weed vs Spergula arvensis

Other hyponyms of weed include Agrostemma githago, corn campion, corn cockle, crown-of-the-field, knawe, knawel, Scleranthus annuus, corn spurrey, corn spurry, sand spurry, sea spurry, Spergularia rubra, carpetweed, Indian chickweed, Molluga verticillata, alligator grass, alligator weed, Alternanthera philoxeroides, Barbarea vulgaris, rockcress, rocket cress, Sisymbrium barbarea, yellow rocket, Erysimum cheiranthoides, wormseed mustard, jointed charlock, Raphanus raphanistrum, runch, wild radish, wild rape, pennycress, ambrosia, bitterweed, ragweed, thistle, Barnaby's thistle, Centaurea solstitialis, yellow star-thistle, Canadian fleabane, Conyza canadensis, Erigeron canadensis, fleabane, horseweed, Erechtites hieracifolia, fireweed, Hieracium praealtum, king devil, yellow hawkweed, California dandelion, capeweed, cat's-ear, gosmore, Hypochaeris radicata, bastard feverfew, Parthenium hysterophorus, bitterweed, bristly oxtongue, bugloss, oxtongue, Picris echioides, Hieracium aurantiacum, orange hawkweed, Pilosella aurantiaca, Senecio doublasii, threadleaf groundsel, benweed, ragweed, ragwort, Senecio jacobaea, tansy ragwort, groundsel, Senecio vulgaris, cockle-bur, cockle-burr, cocklebur, cockleburr, nettle, tumbleweed, madnep, wild parsnip.