheng & Leti CL 359 (P). LAOS. Khammouan: Nya Lak, 25 October 2005, Newman et al. LAO535 (BKF, FOF, L, P). Luang Prabang: 6 March 1932, Poilane 20352 (K, L, P). Savannakhet: Muang Phin, 17 September 1920, Poilane 1901 (L, P). Xieng Khouang: April 1952, Vidal 1692 (P). MYANMAR: Magway: 8 February 2011, Man 87051 (QBG). THAILAND. Chiang Mai: Doi Chiang Dao Wildlife Sanctuary, 15 January 2013, Ninkaew 272 (KKU). Chiang Rai: 24 January 1970, Sutheesorn 1410 (BK). Nan: Nanthaburi National Park, 19 February 2014, Ninkaew 312 (KKU). Rayong: Koh Samet, February 1987, Niyomdham et al. 1312 (AAU, BKF). VIETNAM. Cao Bang: Bao Lac, 30 October 1966, Khoi 5339 (HN). Lao Cai: Muong Hum, 9 January 1931, Poilane 18843 (HN, K, L, P). Nghe An: Vinh, Pu Mat National Park, 26 August 1998, Anon . CH 77 (HNU).   
 Distribution: —Asia (India, Myanmar, China, Thailand, Laos, Cambodia, Vietnam). (Figure 4).   
 Ecology: —Open areas in deciduous dipterocarp and evergreen forests, elevation 170–1300 m.   
 Notes: — Crotalaria assamica is recognized by its lanceolate bracts, caducous bracteoles, terminal inflorescences, hairy pedicel and calyx and stipitate pods.
description: Published as part of Ninkaew, Sakuntala, Balslev, Henrik, Pornpongrungrueng, Pimwadee & Chantaranothai, Pranom, 2017, Crotalaria L. (Fabaceae: Faboideae) in continental Southeast Asia, pp. 448-450 in Phytotaxa 320 (1) on pages 448-450, DOI: 10.11646/phytotaxa.320.1.1, http://zenodo.org/record/13699110