People report eating other Portulacas besides oleracea (purslane) often, so it doesn't seem like the others are any less edible than purslane. The plant of this discussion looks like a P. grandiflora.
* The edible known as purslane is P. oleracea, and has flat, fat foliage, small yellow flowers with 5 petals. There are no cultivars or hybrids.
* Those with foliage like 'juicy pine needles' are P. grandiflora, variously colored, multi-petaled flowers. (moss roses, many cultivars.)
* The one with foliage that looks like purslane, sold in stores with the annuals with variously colored flowers that are much larger than purslane, with usually 5 petals but sometimes more, is P. umbraticola. (sold as moss roses also, or ornamental purslane, many cultivars.)
You can read more about this here:
http://australianportulaca.blo...
