41& 



Scirpus equisetoide^ Elliott. 



lacustris, Linn. 



lineatus, Mx. 



macrostacbyos, Muhl. 



palustris, Linn. Marsh club rush, 



spadiceus, Linn. 



sub-squarrosus, Muhl. 



sub-terminalis, Torrey. 



tenuis, Ww. Club rush. 

 Scleria triglomerata, Mx, Whip-grass. 

 Scrophularia lanceolata, Pursh. 



marylandica, Linn. Fig-wort. 

 Scutellaria ambigua, Nutt. 



cordifolia, Muhl. 



galericulata, Linn. Scull-cap. 



lateriflora, Linn. Mad-dog scull-cap. 

 Senecio Balsamitae, Mohl. Balsam groundsel. 



hieracifolius, Linn. Fire-weed. 



vulgaris, Linn. Groundsel. 

 Setaria glauca, P. de B. Fox-tail. Panic grass. 

 Sida Abutilon, Linn. Indian mallows. 

 Silene antirrhina, Linn. Sleepy catch-fly. 



stellata, Aiton. 

 Silphium gummiferum, Elliott. Eosin-plant. 



perfoliatum, Linn. Ragged-cup. 



terebinthinaceum, Linn.. Prairie dock. 

 Sinapis nigra, Linn. Black mustard. 

 Sisymbrium ofiicinale, Scopoli. Hedge mustard. 

 Sisyrinchium anceps, Cavanilles. Blue-eyed-grass. 

 Slum latifolium, Linn. "Water parsnep. 

 Smilacina bifolia, Des Fontaines. Dwarf Solomon's seal. 



racemosa, Des Fontaines. Spiked Solomon's seal, 

 stellata, Des Fontaines. 

 Smilax herbacea, Lmn. Bohea tea. 



peduncularis, Mubl. Jacob's ladder. 



rotundifolia, Linn. Horse brier. Green brier. 



