Noun | 1. | ![]() liliopsid genus, monocot genus - genus of flowering plants having a single cotyledon (embryonic leaf) in the seed Bromeliaceae, family Bromeliaceae, pineapple family - a family of tropical American plants of order Xyridales including several (as the pineapple) of economic importance black moss, long moss, old man's beard, Spanish moss, Tillandsia usneoides - dense festoons of greenish-grey hairlike flexuous strands anchored to tree trunks and branches by sparse wiry roots; southeastern United States and West Indies to South America |