pennywort
noun
1.
any of several plants of the genus Thlaspi
2.
a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth
3.
highly succulent stemless clump-forming plants with grey-green leaves similar in texture to lumps of granite; South Africa
4.
a commonly cultivated trailing South American plant with peltate leaves and rosy flowers
5.
a commonly cultivated trailing South American plant with peltate leaves and rosy flowers
6.
7.
showy perennial herb with white flowers; leaves sometimes used as edible greens in southeastern United States