106 PI.AXT XAMES AND SYNONYMS 



a. C. liitea (Michx. ) Koch (Virgilia lutea Michx., C. fragrans^ 

 Raf., 1824, C. tinctoria Eaf., 1825). Kentucky, Tennessee and 

 N. Carolina. Kentucky Yellow-wood, American Yellow-wood, 

 Yellow Locust, Gopher- wood. Yellow Ash, American Fustic, 

 Wood yields a yellow dye. 



510. CLAPPIA, Gray. Clappia. Compositae. 



Named for Dr. A. Clapp, American botanical author. Per- 

 ennial herb, with fleshy terete leaves. One species, southwest- 

 ern U. S. 



511. CLARKIA, Pursh (Clarckia). Onagraceae. 



Annual herbs with purple or rose-colored flowers. About 6 

 species; Pacific coast of N. America (U. S. ). 



512. CLAVICEPS, Ergot. Pyienomycetes. 



From Latin, ''club head". Syn. Cordiceps. Parasitic on 

 fruit of various grasses. 



a. C. purpurea (Fries) Tulasne (Cordiceps purpurea Fries). Para- 

 sitic on Rye. Ergot, Spurred Rye, Smut of Rye, Cockspur 

 Eye, Mother of Rye, Hornseed. Sderotium of the fungus; 

 Ergota, U. S. P., Br.; Secale cornutum, Clavus [secalinus, 

 Mater secalis; Ger. Roggenmutter, Mutterkorn, Zapfenkorn, 

 Hungerkorn; Fr. Ergot de Seigle (Codex), Seigle ergote 

 (noir), Ble cornu; Sp. Cuernecillo (Tizon) de Centeno; ecbolic, 

 haemostatic. 



513. CLAYT6NIA, L. Spring-beauty. Portulacaceae. 



Named for John Clayton, American botanist, d. 1773. Syn. 

 Montia, in part. Succulent herbs. About 25 species, mostly 

 of N. America; 20 in U. S. 



a. C. Caroliuiana Michx. and (b) C. YirginicaL., of the eastern 

 U. S. are called Spring-beauty, Good-morning-Spring, Grass- 

 flower, May-flower, Wild Potato. The related (c) C. lanceolata 

 Pursh. of the west is called also Pigeon-root. 



d. C. Cliamissoi Ledeb. Western U. S. Chamisso's Claytonia, 



Toad-lily. 



e. C. perfoliataDonn. (M. perfoliata Greene). British Columbia 



to Mexico. Indian Lettuce, Spanish Lettuce. Plant used as a 

 pot herb. 



514. CLEMATIS, L. Virgin' s-bower. Ranunculaceae. 



The Greek name of some climbing plant. Vines or peren- 

 nial herbs with persistent plumose styles. About 100 species, 

 25 in U. S. The plants are acrid and many have been used as 

 vesicants and counter-irritants. 



a. C. crispa L. (C. cylindrica Sims). Southeastern U. S. 



Marsh Clematis, Curl-flowered Clematis, Bluebell vine. Blue 

 Jessamine (Jasmine). 



b. C. riammula L. Southern Europe and northern Africa. 



Sweet-scented Virgin' s-bower. 



