284 



[426 



References to the Flora are in brackets [ ] 



Botrychium . . . [8 



Virginianum 39, 43, [8 



Bottle-brush grass [too 



Bouncing Bet [136 



Bouteloua 61, [93 



curtipendula [93 



racemosa 62, 63, [93 



Bowman's-root [150 



Box-elder [172 



Brachy elytrum . 39, [91 



aristatum 43, 46, [91 



erectum [91 



Brachy^yne . . . . [209 



macrophylla [209 



Bramble 33> 53) [i53 



Bramble association [53 



Brassica [143 



arvensis [i44 



campestris [i44 



rapifera ... [144 



Japonica.. [144 



juncea [144 



napus , . [144 



nigra [143 



Sinapistrum [144 



Brassica [ 1 43 



alba [143 



Brauneria [233 



pallida [234 



purpurea [233 



Brier 33, 53, [155 



sensitive [156 



wild [15^ 



Brome grass 47, [98 



barren. . . . [246 



Hungarian [98 



Bromus 39, 47, 69, [98 



ciliatus 26, [98 



purgans [98 



kordeaceus [98 



inermis 67, [98 



Kalmii [246 



mollis 70, [98 



purgans 26, 46, 58, [98 



racemosus 70, [98 



secalinus 65, 69, 70, [98 



sterilis [246 



tectorum 70, [98 



Brooklime.. [208], [209 



Broom grass [85 



Broom-rape [210 



Broom-rape family [210 



Brunella [201 



vulgaris 43, [201 



Buck-bush S3» [215 



Buckthorn [i73 



Buckthorn family [173 



Buckwheat [132] 



climbing false [131] 



wild [131] 



Bugle weed [203] 



Bulbet fern 57, [79] 



Bulbet fern association 57 



Bulrush 19, [102] 



great 19, [103] 



Bulrush association 19 



Bur-cucumber [217] 



Burdock [239] 



common [239] 



Burdock association 71 



Bur grass [90] 



Bur-marigold [236] 



Burning bush [171] 



Bursa [146] 



Bursa-pastoris [146] 



Bush clover 52, 63, [164] 



creeping [164] 



Stuve's [164] 



trailing [164] 



violet [164] 



Butter- and-eggs [236] 



Buttercup [140] 



early [140] 



hairy [140] 



marsh [ 140] 



Butterfly pea [261] 



Butterfly weed [193] 



Butternut. [119J 



Butterweed [239] 



Button-bush [213] 



Button-snakeroot [224] 



large [224] 



Button-weed [213] 



rough [213] 



Buttonwood [148] 



Cacalia [22S] 



atriplicifolia 43, [238] 



reniformis 36, [238] 



tuberosa [238] 



Cactaceae [180] 



Cactus family [180] 



Callirrhoe [176] 



digitata [176] 



Callitrichaceae ]i7o] 



Callitriche [170] 



Austini 22, [170] 



dejlexa Austini [170] 



Calystegia [195] 



Americana [195] 



Camassia [114] 



Fraseri 47, 52, [114] 



Camomile ... [237] 



Campanales 61 



psoraleoides 61 



