292 RANUNCULACEAE 



3. V. hirsutissima (Piirsh) Heller. Stem simple, erect, 3-7 dm. high; 

 lower leaves petioletl, the earliest entire, the rest dissected, mostly thrice pinnate; 

 sepals brownish purple, 3-4.5 cm. long; achenes obliquely ovate, densely canes- 

 cent, their styles 5-6 cm. long. C. hirsutissima Pursh. C. Doughisii Hook. 

 Hillsides and valleys: Wash. — -Wyo. — Mont. Submont. — Mont. My-Je. 



4. V. Wyethii (Nutt.) Rydb. Perennial; stem simple, 2-4 dm. high, vil- 

 lous; leaves twice pinnately divided, with usually broader divisions than in the 

 preceding; sepals dark brownish purple, 2.5-3.5 cm. long, villous outside; achenes 

 obliquely ovate, canescent; their styles 3-5 cm. long. C. Wyethii Nutt. HilLs: 

 Mont. — ^Wyo. — ^Ida. Submont. — Subalp. Ap-Jl. 



5. V. Jonesii (Kuntze) Rydb. Stems 3-6 dm. high; leaves twice pinnately 

 divided, 1-1.5 dm. long, rather firm; segments 1-5 cm. long, acutish; calyx cam- 

 pan ulate, brown; sepals 2-2.5 cm. long, ovate, the upper half with wavy dilated 

 margins; achenes about 5 mm. long, densely silky; styles 4-5 cm. long. Clematis 

 Douglasii var. Jonesii Kuntze. Clematis plattensis A. Nels. Hillsides and 

 gulches: Colo. — Nev. Submont. — Mont. Je-Jl. 



6. V. eriophora Rydb. Stems and leaves prominently white-villous, the 

 former 3-5 dm. high; leaves distinctly petioled, twice pinnately divided; seg- 

 ments 1-3 cm. long; calyx villous, campanulate, about 3 cm. long; sepals oblong, 

 the upper third spreading with dilated margins; achenes oblong, about 6 mm. 

 long; tails about 4 cm. long. Foot-hiUs and canons: N.M. — Wyo. — Utah. Sub- 

 mont. My-Je. 



7. ATRAGENE L. Bell Rue, Purple Virgin's Bower. 



Perennial climbing or creeping vines. Leaves opposite, compoxind. Flowers 

 large and showy, solitary in the axils or at the end of the branches. Sepals 

 large, petal-like, mostly membranous, blue or purple, spreading from the base. 

 Petals or staminodia small, spatulate, usually present. Stamens numerous, 

 spreading; filaments pubescent, the outer ones dilated; anthers short. Pistils 

 many. Fruit 1-seeded achenes, with persistent, long, plumose styles. 



Leaves merely ternate. 



Staminodia usually decidedly spatulate; leaflets variously toothed or cleft, not long- 

 acuminate. 

 Lobes or teetli of the leaves rounded or obtuse at the apex ; sepals ovate. 



1. A. diversiloba. 

 Lobes or teeth of the leaves acute or acuminate; sepals lanceolate. 



2. A. grosseserrata. 

 Staminodia linear or none; leaflets entire or crenate above the middle, long-acuminate. 



3. A. Columbiana. 

 Leaves twice or thrice ternate; staminodia usually linear or lacking. 



Secondary leaflets merely toothed or cleft. 



Secondary leaflets broadly ovate, with broadly ovate teeth. 4. A. repens. 



Secondary leaflets lanceolate, with lanceolate or ovate-lanceolate lobes or teeth. 



5. A. pseudoalpina. 

 Secondary leaflets divided to near the midrib. 6. A. tenuiloba. 



1. A. diversiloba Rydb. A low vine; leaves glabrous or slightly hairy when 

 yovmg, ternate; leaflets ovate in outline, obtuse, 1-3 cm. long, the lateral ones 

 usually 2-cleft, the terminal one 3-cleft; sepals red-purple, lanceolate, about 2.5 

 cm. long; staminodia about 15 mm. long, acute. Mountains: near Denver, Colo. 

 Submont. Au. 



2. A. grosseserratr., Rydb. Trailing or climbing over bushes; leaves ternate; 

 leaflets broadly ovate, oblique, somewhat cordate at the base, 3-4 cm. long, 

 coarsely toothed and often somewhat lobed; sepals about 4 cm. long, 10-13 mm. 

 wide, acute; staminodia about 18 mm. long, a httle exceeding the stamens; 

 achenes small, sparingly hirsute; styles about 3 cm. long, plumose throughout. 

 Mountain meadows among bushes: Ida. — Mont. — 'Wash. Submont. — Mont. 

 Je. 



3. A. Columbiana Nutt. Rather tall vine, climbing over bushes; leaves 

 ternate; leaflets thin, 3-10 cm. long, obliquely cordate at the base; sepals purple 

 or blue, 3-5 cm. long, lanceolate, aciuninate; achenes rather densely pubescent; 

 styles plumose, 4-5 cm. long. A. occidentalis Rydb., not Hornem. Clematis 



