27a. Roots fibrous; plants of wet soil 



Buttercup, Ranunculus septentrionalis. 

 27b. Roots thickened; plants of dry woods or thickets 



Buttercup, Ranunculus hispidus. 



28a. Leaves dissected into numerous narrowly linear acute di- 

 visions (4 7 dm. high; flowers large, bluish, in summer) 



Love-in-a-mist, Nigella damascena, 



28b. Leaves lobed or divided, but the divisions not separated by 

 definite stalks 29. 



28c. Leaves truly compound, all their divisions separated by 

 distinct stalks 39. 



29a. Leaves all basal, their lobes (usually 3) entire (12 dm. high; 



flowers pink-purple, in earliest -spring) (Hepatica) 30. 

 29b. Lobes of the leaf serrate or incised 31. 



30a. Lobes of the leaf obtuse or rounded 



Hepatica, Hepatica triloba. 

 30b. Lobes of the leaf acute Hepatica, Hepatica acutiloba, 



31a. Petals none; sepals 3, usually falling away as soon as the 

 flower opens (2 4 dm. high; flowers greenish-white, in 

 spring) Golden Seal, Hydrastis canadensis. 



31b. Petals none; sepals petal-like, 4 or more (Anemone) 32. 



31c. Petals present, but much smaller than the 5 petal-like sepals 

 38. 



32a. Stem-leaves sessile or nearly so 33. 

 32b. Stem-leaves on definite petioles 35. 



33a. Ovary tipped with a long slender hairy style; flowers bluish-pur- 

 ple (1 4 dm. high; early spring) 



Pasque Flower, Anemone patens Tar. wolfgangiana. 

 33b. Ovary with a short style, densely woolly; flowers red, green- 

 ish, or white (1 4 dm. high; late spring and summer) 34. 

 33c. Ovary tipped with a short style, glabrous or nearly so; flowers 

 white (4 7 dm. high; late spring and early summer) 



Anemone, Anemone canadensis. 



34a. Stem 1-flowered, sepals white 



Anemone, Anemone parviflora, 

 34b. Stem 3-flowered; sepals usually red 



Anemone, Anemone nmltifida. 



35a. Achenes densely woolly; flowers appearing in summer 36. 

 35b. Achenes merely pubescent; stems 1-flowered; woodland species 

 blooming in early spring (1 2 dm. high; flowers white) 



Wood Anemone, Anemone quinquefolia. 



