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. 11. Atragene. 



Petals usually present. 



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



elongated-cylindrical. 12. Myosueus. 



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. 



IS- Halerpestes." 

 Achenes terete ; leaves compound. 16. Cyrtorhyncha. 



I. CALTHA L. Marsh-marigold, Meadow-gowan. 



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. 



z. TROLLIUS L. Globe-flower. 



I. Trollius albifloTus (A. Gray) Rydb. (T. laxus albMorus 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 

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

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

 Creek; Massif de I'Arapahoe. 



3. ACTAEA L. Bane-berry. 



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



Fruit white, ellipsoid, g-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. viridiAora. 



