RANUNCULACEAE. 135 



Carpels i-ovuled ; fruit an achene. 



Petals wanting ; sepals often petal-like. 



Sepals imbricated in the bud; leaves all alternate, or only those subtending 



the inflorescence opposite. 



Flowers subtended by opposite or verticillate leaf-like bracts. 

 Styles short, not elongated in fruit. 7. ANEMONE. 



Styles much elongated in fruit, plumose. 8. PULSATILLA. 



Flowers not subtended by opposite or verticillate bracts ; leaves all alternate, 



ternately compound. 17. THALICTRUM. 



Sepals valvate in the bud ; leaves all opposite. 



Flowers cymose-paniculate, dioecious or polygamo-dioecious ; stamens and 



sepals spreading. 9. CLEMATIS. 



Flowers solitary, perfect. 



Stamens erect ; sepals thickish, more or less converging ; staminodia 



wanting. 10. VIORNA. 



Stamens spreading ; sepals thin, spreading from the base ; staminodia often 



present. n. ATRAGENE. 



Petals usually present. 



Sepals spurred ; small annuals with basal linear leaves ; receptacle in fruit 



elongated-cylindrical. 12. MYOSURUS. 



Sepals not spurred ; plant usually bearing cauline as well as basal leaves ; 



receptacle in fruit spherical, conical or short-cylindric. 

 Achenes transversely wrinkled; petals white. 13. BATRACHIUM. 



Achenes not transversely wrinkled ; petals yellowish at least without. 

 Achenes not ribbed. 14. RANUNCULUS. 



Achenes longitudinally ribbed. 



Achenes compressed ; leaves simple, crenate or lobed. 



15. HALERPESTES. 

 Achenes terete; leaves compound. 16. CYRTORHYNCHA. 



i. CALTHA L. MARSH-MARIGOLD, MEADOW-GO WAN. 



i. Caltha leptosepala Hook. (C. rotundifolia (Huth) Greene; C. chiono- 

 phila Greene.) Along brooks and below the snow from the Canadian Rockies 

 to Colo. Alt. 8000-12,000 ft. Cameron Pass; Graymont; Beaver Creek; Al- 

 pine Tunnel; Bear Creek Divide; Marshall Pass; Pike's Peak; Red Moun- 

 tain, south of Ouray; Columbine; Grand Mesa; Carson; Gore Pass; Seven 

 Lakes; near Ironton; Chambers' Lake; Gray's Peak; Front Range, Larimer 

 Co.; South Cottonwood Gulch, Chaffee Co.; Mt. Harvard; Lake City; Em- 

 pire; Rabbit-Ear Range, Routt Co. 



2. TROLLIUS L. GLOBE-FLOWER. 



i. Trollius albiflorus (A. Gray) Rydb. (T. laxus albiflorus Gray) In 

 swamps and along streams from Mont, to Wash., Colo, and Utah. Alt. 9000- 

 12,000 ft Above Beaver Creek; Leroux Park; Cameron Pass; Slide Rock 

 Canon; Mt. Hesperus, above timber line; Pagosa Peak; Grand Mesa; Gray- 

 mont; Red Mountain; Marshall Pass; Crystal Lake; headwaters of Clear 

 Creek; Massif de TArapahoe. 



3. ACTAEA L. BANE-BERRY. 



Filaments whitish ; raceme short ; pedicels in fruit 1-3 cm. long. 



Fruit white, ellipsoid, 9-12 mm. long. i. A. eburnea. 



Fruit red, spherical or nearly so, 5-7 mm. long. 2. A. arguta. 



Filaments greenish ; raceme elongated ; pedicels very short, even in fruit less than 



i cm. long; fruit red. 3. A. viridiflora. 



