312 



[454 



References to the Flora are in brackets [ ] 



Maryland [iS7] 



Sensitive brier 6i, 62, [156] 



Sensitive brier association. 62 



Sensitive fern [79] 



Sentae 53 



ruboides 53 



Serratula Caroliniensis [261] 



Service berry [151] 



Setaria 68, 70, 71, [89] 



glauca [89] 



Italica [89] 



verticillata [90] 



viridis [89] 



Seymeria 39, [2C59] 



macrophylla [209] 



Shad-bush [151] 



Sheepberry [215] 



Shepherd's purse 69, [146] 



Shield fern [79] 



Shin- LEAF family [189] 



Shooting star [190] 



Shov^y primrose [183] 



Sickle-pod [i47] 



Sicyos [217] 



angulatus 70, [217] 



Sida [176] 



spinosa 721 [176] 



Sida, prickly [ 176] 



Sieglingia [94] 



seslerioides [94] 



Silene [135] 



alba [135] 



antirrhina [135] 



nivea [135] 



stellata [136] 



Silkweed [194] 



Silphium 32, [231] 



integrifolium 62, [231] 



laciniatum [231] 



perfoliatum 26, 29, [231] 



terebinthinaceum 62, [231] 



SiMARUBACEAE [167] 



Sinapis [143] 



alba [143] 



Sisymbrium [143] 



oflBcinale [143] 



Sisymbrium [i47] 



canescens ['47] 



inasum ['47] 



Thalianum [249] 



Sisyrinchium [118] 



anceps [118] 



campestre [118] 



graminoides 43, [118] 



Sium [187] 



cicutaefolium 20, [187] 



Skullcap [199] 



mad-dog [200] 



prairie [200] 



small [200] 



veined [200] 



Skunk grass [94] 



Smartweed.13, 30. 31, 32, 72, [129] 



common [130] 



water [130] 



Smartweed association.... 31 



Smilacina 46, [115] 



racemosa 46, [115] 



stellata 4^, [115] 



Smilax 39, [116] 



ecirrhata [116] 



herbacea [116] 



pulverulenta [li6] 



hispida 34, 42, 53, [116] 



Pseudo-China [247] 



pulverulenta [116] 



rotundifolia . . . .34, 42, 53, [116] 



Smilax, false Chinese [247] 



upright [116] 



Snake-head [207] 



Snakeroot, black [184] 



Seneca [251] 



Virginia [128] 



white [224] 



Sneezeweed [236] 



fine-leaved [236] 



purple [237] 



swamp [237] 



Snowberry [215] 



Soapberry [136] 



Soil 7 



SOLANAOEAE : [204] 



Solanum [205] 



Carolinense 71, [205] 



Dulcamara [205] 



Lycopersicum [205] 



nigrum 71, [205] 



rostratum [205] 



tuberosum [205] 



Solea [178] 



concolor [ 1 78] 



Solidago 27, 39, 47, [225] 



bicolor [254] 



Canadensis 44, [226] 



procera [226] 



scabra [226] 



scabriuscula [226] 



Drummondii 59, 60, [226] 



flexicaulis 36, 47, 57, [225] 



juncea [225] 



latifolia [225] 



longipetiolata 63, 64, [226] 



Missouriensis [225] 



mollis • • [226] 



