umbrella plant

definition: African sedge widely cultivated as an ornamental water plant for its terminal umbrellalike cluster of slender grasslike leaves
example:
speech part: noun
synonyms: umbrella sedge
definition: late blooming perennial plant of shale barrens of Virginia having flowers in flat-topped clusters
example:
speech part: noun
synonyms:
definition: rhizomatous perennial herb with large dramatic peltate leaves and white to bright pink flowers in round heads on leafless stems
example:
speech part: noun
synonyms:

How umbrella plant is being used?