3. Ranunculaceae 51 



12. Flowers solitary; leaflets mucronulate; carpels 3- 

 4, each 2- to 3-ovuled, becoming divaricate, 

 slender-beaked follicles 5 mm long; style 

 present; roots not at all or only slightly 



thickened 3. Isopyruni 



12. Flowers usually 3 or 4 in an umbel; leaflets not 

 mucronulate; carpels 4-15, each 1-ovuled, be- 

 coming ribbed achenes 8-12 mm long at matur- 

 ity; stigma sessile; roots tuberous-thickened 



13. Anemonella 



3. Flowers red, blue-purple, or greenish. 



13. Leaves entire, basal, linear; sepals minutely spurred at base; recep- 

 tacle becoming conspicuously elongated 8. Myosurus 



13. Leaves lobed, parted, or compound. 



14. Flowers red, spurred, nodding so that the five spurs point up- 

 ward; stamens exserted ; anthers yellow 4. Aquilegin 



14. Flowers not red. 



15. Flowers spurred, blue; leaves alternate 7. Delphinium 



15. Flowers spurless. 



16. Leaves pedate; flowers solitary, nodding 14. Helleborus 



16. Leav'es not pedate; flowers usually not solitary. 

 17. Leaves alternate. 



18. Leaves simple, palmately lobed; flowers all perfect. 

 19. Flowers solitary, subtended by 3 small sessile 



bracts simulating a calyx; sepals 6-12 



15. Hepatica 



19. Flowers corymbose; involucres none; sepals 3- 



5, usually 4 11. Trautvetteria 



18. Leaves ternately compound; flowers polygamous or 



plants dioecious 10. Thaliclrum 



17. Leaves not alternate; flowers solitary. 



20. Leaves (of the stem) whorled, dissected 



12. Anemone 



20. Leaves opposite 16. Clematis 



1. Caltha L. — Marsh-marigold 



C. palustris L. Wet ground, n. and central 111., southward to 

 Christian, Shelby, and Coles counties. Apr. -May. 



2. Hydrastis Ellis — Goldenseal 

 H. canadensis L. Woods, not common. Apr. -May. 



3. Isopyrum L. — False Rue Anemone 

 /. hiternatum (Raf.) Torr. & Gray. Moist woods, common 

 throughout 111. Mar.-May. 



4. Aquilegia L. — Columbine 

 1. Flowers scarlet and yellow; spurs straight; wooded ravines. 



throughout 111. Apr.-June. [A. coccinea Small] ....A. canadensis L. 

 1. Flowers blue, purple, pink, or white; spurs strongly hooked; some- 

 times escaped from cultivation, but not established in 111. 

 Garden Columbine A. vulgaris L. 



