Browse Plants by Type: 4 petals
Plantago patagonica
woolly plantain
Raphanus sativus
wild radish
Rorippa curvisiliqua
western yellow cress
Rorippa nasturtium-aquaticum
white watercress
Rorippa palustris
marsh yellowcress
Schoenocrambe linifolia
plains mustard
Sisymbrium altissimum
tumble mustard
Sisymbrium officinale
hedge mustard
Smelowskia calycina var. americana
alpine smelowskia
Smelowskia ovalis
alpine false candytuft
Stanleya pinnata
prince's plume
Streptanthus cordatus
heart-leaved jewel flower
Thelypodium laciniatum
thick-leaf thelypody
Thlaspi arvense
field pennycress
Thlaspi montanum var. montanum
Fendler's pennycress
Thysanocarpus curvipes
fringe pod