RANUNCULACEAE (BUTTERCUP FAMILY) 197 



9. Anemone stylosa A. Nels. Bot. Gaz. 42: 52. 1906. Low from a thickened 

 simple or branched caudex, densely covered with the dead sheathing petioles: 

 basal leaves pale green, glabrous, biternate, segments 3-parted, again incised 

 into linear-lanceolate acute lobes; involucral leaves short-petioled, otherwise 

 quite similar: stems and petioles sparsely long-pilose, the hairs spreading or 

 refracted: sepals oval or oblong, purplish-red or greenish-red: achenes pubes- 

 cent, with rather long straight glabrous persistent styles, hooked at the tip. 

 Only as yet from type locality, Fish Lake, Utah. 



8. PULSATILLA Adans. PASQUE FLOWER 



Characters nearly the same as for Anemone, except that the styles are always 

 persistent and become greatly elongated and plumose. Anemone in part. 



1. Pulsatilla hirsutissima (Pursh) Brit. Ann. N. Y. Acad. Sci. 6: 1891. 

 Villous with long silky hairs: flower erect, developed before the leaves, which 

 are ternately divided, the lateral divisions 2-parted, the middle one stalked 

 and 3-parted, the segments deeply once or twice cleft into narrowly linear 

 and acute lobes: sepals 5-7, purplish or whitish. Anemone patens Nuttalliana. 

 From the mountains eastward to Illinois and Wisconsin; the state flower 

 of South Dakota. 



9. CLEMATIS L. VIRGIN'S BOWER 



Perennial herbs, either climbing or upright, with opposite leaves, enlarged 

 nodes, and usually showy flowers (large and solitary or smaller and clustered). 

 Sepals 4 or rarely more, valvate, petal-like. Petals none, sometimes the 

 outer stamens sterile, with the filaments broadened and petaloid. Stamens 

 many. Pistils numerous, becoming achenes tailed with feathery or hairy or 

 rarely naked styles. 



Petals none; stamens with adnate anthers. 

 Stems erect; leaves pinnate or pinnatifid. 



Leaves pinnate; the leaflets all petiolulate . . . . . 1. C. plattensis. 

 Leaves twice or thrice pinnatifid. 



Petiolules of leaves straight (not contorted). 



Low and white-villous . . . . . . . 2. C. eriophora. 



Taller and sparsely villous 



Petiolules of some of the leaves contorted as if for climbing 

 Stems climbing; leaves ternate or pinnately 5-foliolate . 

 Petals none; some of the outer stamens petaloid and sterile; stem 



climbing or sometimes low. 



Leaves ternate, entire or merely toothed .... 

 Leaves biternate, incisely toothed or lobed .... 



3. C. Douglasii. 



4. C. Scottii. 



5. C. ligusticifolia. 



6. C. occidentals. 



7. C. pseudoalpina. 



1. Clematis plattensis A. Nels. Bot. Gaz. 42: 52. 1906. Stems clustered 

 on the crown of a thick woody root, 12-18 cm. high, terminated by the single 

 stout peduncle of nearly equal length in fruit, sparsely short- villous : basal 

 leaves small, scale-like and entire; foliage proper of about 3 pairs of nearly 

 simple-pinnate short-petioled leaves; pinnae 7-9, the lowest pair sometimes 

 ternate, all distinctly petiolulate (petiolule 3-10 mm. long) and oblong- 

 lanceolate, entire, and (in age) merely ciliate-villous: achenes long-tailed, 

 hairy-plumose: flowers not known, presumably much like those of C. Doug- 

 lasii. Eastern Wyoming, in the canon of the Platte. 



2. Clematis eriophora Rydb. Bull. Torr. Bot. Club 29: 154. 1902. Promi- 

 nently white-villous: stems 2-4 dm. high, simple: leaves 5-10 cm. long, dis- 

 tinctly petioled, twice pinnately divided; ultimate segments narrowly linear: 

 flowers nodding: calyx villous, campanulate, about 3 cm. long: sepals oblong, 

 obtuse, the upper third spreading, with a dilated margin: achenes silky, then* 

 tails long and plumose. In mountain canons; Colorado. 



3. Clematis Douglasii Hook. Fl. Bor. Am. 1: 1. pi. 1. 1829. Stem simple 

 or branching, more or less villous, woolly at the joints: leaves pinnate to 2- 

 or 3-pinnatifid; the leaflets linear or linear-lanceolate: sepals thick, deep pur- 

 ple within, paler externally, woolly at the apex, and spreading: achenes silky, 



