Noun | 1. | ![]() liliopsid genus, monocot genus - genus of flowering plants having a single cotyledon (embryonic leaf) in the seed family Orchidaceae, orchid family, Orchidaceae - enormous cosmopolitan family of perennial terrestrial or epiphytic plants with fleshy tubers or rootstocks and unusual flowers Brassia lawrenceana, spider orchid - South American orchid with spiderlike pale-yellow to pale-green flowers Brassia verrucosa, spider orchid - Central American orchid having spiderlike flowers with prominent green warts |