286 RANUNCULACEAE 



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



6. VIORNA. 

 Stamens spreading; sepals spreading from the base. 



Flowers mostly paniculate; sepals white or yellow, firm, without a border; 



staminodia wanting. 5. CLEMATIS. 



Flowers solitary; sepals blue or purple, thin; staminodia usually present. 



7. ATRAGENE. 

 Petals usually present. 



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

 cylindrical; stamens 5. 8. MYOSURUS. 

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



in fruit spherical, conical or short-cylindric; stamens more than 5. 

 Achenes transversely wrinkled; petals white. 9. BATRACHIUM. 



Achenes not transversely wrinkled. 

 Achenes not ribbed. 



Petals yellow, at least without; sepals deciduous. 



Achenes without an empty upper portion; plants not scapose. 



10. RANUNCULUS. 

 Achenes with the lower half enclosing the seed; the upper portion 



empty, flattened and spongy; plants scapose. 



11. COPTIDIUM. 

 Petals pink, rose-colored, or white; sepals marcescent -persistent. 



12. BECKWITHIA. 

 Achenes longitudinally ribbed; petals yellow. 



Achenes compressed; leaves simple, crenate or lobed. 



13. HALERPESTES. 

 Achenes terete; leaves compound. 14. CYRTORHYNCHA. 



Carpels with several ovules; fruit of follicles or berries. 

 Hypanthium not developed; petals wholly superior. 

 Flowers regular. 



Petals inconspicuous or none, not spurred. 

 Fruit of follicles; flowers solitary. 



Follicles sessile: leaves simple or cleft. 



Petals wanting; leaf-blades entire or merely toothed. 



15. CALTHA. 

 Petals present, but small, linear; leaf-blades palmately parted and 



toothed. 16. TROLLIUS. 



Follicles stipitate; petals clawed; leaves compound or dissected. 

 Petals hooded and nectariferous at the summit; leaves ternate. 



17. COPTIS. 

 Petals filiform or linear beyond the nectariferous pit; leaves pin- 



nately dissected. 18. CHRYSOCOPTIS. 



Fruit a berry; leaves twice or thrice ternately compound. 



19. ACTAEA. 

 Petals conspicuous, produced into a spur or at least saccate at the base; leaves 



ternately compound. 20. AQUILEGIA. 



Flowers irregular. 



Posterior sepal spurred. 21. DELPHINUM. 



Posterior sepal hooded, helmet-shaped or boat-shaped. 22. ACONITUM. 

 Hypanthium somewhat developed, lined at the mouth by a fleshy perigynous disk. 



23. PAEONIA. 



1. ANEMONE (Tourn.) L. WIND-FLOWER, ANEMONE. 



Perennial herbs, usually with horizontal rootstocks and erect scapes. Leaves 

 basal, petioled, palmately divided or dissected. Bracts verticillate, usually 3, 

 similar to the leaves, remote from the flower. Flowers terminal, solitary or 

 cymose. Sepals 4-20, mostly 5, petal-like. Petals wanting. Stamens numer- 

 ous. Pistils usually numerous. Achenes compressed, 1-seeded. Stigmas in- 

 trorse, unilateral. 



Plants with tuberous roots; sepals 6-20. 1. A, tuber osa. 



Plants with a rootstock; sepals 5-6, rarely more. 

 Achenes densely villous. 



Style filiform, usually deciduous; heads of fruit spherical or nearly so; involucral 



leaves short-petioled or subsessile. 

 Leaves ternate; segments broadly cuneate or flabelliform, crenate or slightly 



cleft. 2. A. parviflora. 



Leaves 2-4 times ternate; segments linear to oblong or oblanceolate. 

 Styles 1-3 mm. long; leaves 2-3 times ternate. 



Achenes merely strigose on the back, densely villous on the sides; styles 

 23 mm. long; leaf-blades glabrate; segments oblanceolate. 



3. A. tetonensis. 

 Achenes villous all over; style 1-2 mm. long. 



Leaflets thick, glabrate, strongly veined; segments oblanceolate, 



acutish. 4. A. lithophila. 



Leif-blades thin, usually long-hairy, not strongly veined; segments 

 linear to lanceolate, acute. 5. A. globosa. 



