STANDLEY — FLORA OF GLACIER PARK. 343 



The leaves are graceful and handsome, and in a vague way suggest those of the 

 maidenhair fern, with which the plant is frequently confused in the West; in autumn 

 they turn yellow. The flowers are not conspicuous. Our material is rather variable,, 

 and some of it might be referred to T. coluvibianum Rydb. 



2. Thalictrum occidentale A. Gray. Avalanche Lake, on brushy slopes. B. C. 

 to Calif., Utah, and Alta.— Stems 50 to 80 cm. high; leaflets 1.5 to 5.5 cm. wide, 

 3-lobed and with rounded teeth; achenes 6 to 8 mm. long. 



11. PULSATILLA Adans. 



Perennial herbs; leaves borne at the base of the stem, divided into numerous 

 narrow lobes; stem bearing 3 whorled bracts similar to the leaves; flowers usually 1 

 to a stem, with 5 to 7 colored sepals and no petals; fruit of numerous achenes, each 

 with a long hairy tail. 



Flowers purple or bluish; bracts sessile 1- P. ludoviciana. 



Flowers white, sometimes tinged with purple; bracts short-stalked. 



2. P. occidentalis. 



1. Pulsatilla ludoviciana (Nutt.) Heller. Pasque-flower. Frequent on the 

 east slope at low altitudes, on praiiie or open hillsides. B.C. and Wash, to Tex. and 

 Ill._Stem8 10 to 40 cm. high; leaves very hairy, 5 to 10 cm. long; sepals ovate- 

 oblong, 2.5 to 3.5 cm. long. 



The plants bloom in spring. 



2. Pulsatilla occidentalis (S. Wats.) Freyn. Chalice-flower. Frequent in a 

 few places above limber line, in low meadows; also at Grinnell Lake. Alaska to 

 Calif., Mont., and Alta. (Anemone occidentalis S. Wats.)— Stems short at flowering 

 time, but becoming 30 to 60 cm. high; leaves 3-parted, the divisions pinnately divided 

 into numerous lobes, green, thinly hairy; sepals 2 to 2.5 cm. long; tails of the fruit 

 silky, bent downward in fniit, the head of fruit broad above and narrow below. 



The plants bloom early, but they are very handsome even in fruit. The soft, 

 silky heads are most attractive. 



12. ANEMONE L. Anemone. 



Perennials with rootstocks; leaves basal, deeply lobed or parted; stem bearing 3 

 leaflike bracts; flowers few or solitary; sepals 4 or more, usually 5, petal-like; petals 

 none; fruit a head of woolly achenes. 

 Leaves divided into 3 broad wedge-shaped leaflets, these toothed or with few short 



broad lobes !• A- parviflora. 



Leaves 2 to 4 times divided into numerous narrow Icl^es. 



Leaves nearly glabrous, the lobes obtuse; style 2 to 3 mm. long . 2. A. tetonensis. 



Leaves hairy, the lobes acute: style 1 to 2 mm. long 3. A. globosa. 



1. Anemone parviflora Michx. Northern anemone. Frequent above timber 

 line, in meadows or on rocky slopes; also in cold bog below Lake McDermott. Alaska 

 to Colo., Ont., and Lab.; also in Asia.— Stems slender, 5 to 20 cm. high; 1-flowered; 

 leaflets 1 to 2 cm. long, thinly hairy beneath ; sepals 8 to 12 mm. long, white or tinged 

 with blue 



2 Anemone tetonensis Porter. Alpine anemone. Frequent above timber line, 

 in meadows and on rock slides. B. C. and Wash, to Wyo. and Alta.-Stems 10 to 20 

 cm. high, mostly 1-flowered; leaves 1.5 to 3 cm. long; sepals 6 to 12. mm. long, bluish 

 white or pale blue; fruit heads 1 to 1.5 cm. long. 



3. Anemone globosa Nutt. Common western anemone. Common above timljer 

 line in meadows or on rock slides; sometimes at low or middle elevations, in meadows 

 or thickets. Alaska to Calif., N. Mex., and S. Dak.-Stems 15 to 40 cm. high, hairy, 

 1 to 3-flowered; leaves 3 to 5 cm. long; sepals 6 to 12 mm. long, yellowish withm, blue 

 or purplish outside; fruit heads about 1 cm. in diameter. 



