156 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



58. RAinnSTCULACEAE. Crowfoot Family. 



Stem leaves all opposite or whorled (or only part of them opposite in Ficaria, with 



very short stems, the flowers often appearing to he on naked scapes). 



Leaves of the stem whorled, usually only a single whorl (sometimes 2 whorls in 



Anemone), sometimes reduced to sepal-like bracts borne at the base of the 



flower. 



Plants wholly glabrous; roots tuberous; flowers in a terminal umbel. Sepals 



white; leaves compound 7. SYNDESMON. 



Plants more or less hairy; roots fibrous; flowers solitary. 

 Basal leaves 3-lobed, the lobes rounded at the apex; stem leaves reduced to 3 



entire bracts borne at the base of the flower 6. HEPATICA. 



Basal leaves compound or with numerous lobes, the divisions acute; stem 

 leaves well developed, deeply lobed or compound, the flowers on long 



naked stalks 5. ANEMONE. 



Leaves of the stem opposite, usually of numerous pairs, never whorled. 

 Plants wholly glabrous; leaves heart-shaped, the blades much shorter than the 



petioles; roots fleshy; fruits not tailed 10. FICARIA. 



Plants more or less hairy; leaves never heart-shaped, sessile or the petioles much 

 shorter than the blades; roots not fleshy; fruits with long hairy tails. 

 Flowers panicled, the sepals 1 cm. long or shorter, spreading, thin. 



12. CLEMATIS. 

 Flowers solitary on long stalks, the sepals 1.5-3 cm. long, erect, the tips recurved, 



thick and leathery 13. VIORNA. 



Stem leaves all alternate, sometimes only one. 

 Flowers in racemes. Leaves compound or deeply lobed. 

 Flowers irregular, one of the sepals produced into a long spur; leaves not over 



10 cm. wide .3. DELPHINIUM. 



Flowers regular, none of the sepals spurred; leaves often 30 cm. wide or larger. 



1. CIMICIFUGA. 

 Flowers variously arranged, but never in racemes. 

 Flowers all or mostly on recurved stalks, blue or red and yellow; fruit a many- 

 seeded pod. 

 Leaves simple, deeply lobed; flowers blue, very irregular, one of the sepals 



large and hooded 4. ACONITUM. 



Leaves compound (except the uppermost), composed of slender-stalked leaf- 

 lets; flowers red and yellow, the sepals produced into long slender spurs. 



2. AQUILEGIA. 



Flowers on straight, erect or ascending stalks, yellow or white; fruit of acbenes. 



Petals present, yellow; basal leaves comparatively small, rarely 10 cm. wide. 



Leaves simple or compound 9. RANUNCULUS. 



Petals none, the sepals often petal-like, green or white; basal leaves large, 

 usually 20 cm. wide or larger. 

 Leaves simple, deeply lobed; flower stalks finely hairy. 



8. TRAUTVETTERIA. 

 Leaves compound, composed of numerous leaflets; flower stalks glabrous. 



11. THALICTRUM. 



1. CIMICIFUGA L. 



1. Cimicifuga racemosa (L.) Nutt. Black snakeroot. 



Rich woody; common. June-July. Eastern U. S. 



