144 RANUNCULACEAE. 



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

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



1 6. 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. 



RECURVATI. 



Flowers small ; petals only 2-5 mm. long. 



Stem glabrous. 19. 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. Purshii. 



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; Gtmnison; 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; Buffalo Pass; near Pagosa Peak; 

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



3. Ranunculus alismaefolius Geyer. (R. calthaefolius 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. 

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

 of Horsetooth Mountain; Ft. Collins; Berthoud Pass. 



6. Ranunculus cardiophyllus Hook. (R. afiinis 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. 



