560 



INDEX. 



Page. 



Polygonum iricanum . ii. 149 

 lapalhifolium . 149 



linifolium 153 



marinum 152 



maritimum 152 



mite 150 



orientale 146 



Pennsylvanicum, 150 



Persicaria 149 



punctatum 151 



sagittatum 148 



scandens 147 



tenue 153 



Virginianum . . 151 



POLYMNIA i. 371 



Canadensis 371 



Uvedalia 372 



Polyotus helerojphyllus, ii. 124 



PoLYPODiuM ii. 484 



hulbiferum 501 



calcareum 485 



conneclile . 484 



Dryopteris 485 



fragile 501 



hexagonopterum. 485 



Ilvense 500 



marginale 495 



Pliegopteris . . 484 

 Thelypleris... 497 

 Virginianum . 484 



vulgare 484 



Polypody ii. 484 



Polypogon glomeratus, ii. 537 



racemosus 437 



setosus -. 437 



Polystichum acrosiichoides, 



ii. 497 



POME^ i. 220 



Pond Dogwood i 313 



Pondweed i. 253 



Pond weed Tribe i. 249 



PONTEDERIA ii. 312 



anguslifolia . . 312 



cordata 312 



mucronata 312 



