stone·crop 
(stōnkrŏp′)
(stōnkrŏp′)n.
1. Any of various plants of the genus Sedum and other genera such as Hylotelephium that were formerly classified in Sedum, having fleshy leaves and variously colored flowers and frequently grown in rock gardens. Also called sedum.
2. Any of various similar plants of the family Crassulaceae.
[Middle English, from Old English stāncropp : stān, stone; see STONE + cropp, cluster, sprout.]