1917] 
GATES—THE GENUS TRILLIUM 57 
acuminate, rounded at base, with a petiole varying in length 
from З to 20 mm. The petals are oblong or oval to obovate, 
much longer than the sepals, white, striped with purple, par- 
ticularly at the base, the margins waved. The anthers are 
short (about 5 mm.), as long as the filaments, shorter than 
the stigmas, and apparently reddish. In these features 
it agrees with Т. cernuum. The berry is red, whence the name 
of Michaux. 
In swamp woods and bogs, Nova Scotia to Wisconsin, south 
to Missouri, and in the mountains to South Carolina and 
Georgia. 
23. Т. Бсошеп Rydb. Bull. Torr. Bot. Club 33: 394. 1906. 
T. grandiflorum Hook. Fl. Bor. Am. 2: 180. 1840, in part. 
T. obovatum Hook. ibid., in part. 
This species, T. grandiflorum, and T. ovatum agree in their 
main features, especially in flower structure, all having rather 
broad, white petals. The two western species are widely dis- 
tinet from 7. grandiflorum, from which they must therefore 
have separated long ago. T'. Scouleri differs from Т. grandi- 
florum in the shape of the leaves, which are broadly rhom- 
boid, rounded or truneate at base, and in the petals which are 
ovate-oblong, subacute. 
British Columbia to Montana and California. 
24. T. grandiflorum (Michx.) Salisb. Parad. Lond. pl. 1. 
1805; Lodd. Bot. Cab. 14: pl. 1349. 1828; Regel, Gartenfl. 17: 
98. pl. 575. 1868; Garden 36: 394. fig. 1. 1889; ibid. 40: 222. 
pl. 821. 1891; Fl. Serres 10: pl. 991. 1854-5; Meehan's Monthly 
4: 17. pl. 2. 1894; Traill, Stud. Pl. Life in Canada, 35. pl. 3. 
1906; Rendle, Jour. Bot. 39: 330. 1901. 
T. rhomboideum 7. grandiflorum Michx. Fl. Bor. Am. 1: 216. 
1803. 
T. erythrocarpum Curt. Bot. Mag. pl. 855. 1805. 
This species is markedly characterized by (1) its oval or 
rhombic-oval, acuminate leaves, more or less cuneate at the 
sessile or constricted base, (2) its large, oblanceolate or 
obovate-oblanceolate, erect-spreading petals (reaching 7 х 
