INDEX. 



623 



PAGE. 



Waldsteinia, Willd 134 



fragarioides, Tratt 134, 515 



Wyethia, Nutt 550 



amplexicaulis, Nutt 550 



Xanthium, Tourn 241 



Canadense, Mill 241 



var. echinatum, Gr 241 



echinatum, Murray 241 



spinosum, L 242 



strumarium, L., var. Canadense, 



T.&G 241 



Xanthoxylum, Golden 93 



PAGE. 



Americanum, Mill 93 



Jraxineum, Willd 93 



ramiflorum, MX 93 



tricarpum, Hook 93 



Xylosteum ciliatum, Pursh 197 



var. /3, album, Pursh 196 



Tartaricum, MX 197 



villosum, MX 198 



villosum, Richards 198 



Zizia aurea, Koch 181 



cordata, Koch 181 



integerrima, DC 180 



