508 



INDEX. 



Platanus 367 



occidentalis 193, 402 

 Plectronia 276 

 Pleurococcus 101, 345, 364 

 Pluchea 196, 232 



camphorata 282 



sericea 229, 231, 232, 233 

 Poa 207, 208, 241, 252, 254, 364, 365 



annua 273 



bulbosa 273 



compressa 205, 211, 218 



nemoralis 163 



pratensis 212, 262 

 Podooarpus 361, 363 

 Podozamites 406, 413 

 Pohlia 245 



Polanisia trachysperma 214 

 Poliomintha nioana 230 

 Polygonum 188, 193, 196, 199, 213, 225, 

 267, 355 



amphibium 265, 269, 273 



aviculare 224, 247 



densiflorum 193 



hydropiper 191, 274 



incarnatum 188 



lapathifoUum 222, 274 



mite 274 



muhlenbergii 202 



persicaria 274 



viviparum 21 

 Polypodium 405, 413 



alpestre 242 



vulgafle 273 

 Polytriehum 10, 180, 185, 207, 215, 240, 244, 

 245, 252, 259, 275 



juniperinum 248, 382 

 Pontederia 190, 196, 203 



Populus 15, 65, 108, 113, 195, 196, 197, 198, 

 199, 203, 205, 207, 208, 215, 218, 

 221, 225, 352, 353, 354, 356, 363, 

 388, 405 



alba 17 



angustifolia 226 



baJsamifera 189, 402 



candicans 218 



deltoides 193, 222 



grandidentata 212, 402 



heterophylla 213 



mericana 229 



monilifera 203, 204 



tremula 13, 15, 22, 241, 264, 379, 381, 

 382, 383, 384, 386, 388 



tremuloides 93, 187, 189, 193, 209, 212, 

 213, 225, 226 

 Potamogeton 15, 23, 24, 188, 189, 193, 194, 

 195, 196, 197, 198, 199, 203, 221, 

 226, 245, 246, 247, 249, 250, 252, 

 262, 266, 267, 269, 270, 354, 361, 

 363, 383, 386 



confervoides 190 



crispus 380 



filifonnis 386 



lucens 189, 191, 265, 269, 402 



natans 191, 265 



obtusifolius 14 



pectinatus 402 



Potamogeton — Continued. 



perfoliatus 265, 270, 402 



pusillus 238, 402 



rutilans 402 



zosteraefolius 189 

 Potentilla 19, 187, 193, 206, 252 



anaerina 218, 221, 238, 396, 402 



arguta 205 



fruticosa 199, 207, 218, 221 



palustris 187, 189 



tridentata 207, 209 

 Poterium officinale 380 

 Prepinus 405 

 Primula elatior 258 

 Prosopia 180, 222, 223, 230 



glandulosa 232 



pubeacens 229, 232 



velutina 229 

 Proteaephyllum 415 

 Protococcus 83 

 Protorhipis 413 



Prunus 195, 196, 197, 199, 203, 206, 208, 

 211, 226, 254, 263, 267, 366, 362, 

 363, 378, 402 



maritima 202 



padua 383, 384 



pennsilvanica 212 



pumila 203, 208, 218 



serotina 193, 208, 212 



virginiana 204 

 Psamma 23, 240, 245, 250 



arenaria 23, 239, 240, 245, 262 

 Paaroniua 418, 419 

 Paeudobomia 418, 419 

 Pseudocyperus 269, 385 

 Pseudotsuga 64, 70, 225, 226, 228, 363, 365 



douglasii 344 



mucronata 93, 226 

 Pailurua nardoides 273 

 Paoralea 113, 131, 355 



lanceolata 214, 219 



tenuiflora 132 

 Ptelea 205, 206, 212 

 Pteria 252, 259, 260, 361, 366, 383 



aquilina 213, 253, 258, 259 

 PterophyUum 405, 406, 413, 415 

 Ptilozamites 413 

 Pyrethrum 163 

 Fyronema confiuena 260 

 Pyrus 191, 205 

 Pythium 70 



Queroophyllum 415 



Querous 13, 17, 22, 108, 114, 115, 180, 181, 

 187, 189, 192, 197, 202, 205, 206, 

 208, 211, 212, 218, 221, 223, 225, 

 252, 255, 267, 269, 274, 351, 352, 

 353, 354, 355, 356, 362, 363, 365, 

 368, 378, 383 



acuminata 402 



alba 189, 207, 211, 216, 402 



bicolor 187 



coccinea 187, 207, 211 



digitata 207 



macrocarpa 113, 187, 216, 402 



marylandica 216 



nigra 207 



