Crotalaria sessiliflora L, Herbs, annual or short-lived perennial, erect, 30-100 cm tall. Stems often branching from lower parts, terete, densely coarsely hirsute. Stipules linear, 2-3 mm, persistent or cadu­cous. Leaves simple; petiole nearly absent; leaf blade variable in shape, usually linear to linear-lanceolate, 3-8 × 0.5-1 cm, abaxially densely silky pubescent, adaxially glabrous, base attenuate, apex acuminate. Racemes terminal or leaf-opposed or densely congested and headlike on branch apices, few to many flowered or flowers solitary in axils; bracts linear-lanceolate, 4-6 mm. Pedicel ca. 2 mm; bracteoles inserted at base of calyx tube, similar to bracts.

Valley grasslands, along trails; below 100-1600 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Shandong, Sichuan, Taiwan, Xizang, Yunnan, Zhe­jiang [Bangladesh, Bhutan, Cambodia, India, Indonesia, Japan, Korea, Laos, Malaysia, Myanmar, Nepal, Pakistan, Philippines, Thailand, Viet­nam; Pacific islands].