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. 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. 
1. CALTHA L. Marsh-marigold, Meadow-gowan. 
1. 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. 
1. Trollius albiflorus (A. Gray) Rydb. (T. laxus albidorus 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 l’Arapahoe. 
3. ACTAEA L. Bane-berry. 
Filaments whitish; raceme short; pedicels in fruit 1-3 cm. long. 
Fruit white, ellipsoid, 9-12 mm. long. 1. 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 
1 cm. long; fruit red. 3. A. virididora. 
