Volume 4 > Part 2 > Year 1985 > Page 151 > Leguminosae-Mimosoideae > Mimosa

1. Mimosa pigra L.wfo-0000165078

Cent. I. Pl. 1: 13. 1755; Brenan in Fl. Trop. E. Af.: 43. 1959; Nielsen in Fl. C.L.V. 19: 34. Pl. 5, 8–14. 1981. Fig. 36: 8–14.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Erect or scandent shrub up to ca 4 m high; branches distinctly woody. Leaves pinnately compound; petiole 0.8(–2.8) cm long; rachis 11–17 cm long, slightly angulate, densely strigose, armed with a straight, distally pointing thorn, ca 0.3–1.1 cm long at the junctions of each pair of pinnae; pinnae ca 10–14 pairs, ca 3.5–4.5 cm long, strigose; leaflets ca 45 pairs per pinna, 5.5–8.5 by 0.8–1.1 mm, linear-oblong, with strigose margins. Inflorescence: peduncles paired in the axils of the upper leaves, ca 2 cm long, strigose, bearing many-flowered heads of sessile flowers. Calyx ca 1 mm long, scarious, entire part ca 0.5 mm long, glabrous, distal part densely laciniate. Corolla 3 mm long, funnel-shaped, tube glabrous, lobes 1.2 mm long, elliptic-ovate, acute; glabrous in the proximal part, hirsute in the distal. Stamens 8. Ovary 1.5 mm long, densely velutinous. Pods several developed from the same head, ca 6 by 1 cm, linear-oblong, straight, beaked, densely scabrous; segments 0.2–0.3 cm long.

Thailand : NORTHERN: Chiang Mai.

Distribution : A pantiopical weed, probably from S America but introduced all over the Tropics, especially in Africa, spreading rapidly in Asia, type – locality uncertain.

Ecology : Roadsides, clearings, waste-grounds, up to 1,100 m alt.

Vernacular : Maiyarap ton (ไมยราบต้น)(Northern).