104 MISC. PUBLICATION 303, U. 8S. 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 paucifiora 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-fiowered clematis. 
C. filifera Benth., C. simsti of auth., not Sweet, Viorna pitcheri (Torr. and 
Gray) Britt., V. filifera (Benth.) Woot. and Standl. 
Range: 21,°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, 18, 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. glaucophyila 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. 
