His name is Bandotan Grass.
The color is white, some are pink and some are blue. What I discovered this time is a blue coincidence - so often called Blue Floss. Frankly beautiful flowers.
And outside actually also many are cultivated as an ornamental plant. I do not know why in Indonesia kok just the rank of weeds, pests only. I imagine if this grass bloomed all at the same time, then the whole field would look blue.
