RANUNCULACEAE. 141 



9. CLEMATIS L. VIRGIN'S BOWER. 



i. Clematis ligusticifolia Nutt. Among bushes and in canons from N. D. 

 to B. C, Mo. and Calif. Alt. 4000-8000 ft. Log Canon; Poudre River, near 

 Ft. Collins; Rist Canon; Redstone; Narrows; Deer Run; Ft. Collins; near 

 Ouray; Manitou ; Cucharas Valley, near La Veta; Piedra; Arkansas Valley; 

 Salida; Durango; plains, Colorado Springs. 



10. VIORNA Reichenb. LEATHER-FLOWER, VASE-VINE. 



Sepals not at all or very slightly dilated above. 



Divisions of the leaves ovate or ovate-lanceolate, 2-5 cm. long. i. V. Scottii. 



Divisions of the leaves linear to lanceolate, 1-2 cm. long. 2. V . Bakeri. 

 Sepals conspicuously dilated at the apex. 



Sepals acute or short-acuminate ; plant in age glabrate ; divisions of the leaves 



lanceolate. 3- V- Jonesii. 



Sepals obtuse or merely acutish ; plant permanently villous ; divisions of the 



leaves linear. 4- V- eriophora. 



1. Viorna Scottii (Porter) Rydb. (Clematis Scottii Porter; C. Douglasii 

 Scottii Coulter) In open woods and on hillsides from S. D. to Wyo. and 

 N. M. Alt. 4000-9000 ft. Vicinity of Dillon Canon ; Trinidad; La Veta; 

 Veta Pass ; Poverty Ridge, near Cimarron ; Grizzly Creek ; La Plata River 

 Valley, near Hesperus Post Office ; Canon City. 



2. Viorna Bakeri (Greene) Rydb. (Clematis Bakeri Greene) In moun- 

 tains of Colo. Alt. about 7000 ft. Los Pinos ; Camp Creek, Larimer Co. 



3. Viorna Jonesii (Kuntze) Rydb. (Clematis Douglasii Jonesii Kuntze) 

 On hillsides and in canons from Colo, to Nev. Alt. 5000-9000 ft. Howe's 

 Gulch, near Ft. Collins; vicinity of Ouray; Dolores; Cimarron; Dixon Canon ; 

 foot-hills near Boulder. 



4. Viorna eriophora Rydb. (Clematis eriophora Rydb.) In the foot-hills 

 of Colo., Utah and Wyo. Alt. 4000-7000 ft. Foot-hills, Larimer Co.; gulch 

 west of Dixon Canon ; Howe's Gulch ; Rist Caiion ; Horsetooth Gulch ; Ft. 

 Collins ; Clear Creek ; mesas near Colorado Springs ; mountains near Golden 

 City; Pagosa. 



ii. ATRAGENE L. BELL-RUE, PURPLE VIRGIN'S BOWER. 



Leaves merely ternate. 



Staminodia usually decidedly spatulate ; leaflets toothed or cleft ; teeth and apex 

 rounded. 3. A. diversiloba. 



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

 acuminate, i. A. occidentalis. 

 Leaves twice or thrice ternate ; Staminodia linear or lacking. 



Secondary leaflets merely toothed or cleft. 2. A. pseudalpina. 



Secondary leaflets divided to near the base. 4. A. tenuiloba. 



1. Atragene occidentalis Hornem. (A. Columbiana Nutt.; Clematis vcrti- 

 cillaris Coult, in part) In mountain woods from Mont, to B. C., Colo, and 

 Utah. Alt. 5000-7000 ft. Foot-hills, Larimer Co. ; Howe's Gulch ; gulch east 

 of Stove Prairie; Rist Cafaon; Baxter's ranch; Ft. Collins; Four-Mile Hill, 

 Routt Co. ; Empire ; Camp Creek, Larimer Co. 



2. Atragene pseudalpina (Kuntze) Rydb. (Clematis alpina occidentalis 

 A. Gray; not A. occidentalis Hornem.) On hillsides, among bushes and in 



