196 RANUNCULACEAE (BUTTERCUP FAMILY) 



Achenes pubescent only or glabrate. 

 Leaves of the involucre sessile. 



Achenes appressed-pubescent 5. A. canadensis. 



Achenes wnolly glabrous . . . . . 6. A. zephyra. 

 Leaves of the involucre petioled. 



Stems from horizontal or ascending rootstocka . . . . 7. A. quinquefolia. 

 Stems from an erect caudex. 



Styles deciduous 8. A. tetonensis. 



Styles persistent 9. A. stylosa. 



1. Anemone parviflora Michx. Fl. Bor. Am. 1: 319. 1803. Sparingly softly 

 hirsute: the stems low, 4-10 cm. high, the solitary peduncles, in fruit, often 

 longer: rootstock slender: root-leaves 3-parted, their broadly cuneate seg- 

 ments crenately lobed or toothed; involucral leaves nearly sessile, their seg- 

 ments more deeply lobed : sepals 5 or 6, oval, white : head of fruit globular. 

 Mountains of Colorado, northward to the Arctic sea. 



2. Anemone lithophila Rydb. Bull. Torr. Bot. Club 29: 152. 1902. Spar- 

 ingly pubescent with long silky hairs: stems 1 or more from a short erect root- 

 stock: leaves ternate, the obovate-cuneate segments once or twice 3-cleft or 

 lobed, the lobes oblong: involucral leaves subsessile and similar: sepals silky, 

 ochroleucous, tinged with blue, broadly obovate or oval: achenes densely vil- 

 lous. Utah and Montana, probably Wyoming and Idaho. 



3. Anemone globosa Nutt. ex Pritz. in Linnaea 15: 673. 1841. Silky 

 hairy, 1-3 dm. high: basal leaves long-petioled, 3-5-parted, the segments 

 cleft into linear acute lobes; involucral leaves short-petioled : sepals 5-9, red, 

 rarely yellow, oval or oblong, silky or downy beneath. A. multifida. Fre- 

 quent in the central Rocky Mountains. 



4. Anemone cylindrica Gray, Ann. Lye. N. Y. 3: 221. 1836. Tall and 

 clothed with silky hairs: flowers 2-6, on very long and upright naked pe- 

 duncles: leaves of the involucre long-petioled, twice or thrice as many as the 

 flower stalks, 3-divided, their divisions wedge-shaped, the lateral 2-parted, 

 the middle one 3-cleft, lobes cut and toothed at the apex: sepals greenish- 

 white: head of fruit cylindrical. From Colorado to Bitter Root valley and 

 thence eastward across the continent. 



5. Anemone canadensis L. Syst. Ed. 12. 3: App. 231. 1768. Hairy, rather 

 low: involucres sessile; the primary ones 3-leaved, bearing a naked peduncle, 

 and soon a pair of branches or peduncles with a 2-leaved involucre at the 

 middle, which branch similarly in turn; their leaves broadly wedge-shaped, 

 3-cleft, cut and toothed; radical leaves 5-7-parted or cleft: sepals 5, obovate, 

 white: carpels orbicular. A. dichotoma. Common along streams; eastern 

 Colorado and Wyoming and eastward. 



6. Anemone zephyra A. Nels. Bot. Gaz. 42: 51. 1906. Green but sparsely 

 long-pilose: stems 1 or more from the thick erect caudex, 7-15 dm. high, 

 rather stout: basal leaves petioled, ternate, the broad petiolulate segments 

 mostly deeply 3-cleft, and these segments in turn deeply incised into linear- 

 oblong lobes; involucral leaves sessile, with linear-oblong lobes: flowers large, 

 2-3 cm. broad, lemon-yellow or ochroleucous, usually solitary and rather long 

 pedunculate, sometimes umbellately 2-4-flowered : achenes large, glabrous, 

 obovate, tapering to a stipe-like base, tipped with the short hooked style. 

 A. narcissiflora. Subalpine or alpine in the central Rocky Mountains. 



7. Anemone quinquefolia L. Sp. PI. 541. 1753. Smooth or somewhat 

 villous: stem perfectly simple from a filiform rootstock, slender, leafless, ex- 

 cept for tin - involucre of 3 long-petioled trifoliolate leaves; their leaflets wedge- 

 shaped ,,r oblong, toothed or cut, or the lateral ones 2-parted; a similar rad- 

 ic;il leaf in sterile plants solitary from the rootstock: sepals 4-7, oval, white 

 or pinkish: achenes oblong, with a hooked beak. A. nemorosa. Scarcely 

 within our ran^e; northward and eastward. 



8. Anemone tetonensis Porter, Brit. N. Y. Acad. Sci. 6: 224. 1891. Much 



i/lo/iuxa, hut lower and more slender: leaf-segments somewhat broader, 

 ol>tu-i-h, glabrate: flowers deep purple: achenes dorsally glabrate. In the 

 hi^h mountains of northwest Wyoming and extending into Idaho and Mon- 





