chrysophyta: mostly freshwater eukaryotic algae having the chlorophyll masked by brown or yellow pigment; yellow-green and golden-brown algae and diatoms: Xanthophyceae, Chrysophyceae, Bacillariophyceae; some classification systems superseded or subsumed by Heterokontophyta
division: (biology) a group of organisms forming a subdivision of a larger category
umbrella plant: late blooming perennial plant of shale barrens of Virginia having flowers in flat-topped clusters