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TRILLIACEAE. 
Family 31. TRILLIACEAE Lindl. Trillium Family. 
1. TRILLIUM L. Trillium, Wake-robin. 
1. Trillium ovatum Pursh. In rich woods from Mont, to Wash., Colo, 
and Calif.—Alt. about 9000 ft.—Columbine. 
Family 32. SMILACACEAE Vent. Smilax Family. 
1. NEMEXIA Raf. Smilax, Carrion-flower. 
1. Nemexia lasioneuron (Hook.) Rydb. ( Smilax lasioneuron Hook.; S'. 
herbacea Am. authors, in part; Nemexia herbacea melica A. Nelson) 
Among bushes from Sask. to western Nebr. and Colo.—Horsetooth Gulch; 
along Buckhorn Creek, Larimer Co.; Colorado Springs; South Cheyenne 
Canon. 
Order 17. AMARYLLIDALES. 
Family 33. IXIACEAE Ecklon. Iris Family. 
Styles alternate with the stamens; petals and sepals nearly equal. 
I. SlSYRINCH 1 UM. 
Styles opposite and arching over the stamens, sepals much larger than the petals, 
reflexed. 2. Iris. 
1. SISYRINCHIUM L. Blue-eyed Grass. 
Outer bracts of the spathe little or not at all longer than the inner. 
Small and slender; flowers 10 mm. or less long; capsule less than 3 mm. high. 
1. .S', halophilum. 
Stouter; flowers 12 mm. or more long; capsule 4 mm. or more high. 
2. S. occidentals. 
Outer bracts of the spathe conspicuously prolonged, sometimes 2-3 times as long 
as the inner one. 
Petals and sepals not emarginate, narrowed to the aristulate tip. 
3. S. alpestre. 
Petals and sepals more or less retuse or abruptly contracted to the aristulate 
apex. 4. S. angustifolium. 
1. Sisyrinchium halophilum Greene. In alkaline meadows from Idaho to 
Colo, and Calif.—Colorado (Bicknell). 
2. Sisyrinchium occidental Bickn. In wet meadows from Mont, to Idaho 
and Colorado.—North Park; Doyles; Sapinero. 
3. Sisyrinchium alpestre Bickn. In mountain meadows of Colorado.— 
Alt. about 8000 ft.—Parlin, Gunnison Co. 
4. Sisyrinchium angustifolium Miller. In meadows and around streams 
from Newf. to the Mackenzie River and B. C., south to Va. and Colo.—Alt. 
4000-9000 ft.—Gunnison; Arboles; near Seven Lakes, Pike’s Peak; Crystal 
Park; Dolores; Mancos; Chicken Creek; Grayback mining camps; Cu- 
charas River, below La Veta; Sangre de Cristo Creek; Ft. Collins; North 
Boulder Peak. 
2. IRIS L. Iris, Blue Flag, Fleur-de-Lis. 
1. Iris missouriensis Nutt. In meadows, marshes and along streams from 
N. Dak. to Ida., Colo, and Calif.—Alt. 8000-10,000 ft.—Mancos; Marshall 
