1917] 
GATES—THE GENUS TRILLIUM 59 
Rootstock horizontal, stem sheathed at base for 2-3 cm., 
green, usually reddish near the base, smooth, 10-15 em. high, 
4-6 mm. in thickness at base, tapering gradually to 2-3 mm. 
at Ше top; leaves rhombic-oval or rhombic-ovate, 4-7 cm. 
long, 3-6 em. wide, sessile or nearly so, acute, acuminate; 
peduncle 2-3 em. in length, erect, flower bent horizontally; 
sepals lanceolate, acute or acuminate, 2-3.5 сш. long, 9-14 
mm. wide; petals forming a tube at base, spreading above, 
margin waved, oblanceolate to obovate-oblanceolate, obtuse or 
broadly acute, sometimes minutely emarginate, 28-44 mm. 
long, 13-22 mm. wide, white at first, soon changing to pale 
pink and fading to purplish pink, considerably exceeding the 
sepals; stamens adnate to base of the petals, filaments white, 
5-6 mm. long, anthers 5-10 mm. long; ovary 6-8 mm. long, 
6-angled, winged, white, three parietal placentae sometimes 
nearly meeting in the center, stigmas slender, erect-spreading, 
3-4 mm. long. 
Specimens examined in Mo. Bot. Gard. Herb.: 
Exeter, №. H., March, 1915, Г. E. Williams, түре; Alma, 
Mich., May 9, 1891, Chas. A. Davis; without locality, E. C. 
Smith, two sheets; Edgebrook, Cook Co., Ill, May 11, 1897, 
Agnes Chase, four specimens; Chautauqua, N. Y., May, 1909, 
Mrs. C. P. Damon; Ithaca, №. Y., April 24, 1891, Н. von 
Schrenk; Battersea, Ont., May 31, 1893, J. Fowler, two speci- 
mens; Mountville, (Ohio?), May, 1889, Mrs. Eby; Middlebury, 
Vt., May 3, 1878, Ezra Brainerd, three specimens. 
25. T.ovatum Pursh, Fl. Am. Sept. 1: 245. 1814. 
T. californicum Kellogg, Proc. Cal. Acad. 2: 50. fig. 2. 1860. 
T. crassifolium Piper, Erythea 7: 104. 1899. 
T. obovatum Hook. Fl. Bor. Am. 2: 180. 1840. 
This species was described by Pursh as follows: “Т. 
peduneulo erecto, petalis oblongis acutis patentibus calyce 
lineari paulo longioribus, foliis ovatis sensim acutis arcte 
sessilibus. On the rapids of Columbia River. М. Lewis. 
4 April. v. s. Flowers pale purple. The characters of T. 
ovatum must be determined by specimens from the original 
region. Such specimens have fairly broad sepals and are in- 
