CROWFOOT FAMILY 87 



Leaves palmately cleft. 4. Trautvetteria. 



Sepals valvate in the bud; leaves all opposite. 



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. Atragexe. 

 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. Batr.achium. 

 Achenes not transversely wrinkled. 

 Achenes not ribbed. 



Petals yellow, at least without; sepals deciduous. 



Achenes without an empty upper portion ; plants not scapose. 



10. Raxtjxculus. 

 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. HALERPE3TES. 



Achenes terete; leaves compound. 14. Cyrtorhyncha. 



Carpels with several o^-ules; 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. 



1.5. Caltha. 

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

 toothed. 16. TROLLirs. 



Follicles stipitate; petals clawed; leaves compound or dissected. 

 Petals hooded and nectariferous at the summit; leaves ternate. 



17. COPTIS. 



Petals flUform or hnear 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 compoimd. 20. Aouilegi.\. 



Flowers irregular. 



Posterior sepal spurred. 21. Delphintjm. 



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

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



23. Paeoxia. 



1, ANEMONE (Tourn.) L. Wind-flower, Anemone. 



Plants with tuberous roots; sepals 6-20. 1. A. tuberosa. 



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

 Achenes densely villous. 



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

 leaves short-petioled or subsessile. 

 Leaves ternate; segments broadly cuneate or flabelUform, 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 

 2-3 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. lithnphila. 



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

 linear to lanceolate acute. 5. A. globosa. 



Styles 4-6 mm. long; leaves 3—4 times ternate; segments narrowly linear. 



6. A. Drummondii. 

 Styles subulate, persistent; heads of fruit from rounded oblong to cyUndric; 

 involucral leaves long-petioled. 

 Heads elongate, cyUndric; styles about 1 mm. long; flowers usiially subumbel- 



late. 7. A. c'yUndrica. 



Heads of fruit rounded-oblong; styles about 2 mm. long; flowers truly cymose. 

 Petals greenish white, 1 cm. long or less; styl&s in fruit divergent. 



8. A. virginiana. 

 Petals white, 1.5 cm. long; styles suberect. 9. A. riparia. 



