by Nathaniel Lord Britton & Addison Brown, An Illustrated Flora of the Northern United States… (1913)
“ Leafy-stemmed herbs (some exotic genera scapose) , with rootstocks or rarely with bulbs, the leaves broad or grass-like, parallel-veined, the veins often connected by transverse veinlets. Flowers perfect, polygamous, or dioecious, regular, racemose, panicled or solitary. Perianth of 6 separate or nearly separate, usually persistent segments. Stamens 6, borne on the bases of the perianth-segments. ”
