^ Plant: Bidens alba [Beggarticks, Romerillo].
Anderson’s Grass Yellow is one of five Eurema species of Grass Yellow butterfly in Singapore. It a small [wingspan: 36-40mm] butterfly of Family Pieridae, that is, the Yellows and Whites.
Photo: Oh Farms; Butterfly Garden, HortPark, Singapore, 20130126
Source: butterflycircle.com