A glabrous, erect, unbranched herb from a stout, perennial, short, scarred rootstock, 8 to 18 inches high; bearing at the top of the stem three light-green, broadly rhombic-ovate or rhombic-oval leaves, 2 to 6 inches long, acuminate at the apex, narrowed and sessile at the base, peduncle erect or nearly so, 1 to 3 inches long, bearing a single flower 2 to 3 inches broad. The three sepals lanceolate, pointed and spreading. Petals three, erect-spreading, oblanceolate, obovate, or rarely ovate-oblong, obtuse or cuspidate, thin, strongly veined, white, usually turning pink with age, much longer than the sepals. Stamens six, with yellow anthers which are about one-half of an inch long; the three styles slender and ascending. Fruit a globose, black, slightly six-lobed berry, three-fourths to I inch in diameter.
Memoir 15 N. Y. State Museum
B. White Trillium; Large-Flowered Wake-Robin - Trillium grandiflorum
Various monstrous forms sometimes occur with two to several long-petioled leaves, double flowers, and even forms with green, variegated or leaflike petals.