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<big>''[[Crotalaria verrucosa]]'' L.</big>
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:Family: Leguminosae - Papilionoideae
== Synonyms ==
*''Crotalaria caerulaea'' Jacq.
== Vernacular names ==
*Blue rattleweed, purple rattlebox, warty crotalaria (En)
*Malaysia: gegiring jantan
*Philippines: bulai laua (Tagalog), gulinggam (Sulu), reging (Bagobo). *Burma (Myanmar): hing hai bay yai
*Cambodia: voë(lli) châ:ng, khnâ:ng prâmat' (Pursat), châ:ngkrâ:ng tma:t
*Laos: (ko: hnha:z) lem (Houa Pan)
== Observations ==
*Annual, subwoody herb, 0.5-1 m tall, with many quadrangular, velvety hairy, yellow branches. *Leaves simple, ovate to elliptical, 5-14 cm × 4-9 cm, pubescent; petiole 4-8 mm long; stipules sickle-shaped, 5-20 mm × 4-14 mm, auricled, persistent. *Inflorescence a lax raceme, 5-25 cm long, leaf-opposed, with up to 24 flowers; pedicel filiform, up to 5 mm long; bracts linear-acuminate, 4 mm long; calyx .*Calyx campanulate, 7-11 mm long, hairy, with subequal triangular-acuminate lobes; corolla blue; standard elliptical to suborbicular, 14 mm in diameter; wings ovate-oblong, 13 mm × 6 mm; keel 12 mm × 6 mm, incurved in the middle. *Pod oblongoid, 3-5 cm × 0.8-1.2 cm, short stalked, about 16-seeded. *Seed heart-shaped, 3 mm in diameter, blackish. ''C. verrucosa'' is found in fallow fields and on marshy ground, along rivers and roads, up to 1200 m altitude. It fixes nitrogen and is self-pollinating.
== Selected sources ==
== Authors ==
*M.S.M. Sosef & L.J.G. van der Maesen
[[Category:Auxiliary plants (PROSEA)]]
[[Category:PROSEA]]