172 



I. Trillium discolor Wray ; Hook. Bot. Mdig. pi. jogy. 1831'.* 

 Trillium sessile vz.'c. Wrayi S. Wats. Proc. Am. Acad. 14: 273. 

 1879. 



Perennial by a rootstock, bright green, glabrous. Stems erect, 

 1-2 dm. tall, smooth; leaves oval, 6-7 cm. long, obtuse, or short- 

 acuminate, 3-5-nerved, mottled, rounded at the base, sessile; 

 flowers sessile; sepals oblong or oblong-lanceolate, 2 cm. long, 

 obtuse or acute, spreading ; petals broadly spatulate, about ^ 

 longer than the sepals, greenish, sessile, rounded and one promi- 

 nently apiculate at the apex ; stamens less than ^ as long as the 

 petals, the filaments nearly wanting ; berry not seen. 



Georgia. 



Apparently a rare species and not lately collected, but very 

 distinct, differing from all its relatives in the peculiar broadly 

 spatulate petals, one of which is distinctly apiculate. 



2. Trillium sessile L. Sp. PI. 340. 1753- 



Perennial by an erect or ascending corm-like rootstock, deep 

 green, glabrous. Stems solitary or clustered, erect, i-2 dm. tall, 

 slender ; leaves oval or suborbicular, 4-8 cm. long, obtuse or acute, 

 rounded at the base, sessile, 3-5 nerved, not mottled ; flowers ses- 

 sile ; sepals lanceolate, 2-3 cm. long, acute or acutish ; petals nar- 

 rowly elliptic, slightly shorter than or longer than the sepals, sessile, 

 acutish, purple; stamens about }4 as long as the petals; filaments 

 dilated at the base, ^-}( shorter than the anthers ; styles elong- 

 ated, nearly straight, berry not seen. 



In woods, Pennsylvania to Minnesota, south to Florida and 

 Mississippi. April and May. 



3. Trillium Underwoodii n. sp. 



Perennial by a horizontal rootstock, bright green, glabrous. 

 Stems solitary or clustered. 1-3 dm. tall, stout; leaves varying 

 from ovate-lanceolate to ovate-orbicular, 8-18 cm., long, acute or 

 short- acuminate, undulate, sometimes crisped, with a velvety lus- 

 tre, mottled with 3 shades of green, rounded or subcordate at the 

 base, sessile; flowers sessile, musk-scented; sepals lanceolate, 4.5- 

 5.5 cm. long, obtuse or acute, erect or spreading, green or purplish- 

 green ; petals lanceolate, elliptic or oblanceolate, 5-5-^.5 cm. long, 

 sessile, acute or obtuse, erect, purple; stamens 3-4 times shorter 

 than the petals, filaments very short, anthers 1.5-2 cm. long, sub- 

 sessile; styles almost wanting; stigmas recurved ; berry ovoid. 



* I am indebted to Dr. B. L. Robinson for a tracing of the original plate of 

 Trillium discolor. 



