256 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
13. CLEMATIS L. Virarn’s Bower. 
Perennial, more or less woody vines; flowers small, numerous, paniculate, dicecious 
or the pistillate with a few sterile stamens; sepals petal-like, white, thin, spreading; 
petals wanting. 
KEY TO THE SPECIES, 
Tails of the carpels 7 to 10 cm. long; panicle with few (usually less 
than 10) flowers; leaflets small, 30 mm. long or less........ 1. C. drummondii. 
Tails of.the carpels 4 cm. long or less; panicle many-flowered; 
‘leaflets 35 to 70 mm. long. 
Leaflets loosely pubescent on both surfaces, acute, never long- 
attenuate, the lobes coarsely crenate with obtuse teeth; 
achenes attenuate to the tails..........2....2-2....... 2. C. neomexicana. 
Leaflets usually entirely glabrous, mostly long-attenuate, the 
lobes incised with acute teeth or entire; achenes abrupt- 
ly contracted into the tails..................2.-.----- 3. OC. ligusticifolia. 
1. Clematis drummondii Torr. & Gray, Fl. N. Amer. 1: 9. 1838. 
TYPE LOCALITY: Texas. 
RanaeE: Texas to Arizona, south into Mexico. 
New Mexico: Tortugas Mountain; Organ Mountains; Otis. Dry hills and canyons, 
in the Lower Sonoran Zone. 
The native name is “‘barba de chivo.”’ 
2. Clematis neomexicana Woot. & Stand]. Contr. U. 8S. Nat. Herb. 16: 122. 1913. 
Type Locauity: San Luis Mountains, New Mexico. Type collected by E. A. 
Mearns (no. 2136). 
Rance: Southwestern New Mexico and adjacent Arizona and Mexico. 
New Mexico: San Luis Mountains; Organ Mountains. Dry canyons in the moun- 
tains, Upper Sonoran Zone. 
3. Clematis ligusticifolia Nutt.; Torr. & Gray, Fl. N. Amer. 1: 9. 1838. 
TyprE Loca.ity: ‘‘Plains of the Rocky Mountains.’’ 
RanaeE: British America to California and New Mexico. 
New Mexico: Common, except on the plains of the eastern part of the State. 
Lower and Upper Sonoran zones. 
Clematis orientalis L. (Clematis crux-flava Cockerell!) is sometimes cultivated in 
New Mexico, and is reported to have escaped near Las Vegas. The nature of the 
plant is such, however, that it is not likely to become a permanent part of our flora. 
14. VIORNA: Reichenb. LEATHER FLOWER. 
Herbaceous or woody perennials with erect or climbing stems; leaves pinnate; flow- 
ers large, solitary on long peduncles, usually nodding; sepals thick, erect, mostly dull 
purple; petals none; anthers linear. 
KEY TO THE SPECIES. 
Stems herbaceous, erect; plants mostly 1-flowered. 
Sepals conspicuously dilated at the apex; plants permanently vil- 
CO) 1. V. eriophora. 
Sepals not dilated; plants glabrate in age. 
Plants stout; leaf segments large, 20 to 40 mm. long.....-.. 2. V. scottit. 
Plants slender; leaf segments small, 5 to 15 mm. long....... 3. V. bakeri. 
1 Science n. ser. 10: 898. 1899. 
