The large flowered purslane is an annual herb, measuring 10-30 centimeters in height. The stem is lying flat or slanting upwards, purple red in color, with many branches and clustered hairs on the nodes. The leaves are densely distributed at the ends of the branches, and the lower leaves are irregularly interlocked. The leaves are thin cylindrical and hairless. Flowers solitary or clustered at the ends of branches, with a diameter of 2.5-4 centimeters, open on the day and close at night; 8-9 leaf shaped bracts, whorled, with white long soft hairs; Petals 5 or double, inverted, slightly concave at the top, measuring 12-30 millimeters in length, red, purple, or yellow white. Capsule nearly elliptical, lid cracked; The seeds are small, mostly round kidney shaped, with a diameter of less than 1 millimeter. The flowering period is from June to September, and the fruiting period is from August to November.