Potamogeton hybridus 
PENTAGN (oj. ssisisierg to eee 
Potamogeton illinoensis MORONG 
Potamogeton interruptus Krr. 
Potamogeton lanceolatus SM..... 
Potamogeton loeselii R. and S. 
—-lonchites TUCKM....... 
Potamogeton lucens LINN....... 
Potamogeton lucens var. minor 
UW PEs aseais yalig aes aapdancts 
—major MORONG......... 
—mucrohatus Nym 
Potamogeton natans LINN...... 
Potamogeton natans 
angustatus MK....... 
—natans var. fluitans 
CHAM is eagle dawataee : 
=—oederl MEY ace iccs vanes 
—oblongus MBy.......... 
— palustris TEESD......... 
——pauciflorus PursH...... 
——paucifolius OP.......... 
Potamogeton pectinatus LINN... 
—perfoliatus LINN......... 
—-perfoliatus var. lanceo- 
latus RoBBINS............ 
— perfoliatus var. richard- 
sonl BENNETT......... 
—petiolaris PR............ 
Potamogeton praelongus WULF. 
Potamogeton proteus var. het- 
erophyllos CHAM. and 
SCHLECHT occu: gucess 
——proteus f. lucens CHAM. 
and SCHLECHT........ 
— proteus f. zizii CHAM. and 
SCHLECHT, 2045 Kanes 
—purshianusMORONG..... 
Potamogeton pusillus LINN..... 
Potamogeton  pusillus” var. 
major FRIES.......... 
Potamogeton rutilus WOLFG.... 
Potamogeton serratus WEBB. . 
—-vaillantii R.andS...... 
——verticillatum WALT..... 
—volhynicus BESS........ 
—zizii ROTH.............. 
Potamogeton zosteraefolius 
SCHUM ...ccesarre ccacons 
Potamogetonaceae......... 
Potaninia, MAS exces vere esas 
Potentilla LINN........-.-.0065 
—anserina LINN..........- 
—argentea LINN..........- 
—arguta PURSH........... 
Potentilla bipinnatifida 
simplex 
—canadensis var. 
(MICHX.).. 
INDEX. 
809 
Potentillacaroliniana Poir... 294 
—confertiflora TorR...... 298 
—-floribunda Pursa....... 295 
Potentilla fruticosa LINN....... 295 
Potentilla fruticosa var. ameri- 
cana MARSH.......... 295 
Potentilla hippiana LEHM.... 297 
Potentilla lacradorica LEHM.. 298 
—leucophylla Torr....... 297 
Potentilla millegrana ENGELM.. 298 
—norvegica LINN.......... 289 
—pclustris (LINN.)......... 296 
Potentilla paradoxa NuTT.... 297 
Potentilla pensylvanica LINN.. 297 
Potentilla pensylvanica var. 
arvuta "PORK sexes es 299 
—pensylvanica var. bipin- 
natifida T. and G..... 297 
—pensylvanica var. hip- 
piana T. and G........ 297 
Potentilla pensylvanica var. 
strigosa PURSH........ 201 
Potentilla pumila Porr....... 294 
—tretusa MULL............ 295 
—ivalis var. millegrana 
WATS paiva sais eile td 298 
—sarmentosa WILLD...... 294 
—— simplex MICHX.......... 294 
Potentilla supina LINN.... .... 297 
—tridentata SOL........... 295 
Pothos foetidus MICHX....... 131 
Prasium concinneum WALT.. 446 
—purpureum WALLT....... 446 
Praxelis CASS..............25. 501 
Prenanthes LINN..........024. 565 
-—alba LINN. .............. 566 
—aspera MICHX.......... 566 
—crepidinea MICHX........ 567 
Prenanthes illinoensis Pers... 566 
—juncea PURSH.......... 565 
——miamensis RIDD........ 566 
— ovata RIDD............. 566 
—proteophylla Ripp...... 566 
Prenanthes racemosa MICHX... 566 
Prenanthes rubricunda WILLD 566 
Prenanthes serpentaria PuRsH. 566 
Prenantbes suavis SALISB....- 566 
Prestinaria SCH.-BIP.......... 543 
Prieuria DO. os «os aisiieeceoacsa 375 
Primula O. KUNTZE.......... 411 
— occidentalis OK......... 411 
Primulaceae................ 411 
Primulopsis T. and G......... 381 
PrinOSiTuINN <4 sees wines ccadwaee 349 
—-gronovii MIcHx......... 350 
—confertus MOENCH...... 350 
—verticillatus LINN...... 350 
Prionopsis NUTT.............. 514 
Prismatocarpus L’HER........ 496° 
Proteopsis SCH.-BIP........... 499 
Provenzalia ADANS. ......... 131 
Prunella LINN «03. sccius sac 446 
Prunophora NECK............ 305 
Prunopsis ANDR.............. 305 
