Polygonum aviculare (common knotgrass)
Amaranthus species
Portulaca bicolor, of Australia
Heracleum sphondylium
Any of various weedy plants sometimes used as pig fodder
Chenopodium album, white goosefoot
purslane tree (Portulacaria afra)
pink purslane (Claytonia sibirica)
Halimione portulacoides
moss-rose purslane, moss rose (Portulaca grandiflora)
shoreline purslane (Sesuvium portulacastrum)
Honckenya peploides
winter purslane, miner's lettuce (Claytonia perfoliata)
the widely-grown edible plant common purslane or summer purslane (Portulaca oleracea)
Any of the family Portulacaceae (order Caryophyllales) of succulent plants.