1917] 
GATES—THE GENUS TRILLIUM 53 
T. foetidum Salisb. Parad. Lond. pl. 35. 1805. 
T. erectum var. atropurpureum Pursh, Fl. Am. Sept. 1: 
245. 1814; Hook. Fl. Bor. Am. 2: 180. 1840. 
T. purpureum Kin, in Ell. Sketch 1: 430. 1817. 
T. atropurpureum Curt. ex. Beck, Bot. N. & M. States, 361. 
1833. 
T. erectum rubrum Clute, Am. Botanist 9: 76. 1905. 
Leaves characteristically rhombic, acuminate at the apex, 
and more or less cuneate at the base; flower fetid, the petals 
lanceolate or ovate-lanceolate (2.5-4 cm. long), brown-purple, 
filaments 3-4 mm. in length, nearly as long as the anthers. 
In woods, Nova Scotia to Manitoba, south to North Caro- 
lina and the mountains of Georgia, Alabama, and Missouri. 
16a. Var. album (Michx.) Pursh, Fl. Am. Sept. 1: 245. 
1814; Curt. Bot. Mag. pl. 1027. 1807; Lodd. Bot. Cab. 19: pl. 
1850. 1832. 
T. album Small, Fl. Southeastern U. S. 278. 1903, and ed. 2, 
1913. 
T. rhomboideum var. album Michx. Fl. Bor. Am. 1: 215. 
1803. 
The unit variety album occurs sporadically, differing from 
the species only in pigmentation, the petals being white and 
the stamens and ovary whitish or pink (e.g. Westville, Conn., 
Мау 9, 1885, W. A. Setchell | Univ. Cal. Herb., 3974]; Penn., 
James Galen 189 [Univ. Cal. Herb., 3971]). Another series 
of variations, however, runs to an extreme in a form recog- 
nized by Small as a separate species, Т. album. This differs 
not only in having white or pinkish petals which are less 
inclined to be acuminate, but in its smaller flowers and longer 
anthers (8-11 mm. long) with pale connectives colored like 
the filaments. There are thus two independent series of varia- 
tions: one a negative mutation in loss of color without any 
other change, the other a more gradual transition toward a 
white flower, accompanied by decrease in size of flower, in- 
crease in length of anthers, and other changes, the extreme 
condition being recognized as Т. album Small. 
