| umbrella plant | (n) rhizomatous perennial herb with large dramatic peltate leaves and white to bright pink flowers in round heads on leafless stems; colonizes stream banks in the Sierra Nevada in California, Syn. Peltiphyllum peltatum, Indian rhubarb, Darmera peltata |
| umbrella plant | (n) late blooming perennial plant of shale barrens of Virginia having flowers in flat-topped clusters, Syn. Eriogonum allenii |
| umbrella plant | (n) African sedge widely cultivated as an ornamental water plant for its terminal umbrellalike cluster of slender grasslike leaves, Syn. umbrella sedge, Cyperus alternifolius |