1917] 
GATES—THE GENUS TRILLIUM 45 
Nearest 7. sessile but easily recognized by its pubescent 
stem, widely spreading, twisted petals, unpleasant odor, larger 
stamens, and very short filaments. 
In rocky woods, Georgia, Alabama, and Mississippi. 
3. Т. decumbens Harb. Biltm. Bot. Studies 1: 158. 1902. 
This species agrees with T. stamineum in having а pubes- 
cent stem, twisted petals, and very short filaments, and dif- 
fers from it chiefly in having erect petals, decumbent stem, 
flowers not fetid, stamens only one-fourth the length of the 
petals, stigma stout, and a marked prolongation of the anther 
connective. The last feature occurs in no other known species 
of Trillium except as an occasional variation, but is found 
more highly developed as a generic character in the genus 
Paris. 
In rocky woods, northeastern Alabama. 
4. Т. sessile L. Sp. РІ. 340. 1753; Curt. Bot. Mag. pl. 40. 
1790; Lodd. Bot. Cab. 9: pl. 875. 1824; К]. Serres 22: pl. 2311. 
1877; Redouté, Les Liliacées 3: pl. 133. 1807; Lamarck, 
Епсус. Meth. 8: 102. 1808; Illustr. Gen. Tab. 2: pl. 267, fig. 1. 
1823. 
Solanum Virginianum tryphyllon, tripetalo flore atropur- 
pureo, in foliorum sinu absque pediculo sessili, Pluk. Alm. 
Bot. 352. 1696; Phytogr. pl. 111, fig. 6. 1691. 
Solanum triphyllon Catesb. Nat. Hist. Car. 1: 50. pl. 50. 
1754. 
In woods, Pennsylvania to Minnesota, south to Florida, 
Mississippi, and Arkansas. 
5. T. Underwoodii Small, Bull. Torr. Bot. Club 24: 172. 
1897. 
This species is distinguished from T. sessile chiefly by its 
larger sepals, narrowly oblanceolate, longer petals, which are 
also longer relatively to the length of the sepals, and by its 
longer anthers. 
In woods and fields, North Carolina to Tennessee, south to 
Florida and Аааа 
