Mimosa pudica L, Sp. Pl. 1: 518 (1753)
Name meaning 'shy', referring to the closure of the leaves after they are touched.
Mimosa hispidula Kunth
The stem is erect in young plants, but becomes creeping or trailing with age. The stem is slender, branching, and sparsely to densely
prickly, growing to a length of 1.5 m. The leaves are bipinnately compound, with one or two pinnae pairs, and 10-26 leaflets per pinna.
The petioles are also prickly. Pedunculate (stalked) pale pink or purple flower heads arise from the leaf axils. The globose to ovoid
heads are 8–10 mm in diameter (excluding the stamens). On close examination, it is seen that the floret petals are red in their upper
part and the filaments are pink to lavender. The fruit consists of clusters of 2-8 pods from 1–2 cm long each, these are prickly on
the margins. The pods break into 2-5 segments and contain pale brown seeds some 2.5 mm long. The seeds have hard seed coats which
restrict germination. [from Wikipedia]
Note Mimosa pudica is well known for its rapid plant movement. Like a number of other plant species, it undergoes changes
in leaf orientation termed "sleep" or nyctinastic movement. The foliage closes during darkness and reopens in light. The leaves also close
under various other stimuli, such as touching, warming, blowing, or shaking.
Growing on open, light rich places.
Originally from Central and South America, but now pan-tropical.
Antibiotic, antimicrobial, anti-neurasthenic, antispasmodic, diuretic, nervine, poison, sedative.
Burma: Hti Ka Yoan.
Indonesia/Malaysia: Pokok Semalu, Putri Malu.