186 University of California Publications in Botany [Vol. 9 



24. EANUNCULACEAE (Buttercup Family) 



Apetalous (Actaea often has apetalous flowers but may be distinguished by the 

 fruit developing as a berry, not as an achene nor as a follicle). 

 Leaves divided or deeply lobed; fruit an achene. 

 Leaves alternate. 



Leaves palmately divided into 5-7 lobes; sepals white (petaloid) 



1. Trautvetteria 



Leaves 2-3 times ternately compound; sepals herbaceous (not petaloid) 



2. Thalictrum 



Leaves opposite or whorled 3. Anemone 



Leaves undivided; fruit a follicle 4. Caltha 



Petals present. 

 Flowers irregular. 



Upper sepal spurred; petals 4 5. Delphinium 



Upper sepal forming a helmet-shaped hood; petals 2 6. Aconitum 



Flowers regular. 



Flowers with long backward spurs formed by the always 5 petals 



7. Aquilegia 



Flowers without spurs; petals indefinite in number, usually more than 5. 



Fruit a berry; flowers white 8. Actaea 



Fruit a follicle; flowers dark red 9. Faeonia 



Fruit an achene; flowers yellow 10. Ranunculus 



1. TRAUTVETTERIA 



1. Trautvetteria grandis Nutt., in T. and G., Fl., vol. 1, p. 37. 



1838. 



Type locality. — "Shady woods of the Oregon." 



Range. — Wasliington and British Columbia south to the northern 

 Sierra Nevada. Also in New Mexico, according to Wooton and Stand- 

 ley. 



Zone. — Canadian. 



Specimen examined. — Mill Creek, Plumas County, Mrs. R. N. 

 Austin in 1877. 



In 1912 Dr. Greene published- an article on "New Species of 

 Trautvetteria" (Leaflets, vol. 2, pp. 190-193) ; among the descriptions 

 is one (p. 191) having as its basis the plant of Mrs. Austin's, the new 

 name being "Trautvetteria rotundata," an exact synonym. 



2. THALICTRUM 



Flowers perfect; upper leaves sessile 1. T. sparsiflorum 



Flowers dioecious or polygamo-dioecious; upper leaves petioled. 



Achenes %g~^/4 inch long; leaflets firm 2. T. Fendleri 



Achenes 4ic~% inch long; leaflets thin 3. T. occidentale 



1. Thalictrum sparsiflorum Turcz., in F. and M., Ind Sem. Petrop., 

 vol. 1, p. 40. 1835. 



Type locality. — Not ascertained. 



Ram.ge. — Subarctic America south to California and Colorado. 



Zone. — Canadian. 



