144 RANUNCULACEAE. 



Basal leaf-blades cordate at the base; plant glabrous. 15. R. abortivus. 

 Basal leaf-blades rarely cordate at the base ; plant hairy. 



16. R. micranthus. 

 All the leaf-blades divided or lobed. 



Lower leaf-blades less deeply lobed, often not more than half down to the base. 



17. R. sceleratus. 

 Leaf-blades all divided to near the base. 18. R. eremogenes. 



Recuevati. 



Flowers small ; petals only 2-$ mm. long. 



Stem glabrous. i9- R- Douglasii. 



Stem hairy ; with spreading hairs. 



Petals 2-3 mm. long. 20. R. Bongardii. 



Petals 4-5 mm. long. 21. R. Earlei. 



Flowers larger; petals 5-10 mm. long; stem appressed-pubescent. 



22. R. acriformis. 



Repentes. 



Heads of achenes oblong, about 5 mm. thick. 23. R. pennsylvanicus. 



Heads of achenes globose, about 8 mm. thick. 24. R. Macounii. 



MULTIFIDI. 



Leaf-blades deeply cordate at the base ; primary divisions lobed or dissected. 



25. R. Pwshii. 

 Leaf-blades truncate or slightly cordate at the base ; primary lobes merely crenate 

 or entire. 26. R. intertextus. 



1. Ranunculus reptans L. (R. Flammula reptans E. Meyer) On sandy 

 shores from Lab. to Alaska, N. J., Utah and Ore. — Alt. 5000-10,000 ft. — 

 Vicinity of Como; bank of Michigan, North Park; Trapper's Lake; plains 

 and foot-hills near Boulder; Ward; Gunnison; Parlin; Twin Lakes; Steam- 

 boat Springs. 



2. Ranunculus unguiculatus Greene. In wet places in the mountains of 

 Colo. — Alt. 9000^12,000 ft. — Grand Mesa; Buflfalo Pass; near Pagosa Peak; 

 Deep Creek Lake, Garfield Co. ; Rabbit-Ear Range, Routt Co. ; Beaver Creek. 



3. Ranunculus alismaefolius Geyer. {R. calthaefoUus Greene) In wet 

 places from Wyo. to Nev., Colo., Utah and Ore. — Alt. 10,000-12,000 ft. — 

 Deep Creek Lake ; Bear Creek Divide ; Cameron Pass ; Tennessee Pass ; 

 Golden; Berthoud Pass; headwaters of Clear Creek; alpine ridges east of 

 Middle Park. 



4. Ranunculus Macauleyi A. Gray. In wet places, among rocks, on alpine 

 peaks of Colo. — Alt. 10,000-12,000 ft. — Red Mountain; Carson; Pagosa Peak; 

 West Spanish Peak; Bear Creek Divide; Hinsdale Co. 



5. Ranunculus ellipticus Greene. {R. glaberrimus Coulter, in part.) In 

 wet places from Mont, to B. C, Colo, and Calif. — Alt. 5000-12,000 ft. — Rist. 

 Caiion; foot-hills, Larimer Co.; gulch west of Bellone; Dixon Caiion; foot 

 of Horsetooth Mountain; Ft. Collins; Berthoud Pass. 



6. Ranunculus cardiophyllus Hook. (i?. afUnis cardiophyllus A. Gray) 

 In wet meadows and bogs from Sask. to Colo. — Alt. 5000-10,000 ft. — Table 

 Rock; gulch east of Stove Prairie; Campton's ranch, 12 miles below Grand 

 Lake; Veta Pass; Twin Lakes; Tennessee Pass; Graham's Peak; divide be- 

 tween Colorado Springs and Denver; Eldora to Baltimore. 



