INDEX 



381 



Spirillus perfoliatus 



var. Richardsonii .. . . 17 



praelongus 17 



pulcher i6 



pusillus 18 



Robinsii 29 



Zizii 17 



zosteraefolius 17 



Spirodela 44 



polyrhiza 44 



Staurogeton 42 



trisulcus 43 



Stellaris '. 282 



graminea 284 



longifolia 282 



longipes 282 



Stellaric 107 



Strithiop)teris 197 



Struthion 292 



Struthiopteris . . .194, 195, 196, 197 



Cordi 196, 197 



Sturmia 123 



Stylophorum 344 



disphyllum 341 



Styrandra no 



Suber 229 



Sumnera 254 



clavata 254 



Superba 293 



recentiorum. 293 



Sykaminea 232 



Symplocarpus. . 46 



foetidus 46 



Synandrae 117 



Syndesmon 253, 254, 288, 323 



thalictroides 288, 323 



Syntheris. . . 188 



alpina i88 



gymnocarpa 189 



rubra 188, 189 



wyomingensis ! . 189 



Talauma 297 



Talinum 281 



teretifolium 281 



Telmatophace 44 



Thalesia 190, 191 



Thesium umbellatum 235 



Thalictrum 253, 323 



alpinum 254 



anemonoides. . . .253, 



288. 323 



canadense 254, 323 



caule unifloro 288 



clavatum 254 



cornuti 254, 323 



corynellum 323 



dasycarpum j . . . . 324 



dioicum 324 



foetidum 254 



polyamum 254, 323 



Thamecnemum 293 



Thuja occidentalis 166 



Thuniinae 124 



Thyris 293 



Tiniaria 242 



cilinodis 242 



convolvulus 242 



dumetorum 242 



Tissa 296 



Tofieldia 104 



glutinosa 104 



Tovara 241 



virginiana 241 



Adams 109 



Toxylon. . . . : 232 



pomiferum 232 



Tracaulon 242 



arifolium 242 



sagittatum 242 



Tradescantia 100 



reflexa 100 



virginica 100 



Tragopyrum 237 



Tremula 281 



Trichoon 332 



Phragmites 332 



Trichlisperma 180, 181 



grandiflora 181 



paucifolia 181 



Trichophyllos 320 



Trichophyllon 320 



Triglochin 19, 20 



data 20 



maritima 20 



var. elata 20 



