808 



METASPEKMAE OF THE MINNESOTA VALLEY. 



Polygonum erectum LINN 208 



Polygonum flliforme BART 208 



geniculatum POIB 209 



glandulosum POIR 205 



Polygonum hartwrightii GRAY. . 206 



hydropiper LINN 205 



Polygonum hydropiper MICHX. 205 

 Polygonum hydropiperoides 



MICHX 205 



Polygonum hydropiperoides 



PURSH , 205 



Polygonum incarnatum ELL 207 



Polygonum lapathifolium var. 

 incarnatum WATS, and 



COULT 207 



linifolium MUHL 208 



mite ELL 205 



mite PURSH 205 



muhlenbergii S. WATS. . 206 



muticum MOENCH 209 



nodosum var. incarna- 

 tum GRAY 207 



Polygonum pensylvanicum LINN. 207 



Polygonum persoonii ENGELM. 205 



provinciale KOCH 209 



punctatum ELL 205 



purpureum GILIB. 206 



Polygonum ramosissimum 



MICHX 208 



sagittatum LINN 210 



Polygonum sagittatum var. 



boreale MEISN 210 



scabrum MOENCH 207 



Polygonum scandens LINN 210 



tenue MICHX 208 



Polygonum terrestre BSP 206 



Polygonum virginianum LINN . . 209 



POLYNOME SALISB 160 



Polypogon setosus SPRENG 60 



Polymnia BAILL 531 



Polymnia LINN 531 



canadensis LINN 531 



Polymnia canadensis var. dis- 



coidea GRAY 531 



Polymniastrum LAM 531 



Polydon HBK 70 



Polyotus NUTT 423 



heterophyllus NUTT 423 



Polypogon glomeratus WILLD 60 



racemosus NUTT 60 



Polypremum A DANS 492 



Polyperis LESS 548 



Polystigma MEISSN 350 



Polytaenia DC 389 



nuttaUii DC 389 



Pomaceae KNDL 281 



Ponceletia THOU 69 



Ponerorchis REICH, f 165 



Pontederia LINN 137 



Pontederia angusti foliaPuRSii 1 37 



Pontederia cordata LINN 137 



Pontederia mucronata RAF. . . 137 



Pontecleriaceae 137 



Populago TOURN 230 



Populopfiyllum 179 



Populus LINN 179 



Populus atheniensis HORT 181 



angulata AIT 179 



angulosa MICHX 180 



Populus balsamifera LINN 180 



Populus talsamifera var. gen- 



uina WESM 180 



balsamifera lanceolata 



MARSH 180 



canadensis MICHX. f... 180 



candicans AIT 180 



Populus grandidentata MICHX . . 180 

 Populus grandidentata var. 



pendula TORR 180 



laevigata AIT 179 



macrophylla LODD 180 



Populus monilifera AIT 179 



Populus tacamahaca MILL 180 



tremuliformis EM 181 



Populus tremuloides MICHX... 181 



Populus trepida WILLD 181 



viminea BON 180 



Porphyroscias MIQ 391 



Porroteranthe STEUD 80 



Porrum SALISB 147 



Portulaca LINN 219 



retusa ENGELM. and 



GRAY 219 



Portulacaceae 217 



PortunaNuTT 406 



Potamogeton LINN 33 



Potamogeton acuminatus 



SCHUM 38 



acuminatus WAHL 38 



acutifolius PR 36 



Potamogeton amplifolius 



TUCKM. 35 



Potamogeton angusti foli u s 



OP 36 



berchthold ii FIEB 36 



caudatus SEID 38 



complanatus WILLD... 



compressus AUCT 



compressus SM 



cornutus PR 



39 

 39 

 37 

 38 



crispus DARL 35 



cuspidatus SCHRAD 39 



fasciculatus WOLFG 37 



fllicaulis SCHUR 



flexicaule DETH 38 



flexuosus SCHL. and 



WRED . . 38 



Potamogeton fluitans ROTH 34 



foliosus RAF 39 



Potamogeton f riesi i Rupii 37 



gramineus MER 36 



gramineus ROTH 35 



gramineus var. hetere- 



phyllos FRIES 35 



Potamogeton gramineus var. zizii 



(ROTH) 36 



lieterophyllos SCHREIJ 35 



