288 



[43° 



References to the Flora are in brackets [ ] 



antennarioides 65 



opuntioides 65 



CoDinsia [206] 



verna 34, 45. 46, [206] 



Columbine [13S] 



wild [13S] 



Comandra [ 1 28] 



umbellata. . .48, 52, 65, 66, [128] 

 Comfrey [l97]. [253] 



wild [197] 



Commelina 35, [no] 



nudiflora .35, [no] 



Virginica [m] 



COMMELINACEAE [lio] 



Compass plant [231] 



COMPOSITAE 



• ■ • 27. 32, 38, 47, 61, 68, [21S] 



Composites 8, 50, 70 77, 78 



Cone-flower . . [233] 



gray-headed [234] 



purple [233] 



pale [234] 



short-rayed [234] 



small-flowered ... [234] 



sweet [233] 



tall [233] 



CONIFERAE 78 



CONIFERALES [82] 



Conifers [82] 



Conioselinum [252] 



Canadense [252] 



Chinense [252] 



Conobea [208] 



multifida 23, [208] 



Conocephalus conicus 57 



Conoclinum [223] 



coelesiiuutn [224] 



CONTORTALES [191] 



Controlling factors of plant- 

 association.. 12 



CONVOLVULACEAE [l94] 



Convoh'ulus [195] 



Americanus [ 195] 



septum Americanum [195] 



Cord grass, freshwater [93] 



Coreopsis 21, 27, 30, 70, [235] 



discoidea .... 32, [236] 



involucrata 32, 68, [235] 



X Bidens comosa [236] 



palmata 62, [235] 



tinctoria [235] 



trichosperma [254] 



tripteris 43, [235] 



Coriander [185] 



Coriandrum [185] 



sativum... . ... [185] 



Corn 70 



Indian [85] 



CORNACEAE [188] 



Cornel [188] 



panicled [188] 



Cornflower [240] 



Corn salad [215] 



goosefoot . [253] 



Cornus 38, [188] 



Amomum [188] 



asperifolia 41, 51, 60, [188] 



Drummofidii .... [188] 



Baileyi .. [188] 



candidissima 41, 51, [188] 



Drummondii. . .41, 51, 60, [188] 



florida 41, [189] 



paniculata 188 



sericea 28, [188] 



Corpse-plant [ 189] 



Corydalis [142] 



aurea [249] 



occidentalis [l43] 



crystallina [143] 



flavula 52, [142] 



montana 35, 47. [i43] 



Corydalis, golden. [249] 



Corylus 39, [123] 



Americana 44, 47, 52, [123] 



Cotton grass [102] 



Cottonwood I, 25, 48, [121] 



Couch grass [99] 



Cowbane [1S6] 



spotted [186] 



Cowbane association 20 



Cowslip, American .... [190] 



Crab-apple [150] 



western [151] 



wild 52, [150] 



Crab-grass ... .86, [94] 



small [255] 



Cracca [161] 



Virginiana [161] 



Cranesbill [166] 



small [166] 



spotted [166] 



Crassulaceae [147] 



Crataegus 77, [151] 



Biltmoreana [152] 



campestrzs [152] 



Chapmani [i 53] 



coccinea. [l.?2] 



macracattiha ['52] 



jnollis [ 152] 



cordata [151] 



Crus-gallt . . [151] 



Eggerti [151] 



flava . . [250] 



macracaiitha ... [152] 



