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



Correosa (Rhus microphylla, 



Xanfhoxylum fagara). 

 Cotton, Arizona wild (Thurberia 



triloba). 

 Cotton, 



gum (Nyssa aquatica). 



thorn (Tetradymia spinosa). 

 Cottonwood (Populus dcltoides, 



Populus trichocarpa) . 



Arizona (Populus arimonica) . 



Balsam (Populus trichocarpa). 



Black (Populus trichocarpa). 



Eastern (Populus deltoides). 



Fremont (Populus fremontii). 



Lanceleaf (Populus acuminata). 



Narrowleaf (Populus angustifolia). 



Palmer (Populus palmeri). 



River (Populus sargentii). 



Sargent (Populus sargentii). 



Smooth (Populus acuminata). 



Smoothbark (Populus acuminata). 



Swamp (Populus heterophylla) . 



Texas (Populus texana). 



Tweedy's (Populus tweedyi). 



Valley (Populus wislizenii). 



Western (Populus sargentii). 



Willow (Populus angustifolia). 



Wislizenius (Populus wislisenii). 

 Coulter pine (Pinus coulteri). 

 Cow oak (Quercus prinus). 

 Cow-itch (Campsis radicans, 

 Cissus arborea). 



vine (Decumaria Barbara). 

 Cowlicks (Halesia diptera). 

 Coyote, 



brush (Baccharis pilularis). 



willow (Salix exigua). 

 Coyotillo (Karwinskia humboldtiana) . 

 Crab apple (Malus glabrata, 



Malus glaucesccns, 

 Malus platycarpa). 



American (Malus coronaria). 



Iowa (Malus ioensis). 



Lanceleaf (Malus lancifolia). 



Narrowleaf (Malus angustifolia). 



Oregon (Malus fusca). 



Prairie (Malus ioensis). 



Soulard (Malus soulardii). 



Sweet (Malus coronaria). 



Western (Malus fusca, 



Malus ioensis). 

 Crab cherry (Prunus avium). 

 Crack willow (Sail fragilis). 

 Cranberry (Vaccinium macrocarpon) . 



Highbush (Viburnum trilobum). 



Mountain (Hugeria erythrocarpa, 

 Vaccinium vitis-idaea) . 



Small (Vaccinium oxycoccus). 

 Cranberrybush 



American (Viburnum trilobum). 

 Cream bush (Holodisous discolor). 

 Creosote bush (Covillva tridentata). 

 Creek, 



dogwood (Cornus calif ornlca) . 



plum (Prunus rivularis). 



Creeping, 



barberry (Berberis repens). 



blueberry (Vaccinium crassifolium) . 



hollygrape (Berberis repens). 



shadbush (Amelanchier stolonifcra) . 



snowberry (Chiogenes hispidula). 



witch alder (Fothergilla parvifolia). 

 Crimson monkeyflower (Mimulus pu- 



niceus). 



Crooked bush (Forestiera acuminata). 

 Crossvine (Bignonia capreolata). 

 Croton, 



Alabama (Croton alabamensis) . 



Shrubby (Croton fruticulosus) . 

 Crowberry, (Empetrum nigrum). 



Broom (Corcma conradii). 



Brown (Corema conradii). 



Plymouth (Corema conradii). 

 Crown-of -thorns (Koeberlinia spinosa). 

 Crucifixion thorn (Canotia holacantha, 

 Holacantha emoryi). 

 Cucumber magnolia (Magnolia acumi- 

 nata). 

 Cucumbertree (Magnolia acuminata). 



Large-leaved (Magnolia macrophyl- 

 la). 



Long-leaved (Magnolia fraseri). 



Yellow (Magnolia cordata). 

 Cupseed (Calycocarpum lyonii). 

 Curly clematis (Clematis crispa). 

 Curl-flower (Clematis crispa). 

 Curlleaf mountain-mahogany ( Cerco- 



carpus ledifolius). 

 Currant, 



American red (Ribes triste). 



Black (Ribes americanum). 



Blood (Ribes sanguineum). 



Buffalo (Ribes odoratum). 



California black (Ribes malvaceum). 



Colorado (Ribes coloradense) . 



Fetid (Ribes glandulosum) . 



Golden (Ribes aureum, 



Ribes odoratum). 



Gooseberry (Ribes montigenum). 



Hudson Bay (Ribes hudsonianum) . 



Missouri (Ribes odoratum). 



Mountain (Ribes viscosissimum) . 



Nevada (Ribes nevadense). 



Red-flowered (Ribes sanguineum). 



Rothrock (Ribes wolfii). 



Sheep (Ribes cereum). 



Sierra (Ribes nevadense). 



Skunk (Ribes bracteosum, 

 Ribes glandulosum, 

 Ribes prostratum). 



Squaw (Ribes cereum). 



Sticky (Ribes viscosissimum) . 



Stink (Ribes bracteosum). 



Swamp (Ribes lacustre). 



Viscid (Ribes viscosissimum). 



Wax (Ribes cereum). 



Western black (Ribes laxiflorum). 



Winter (Ribes sanguineum). 



Wolf (Ribes wolfii). 

 Currant grape (Vitis simpsonii). 

 Curtiss grape (Vitis sola). 



