104 MISC. PUBLICATION 303, U. S. DEPT. OF AGRICULTURE 



Clematis palmeri Rose. Palmer clematis. 



Viorna palmeri (Rose) Woot. and Standl. 

 Range : 14. 



Site: Dry, well-drained, sun. 

 Fruit : Achene. 

 A vine. 



Clematis pauciflora Nutt. Rope-vine. 



Range : 5. 



Site : Dry, well-drained, sun. 

 Fruit : Achene. 

 A trailing, clambering, or climbing vine ; flowers March-April. 



Clematis pitcheri Torr. and Gray. Red-flowered clematis. 



C. filifera Benth., C. simsii of auth., not Sweet, Viorna pitcheri (Torr. and 

 Gray) Britt, V. filifera (Benth.) Woot. and Standl. 

 Range : 11, 16, 17, 20, 25, 30. 

 Site : Dry, well-drained, sun. 

 Fruit: Achene. 

 A high-climbing vine; flowers June-September. 



Clematis pseudoalpina (Kuntze) Nels. 



C. pseudoatragene pseudoalpina Kuntze, C. alpina occidentalis (Hornem.) 

 Gray, Atragene occidentalis Hornem., A. pseudoalpina (Kuntze.) Rydb. 

 Range: 9, 12, 13, 14. 

 Site: Well-drained, sun. 

 Fruit : Achene. 

 A vine ; flowers April- June ; commonly occurs at high elevations. 



Clematis reticulata Walt. 



Viorna reticulata (Walt.) Small. 

 Range: 11, 20, 29, 30. 

 Site : Dry, well-drained, sun. 

 Fruit : Achene. 

 A branching vine ; flowers in July ; occurs on sandy and other soils. 



Clematis simsii, see Clematis pitcheri. 



Clematis subreticulata Harb. 

 Viorna subreticulata Harb. 

 Range: 29, 30. 

 Site : Dry, well-drained, sun. 

 Fruit: Achene. 

 A vine ; occurs on sandy and other soils. 



Clematis texensis Buckl. 



C. coccinea Engelm., Viorna coccinea (Engelm.) Small. 

 Range: 17, 20. 

 Site: Well-drained, sun. 

 Fruit : Achene. 

 A branching vine; flowers July-September. 



Clematis versicolor Small. 

 Viorna versicolor Small. 

 Range: 25. 



Site : Dry, well-drained, sun. 

 Fruit : Achene. 

 A vine. 



Clematis verticillaris DC. Mountain clematis. 



Atragene americana Sims. 

 Range : 23, 24, 26, 27, 28. 

 Site : Well-drained, moist, shade. 

 Fruit : Achene, available July-August. 



A trailing or climbing vine ; flowers May-June ; often occurs on calcareous soil ; 

 a comparatively weak climber without great luxuriance. 



Clematis viorna L. leather-flower. 



C. glaucophylla Small, C. flaccida Small, Viorna viorna (L.) Small. 

 Range: 25, 27, 28, 29, 30. 

 Site : Dry, well-drained, sun. 

 Fruit: Achene. 

 A vine ; flowers May-August ; usually occurs in rich soil. 



