Portulaca

1. Leaves linear (scarcely 2 mm broad), nearly terete; stems with conspicuous tufts of long dense hairs at the nodes; flowers at least 2 cm broad, variously colored.

P. grandiflora

1. Leaves spatulate to obovate, flat; stems glabrous or with a few short hairs at nodes; flowers not over 1 cm wide, yellow.

P. oleracea

All species found in Portulaca

Portulaca grandifloraROSE-MOSS 
Portulaca oleraceaPURSLANE, PUSLEY 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 10, 2017. http://www.michiganflora.net/genus.aspx?id=Portulaca.