RANUNCULACEAE. 
147 
17. THALICTRUM L. Meadow-Rue, 
Flowers perfect. 
Plant 2 dm. or less high; achenes turgid; filaments filiform. 1. T. alpinum. 
Plant 3-10 dm. high; achenes flat and very oblique; filaments clavate. 
2. T. sparsiflorum. 
Flowers dioecious or polygamous. 
Achenes turgid, thick-walled; ribs thick and almost corky, separated by acute 
grooves. 
Plants polygamous; stem-leaves subsessile. 
Achenes, petioles and lower surface of the leaves decidedly viscid-pubescent. 
3. T. dasycarpwn. 
Achenes, petioles and the lower surface of the leaves glabrous or slightly 
viscid-puberulent. 4. T. purpurascens. 
Plants dioecious; stem-leaves petioled. 5. T. venulosum. 
Achenes more or less flattened, thin-walled; ribs not thick, separated by wide 
shallow rounded grooves ; achenes not twice as long as broad, decidedly oblique. 
6. T. Fendleri. 
1. Thalictrum alpinum L. In alpine and arctic bogs from Greenl. to 
Alaska, Colo, and Calif.—Alt. 9000-12,000 ft.—Como; Alpine Tunnel; Seven 
Lakes; Tennessee Pass; near Wyoming line, North Park; Hamor’s Lake, 
above Durango; West Indian Creek; Pike’s Peak; headwaters of Clear 
Creek; alpine ridges east of Middle Park. 
2. Thalictrum sparsiflorum Turcz. In wet ground from Mont, to Alaska, 
Colo, and Calif.—Alt. 6000-8500 ft.—Happy Hollow; near Georgetown; Carle- 
ton Lake; Parlin; Long Gulch, Larimer Co.; Minnehaha; headwaters of 
Clear Creek; Empire. 
3. Thalictrum dasycarpum Fisch. & Lall. In wet meadows from Ont. to 
Sask. and Colo.—Alt. 4000-8000 ft.—Ft. Collins; La Veta; New Windsor; 
bank of river, Larimer fc Co.; Wahatoya Creek; Pagosa Springs; Walsenburg. 
4. Thalictrum purpurascens L. (T. Cornuti Torr., in part; not L.) In 
wet meadows from N. S. to Sask., Fla. and Colo.—Alt. 4000-6000 ft.—Along 
the Poudre; Ft. Collins and La Porte; plains and foot-hills near Boulder. 
5. Thalictrum venulosum Trelease. On hills and in open woods from Man. 
to B. C. and Colo.—Alt. 5000-12,000 ft.—Dillon Canon; Cache la Poudre; 
Gunnison; Estes Park; Cumberland Mine, La Plata Mountains. 
6. Thalictrum Fendleri Engelm. In the mountains from Wyo. to N. M. 
and Ariz.—Alt. 6000-10,000 ft.—Foot-hills, Larimer Co.; Dillon Canon, 
Trinidad; gulch west of Pennock’s; Livermore; Steamboat Springs; Four- 
Mile Hill, Routt Co.; vicinity of Ouray; Villa Grove; Ute Pass; Dillon; foot 
of Pike’s Peak; Veta Pass; West Indian Creek; North Cheyenne Canon; 
Mancos; Silver Plume; Idaho Springs; Arboles; Pagosa Peak; Chicken 
Creek; Bob Creek; Colorado Springs; Turkey Creek; Sangre de Cristo 
Creek; Eldora to Baltimore. 
Family 55. NYMPHAEACEAE DC. Water-lily Family. 
1. NYMPHAEA L. Yellow Water-lily. 
1. Nymphaea polysepala (Engelm.) Greene. In lakes and slow streams 
from Mont, to Alaska, Colo, to Calif.—Alt. up to 11,000 ft.—Chambers’ Lake; 
Bierstadt Lake. 
