Centrosema pascuorum Mart. ex Benth.
Bradburya pascuora (Mart. ex Benth.) Kuntze
Family: Fabaceae (alt. Leguminosae) subfamily: Faboideae tribe: Phaseoleae subtribe: Clitoriinae. Also placed in: Papilionaceae.
Centrosema pascuorum is an annual, twining herb that can root from the nodes of trailing stems under moist conditions. Stems are cylindrical, glabrous or scarcely pilose, extending up to 2 m from the crown. Leaves are trifoliolate, often held erect and paraheliotropic especially during dry periods. Petioles are 25-50 mm long, glabrous to scarcely pilose . Leaflets of the Australian cultivars are long (50-100 mm) and narrow (5-10 mm) and give a C. pascuorum sward, from some distance, a grass-like aspect; however, in the available collection there exists also great variation in leaflet shape. Inflorescences are racemose; flowers are borne singly or in pairs at the end of a short peduncle. The corolla is wine red to crimson, 15-25 mm long and wide. Flowers are predominantly self-pollinated. Pods are linear to slightly curved, 4-8 cm long and 3-4 mm wide, laterally compressed with a dark longitudinal stripe. They contain up to 15 seeds and shatter violently at maturity up to 1 m wide thus allowing dispersal of seeds. Seeds are ovoid to cylindrical, approx. 4 mm long, greenish-yellow to brown and rarely mottled. Thousand seed weight of C. pascuorum ranges from 6.8-28.9 g, cv. Cavalcade has a weight of 21 g (48,000 seeds/kg) and cv. Bundey 17 g (58,000 seeds/kg).
C. pascuorum is a tropical lowland species, found naturally at altitudes between 20 m and 1,000 m. Its geographical distribution spans from almost 17°N in Mexico to almost 20°S in Brazil. Main areas of distribution are semi-arid north