[Vor. 4 
60 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
termediate in this respect between Т. venosum and T. ovatum 
var. stenosepalum. 
T. ovatum may be distinguished from Т. grandiflorum by 
its usually narrower and lanceolate petals, which are acute, 
and color soon changing to rose and dark red. According to 
Mr. Т. Smith of Newry, England,! T. ovatum opens its flowers 
earlier, soon after emerging from the ground. Another im- 
portant difference as regards many specimens is the much 
shorter stamens (anthers about 6 mm.). This feature is not 
constant, however, for in some specimens the anthers reach 
10 mm. as in T. grandiflorum, and there are also intermediate 
lengths. In his ‘Flora of Montana’ Rydberg records this 
species with the statement that the petals are purplish or dark 
rose-colored, oblanceolate, acute, the sepals narrow and the 
peduneles very slender. 
British Columbia to Montana, Colorado, and California (to 
Santa Cruz). 
Specimens examined: 
Washington: Stevens Pass, Cascade Mountains, Aug. 17, 
1893, Sandberg & Leiberg 770 (Univ. Cal. Herb., 170660), 
leaves 1713.5 cm., sepals 19 mm. wide; Tacoma, May 3, 1908, 
J. В. Flett 3430 (Univ. Cal. Herb., 128157) ; Cascade Tunnel, 
alt. 3500 feet, July 15, 1911, М. Е. Jones (Univ. Cal. Herb., 
175870), differs from 7. venosum chiefly in having leaves 
ovate-rhomboid, not oval, and petals turning purple; R. H. 
Platt 189 (Univ. Cal. Herb., 3985). 
California: Dinsmore’s ranch, in valley of Van Duzen 
River opposite Buck Mountain, Humboldt Co., June 26, 1913, 
J. P. Tracy 4350 (Univ. Cal. Herb., 175281) ; Sherwood Val- 
ley, May 29, 1899, W. C. Blasdale 1039 (Univ. Cal. Herb., 
30092), sepals narrowish, 6 mm., petals drying purple; 
Comptche, Mendocino Co., June, 1906, H. A. Walker 300 
(Univ. Cal. Herb., 112751), leaves 1714.5 em., sepals 18 mm. 
wide; near Ukiah, 1897, Carl Purdy (Univ. Cal. Herb., 3993) ; 
San Leandro Creek, Oakland Hills, San Francisco Bay, March 
23, 1901, H. M. Hall 875 (Univ. Cal. Herb., 3987); Aptos, 
1 See Rendle, A. В. Notes on Trillium. Jour. Bot. 39: 331. 1901. 
