KEY. 131 



The flower-stalk becomes upright in fruit. Leaves twice- to 

 thrice- ternately compound, the leaflets lobed. 



Aquilegia Canadensis, L. 



Petals 4, une'qual ; 2 of them spurred and included 

 in the spur of the uppermost sepal. Pistils 1-5, becoming 

 many-seeded follicles. Leaves palmately divided, or in- 

 cised. Flowers blue or purplish, in terminal simple or com- 

 pound racemes. Delphinium. 



4:3. Petals 2, long-clawed, covered by the hooded upper- 

 most of the 5 sepals, the 3 lower petals wanting or rudimen- 

 tary. Pistils 3-5. Leaves palmately cleft or dissected. 

 Flowers blue (or white), in simple or compound racemes. 



Acouitum. 

 Petals several, small, or minute 44 



44. Petals 2-horned, or 2-lipped 45 



Petals linear or club-shaped, small, or stamen-like. 4 6 



45. Leaves ternately decompound. Petals 2-horned. 

 Pistils 1-8. Flowers white, in long racemes. 



(18) Cimlcifuga. 

 Leaves pedately divided or parted. Petals 8-10, 

 very small, tubular, 2-lipped. Pods many-seeded. Flowers 

 nodding, large, greenish. Peduncles often in pairs. 



Helleboxns viridis, L. 



46. Petals hollowed near the base, linear, 15-25, much 

 shorter than the stamens. Pods 9-15, sessile. Leaves pal- 

 mately parted, or incised. Flowers solitary, terminal, large, 

 pale greenish-yellow. Trollius laxus, Salisb. 



Petals hollowed at the apex, club-shaped. Pods 

 8-V, stalked, divergent, and pointed with the style. Leaves 

 all radical, 3-foliolate, obscurely 3-lobed and toothed. 

 Scapes with a solitary, star-like, white flower. 



Coptis trifolia, Salisb. 



47. (25) Anthers opening outward. Carpels indehis- ' 

 cent, falling away whole and separately, when ripe, from the 

 long axis. Trees. Leaves long-petioled, truncate at the 

 end and laterally 2-lobed. Flowers bell-shaped_, greenish- 

 yellow, marked with orange. Iiiriodendron tulipifera, L. 



Anthers opening inward, longer than the filaments. 



