Rumput semalu
"Malu" means shy in Malay. This describes the plant's reaction to touch. The exact mechanism is not fully understood, but it makes this weed popular among children at play.You can see the leaves at the bottom have already closed once I brushed against them.

"Mimosa pudica", is a creeping annual or perennial herb often grown for its curiosity value: the compound leaves fold inward and droop when touched or shaken, to protect them from predators, re-opening minutes later. The species is native to South America and Central America, but is now a pantropical weed. It grows mostly in shady areas, under trees or shrubs.
