324 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



3. Sepals thick, erect or connivent, dull or purplish brown, conspicuously white- 



lanate, at least on the margins; stamens erect: Section Viorna (4). 



4. Leaf segments narrowly lanceolate to nearly filiform, less (commonly 



much less) than 10 mm. wide; leaves bipinnate or occasionally ternate; 



stems mostly erect, unbranched, and 1-flowered; herbage villous to 



glabrate (5). 



5. Petioles ascending; leaflets lanceolate; sepals 3 cm. long or 



longer 4. C hirsutissima. 



5. Petioles spreading; leaflets linear-lanceolate to nearly filiform; sepals 



2 to 2.5 cm. long 5. C. arizonica. 



4. Leaf segments oblong-lanceolate to nearly orbicular, commonly more than 

 10 mm. wide; leaves simply pinnate or occasionally bipinnate, the 

 divisions few-toothed or cleft; stems mostly climbing or reclining, 

 branched, and bearing more than one flower; herbage sparsely pubes- 

 cent or glabrate; sepals 2.5 to 4 cm. long (6). 



6. Leaves slightly paler but not glaucous beneath; leaflets oblong or oblong- 



ovate, with acutish lobes and teeth 6. C. BIGELOVII. 



6. Leaves glaucous beneath; leaflets broadly ovate or suborbicular, with 

 obtuse or rounded lobes and teeth 7. C. palmeri. 



1. Clematis drummondii Torr. and Gray, Fl. North Amer. 1: 9. 



1838. 

 Gila, Maricopa, Pinal, Cochise, and Pima Counties, 4,000 feet or 

 lower, among shrubs usually in comparatively open ground, March to 

 September. Texas to Arizona and northern Mexico. 



2. Clematis ligusticifolia Nutt. ex. Torr. and Gray, Fl. North Amer. 1: 



9. 1838. 



Apache, Navajo, and Coconino Counties, south to Cochise and 

 Pima Counties, 4,000 to 7,000 feet, commonly along streams, May to 

 September. Western Canada and North Dakota to New Mexico, 

 Arizona, and California. 



Apparently intergrades or hybridizes, in Arizona, with C. drum- 

 mondii, and is extremely variable in the shape, size, and dentation of 

 the leaflets. C. neomexicana Woot. and Standi., a form with broad, 

 rounded teeth and lobes, occurs in the Pinal Mountains (Tourney 44) 

 and Chiricahua Mountains (Blumer 1510). An extremely small- 

 leaved variant of this form, with leaflets not more than 2.5 cm. long 

 and equally wide, was collected in the White Mountains (Zuck in 1896). 

 An extraordinary form, collected at Rock Point, Apache County 

 (Peebles 13518), has elongate, nearly entire leaflets 5 to 10 mm. wide. 



Occasionally grown as an ornamental, this plant was formerly used 

 by the Indians as a remedy for sore throat and colds, and it is stated 

 that the crushed roots were placed in the nostrils of tired horses to 

 revive them. 



3. Clematis pseudoalpina (Kuntze) A. Nels. in Coult., New Man. 



Rocky Mount. 198. 1909. 



Clematis pseudoatragene var. pseudoalpina Kuntze, Verhandl. 



Bot. Ver. Brandenb. 26: 160. 1884. 

 Atragene pseudoalpina Rydb., Torrey Bot. Club Bui. 29: 157. 



1902. 



Apache, Coconino, and northern Greenlee Counties, 7,000 to 8,000 

 feet, rich soil of forests, apparently rare in Arizona. South Dakota 

 and Montana to New Mexico and Arizona. 



