umbrella plant

noun

1. African sedge widely cultivated as an ornamental water plant for its terminal umbrellalike cluster of slender grasslike leaves

   Synonym:    umbrella sedgeCyperus alternifolius

2. late blooming perennial plant of shale barrens of Virginia having flowers in flat-topped clusters

   Synonym:    Eriogonum allenii

3. rhizomatous perennial herb with large dramatic peltate leaves and white to bright pink flowers in round heads on leafless stems

   Synonym:    Indian rhubarbDarmera peltataPeltiphyllum peltatum