KEY TO THE SPECIES 25 



2. Anemone globosa Nutt. (Round-feuited Anemone). Stems slender, 1-3 

 dm. high, silky, as are also the leaves, which are dissected into narrow lobes ; 

 flowers 1 or more ; the sepals red or dull crimson, 6-10 mm. long ; the oblique, 

 pointed, densely woolly achenes in a globose head. 



6. PULSATILLA (Pasque Ploweb) 



Perennial herbs, from thick semi-woody roots, densely soft hairy throughout ; 

 stems scapose and 1-flowered ; sepals petal-like ; stamens very numerous and the 

 achenes with long feathery tails. 



1. Pulsatilla hirsutlssima (Pursh) Britt. (American Pasque Flower). 

 Leaves all radical, dissected, the divisions narrow ; stems naked but for the dis- 

 sected involucre, which is some distance below the single large flower, the blossoms 

 opening before the leaves appear ; sepals large, ovate-oblong, purplish, varying to 

 nearly white. In early spring, in moist canons and on wooded slopes. 



7. CLEMATIS (Virgin's Bower) 



Perennial herbs or semi-woody climbers with opposite, petioled, pinnately 

 compound or parted leaves ; the genus is easily recognized by Its 4 valvate sepals 

 and the long-tailed achenes. 



1. Clematis llgustlcifolia Nutt. (Western Virgin's Bower). Stem climb- 

 ing, more or less woody ; leaves mostly pinnately 5-foliate, the leaflets incisely 

 toothed or trifld, nearly glabrous ; the white flowers in leafy panicles ; sepals 

 equaling the stamens. Clambering over bushes on creek banks. 



3. Clematis Douglasii Hook. (Douglas's Clematis). An erect, tufted, 

 somewhat villous herb, 3-6 dm. high ; leaves pinnatifld, the divisions linear or 

 linear-lanceolate ; sepals 3-4 cm. long, thick, deep purple within, paler on the out- 

 side, valvate, only the villous tips spreading ; achenes silky, with tails 8-3 cm. long. 

 Moist slopes in open woods. 



8. ATRAGENE (Virgin's Bower) 



Climbing vines much like Clematis ; of the numerous stamens, a few of the 

 outer ones have the fliaments broadened (petal-like); sepals large and showy; the 

 long styles plumose 



1, Atragene Americana Sims (Purple Virgin's Bower). Leaves trifo- 

 liate, with thin, ovate, acute leaflets ; the four large sepals widely spreading, 

 thin, strongly veined, and pubescent on the veins and margins. Moist wooded 

 hillsides. 



9. RANUNCULUS (Buttercup) 



Herbs with alternate leaves, solitary or clustered yellow (sometimes white) 

 flowers, 5 sepals, 5 (rarely more) flat petals, numerous stamens, and numerous 

 pistils becoming a head of mostly flattened and pointed achenes. (See Plant 

 Structures, p. 222, Fig. 202.) 



» Radical leaves undivided ; low (mostly less than 15 cm.). 



1. Banunculus elllpticus Greene (Bright-faced Buttercup). Stems 5-10 



cm. high, 1-several-flowered ; leaves smooth ; the root-leaves entire, mostly 



elliptic ; the stem-leaves few, generally 3-cleft to about the middle ; flowers large, 



18-25 mm. across ; the petals twice as long as the sepals, bright yellow, glossy 



3 



