CROWFOOT FAMILY 291 



Plant dioecious; flowers white, paniculate. 



Inflorescence usually longer than the leaves, its branches and the pedicels strongly 

 ascending; leaflets lanceolate or ovate-lanceolate; sepals oblanceolate. 



1. C. ligustici folia. 

 Inflorescence shorter than the leaves, its branches and the pedicels more spreading- 



leaflets broadly ovate, usually subcordate at the base; sepals spatulate. 



2. C. brevifolia. 

 Plant with perfect yellowish flowers, solitary in the axils. 3. C. orientalis. 



1. C. ligusticifolia Nutt. A woody vine, 3-6 m. high; leaves pinnately 

 5-7-foliolate; leaflets petiolate, in the typical form lanceolate to ovate, rounded 

 or truncate at the base, usually more or less acuminate, 3-8 cm. long, sparingly 

 strigose; cymes with nearly erect branches; sepals white, nearly 1 cm. long, ob- 

 long-oblanceolate; filaments of the staminate flowers linear-filiform, those of the 

 pistillate flowers broader, linear, somewhat dilated, with sterile anthers; achenes 

 numerous, obovate, pubescent; styles plumose, 4-5 cm. long. Very variable 

 species. Copses and canons among bushes: B.C. N.D. N.M. Calif. Plain 

 Submont. My-Au. 



2. C. brevifolia (Nutt.) Howell. A woody vine, 2-5 m. high, resembling 

 the last; leaves pinnately 5-7 fololiate; leaflets broadly ovate, acute at the apex, 

 usually cordate at the base, double-toothed, 2-5 cm. long, nearly glabrous, rather 

 firm; inflorescence subumbellate or corymbiform, with more spreading short 

 branches; sepals straw-colored, 8-9 mm. long; achenes obovate, pubescent; styles 

 plumose, 2-3 cm. long. Among bushes: Wash. Mont. 'Utah Ore. Sub- 

 mont. My-Jl. 



3. C. orientalis L. Climbing vine, 3-5 m. high; leaves twice or thrice ter- 

 nate; leaflets thin, shining, 3-parted with small, ovate, incised divisions; 

 sepals yellow, tinged with green, somewhat reflexed; styles plumose. C. 

 crux-flava Cockerell. (?) C. aurea Nels. & Macb. Among bushes: Ont. N.M. 

 Ida.; escaped from cultivation, native of India. 



6. VIORNA Reichenb. VASE-VINE, LEATHER-FLOWER, OLD MAN'S 

 WHISKERS AND LION'S BEARD (fruit). 



Climbing vines or (all ours) erect perennial herbs. Leaves opposite, in 

 ours pinnately compound or decompound. Sepals 4, rarely 5, valvate, petaloid, 

 bluish or purplish, erect and connivent at the base or throughout. Petals and 

 staminodia wanting. Stamens numerous, erect; anthers long and narrow, 

 pointed; filaments hairy. Pistils many. Fruit 1-seeded achenes, with long 

 persistent, in ours plumose styles. 



Sepals not or indistinctly dilated above. 



Calyx rounded-urceolate; sepals broadly ovate, merely the tips spreading. 



Leaf-segments ovate to ovate-lanceolate, 2-5 cm. long. 1. V. Scottii. 



Leaf-segments linear to lanceolate, 1-2 cm. long. 2. V. Bakeri. 



Calyx elongated-campanulate; sepals oblong-lanceolate, about one-fourth or more 



of their length spreading. 



Middle and upper leaves subsessile, thrice ternate; ultimate segments linear or 



linear-lanceolate. 3. V. hirsutissima. 



Middle and upper leaves distinctly petioled, twice ternate; ultimate segments 



lanceolate. 4. V. Wyethii. 



Sepals decidedly dilated at the apex. 



Sepals acute or short-acuminate; plant in age glabrate; leaf-segments lanceolate. 



5. V. Jonesii. 

 Sepals obtuse or merely acutish; plant permanently villous; leaf-segments linear. 



6. V. eriophora. 



1. V. Scottii (Porter) Rydb. Stem erect, 2-4 dm. high, more or less villous 

 when young; leaves twice pinnately divided, spreading; peduncles about 1 dm. 

 long; sepals purplish brown, 2.5-3.5 cm. long, more or less villous outside; achenes 

 obovate, flattened, densely short-pubescent; their styles 4-5 cm. long. Clematis 

 Scottii Porter. C. Douglasii Scottii Coulter. Hillsides: N.M. S.D. Wyo. 

 Submont. Mont. My-Jl. 



2. V. Bakeri (Greene) Rydb. Stem erect, 3^6 dm. high, simple, slightly 

 villous, strongly striate; leaves short-petioled, twice or thrice pinnate; sepals 

 dark purplish brown, villous outside, less than 2 cm. long; fruit unknown. C. 

 Bakeri Greene. Hillsides: Los Pinos, Colo. N.M. Submont. My. 



