Polygonum aviculare 
RUA CMI OU QOL acs ass St Net SE AARNE ISG OEE, oe Se ete 37 
2 LER ROTTER RSG ARR AAA aS eR AS Ag A na Re ee 345 
WARD TIL CESRIZOULY GOULET Aa ters th oes ee a PE Ce Coe te eT cries tia 174 
Polygonum Convolvulus 
AR CRIP OL DOI prec sha easy Micky ah ER neta eth Cot ene oe Seer oO” 
WamIOR MOLINE OLY TON Le is oct ts 0s tie tah re i he nk oe. 14 
PP CCURIOLE OLY OONI-ANUPNLOU.-.° sei Gsuaye Raa el Lee. ee Roe tes 149 
Polygonum erectum 
Prysiphe Polygom. ... 2.2. .5.. Sr Paste aCe Ta Ue RE et 37 
Polygonum hydropiper 
EEA SUR UMUUOTONUDCUIS: 5 s00ke Silos Gui eeR SOE A ee oe tien 314 
Polygonum hydropiperoides 
EEE EOL NOMOT UT Uc.s wtoies ics Suave, a As clas en eee a ee ae ae 245 
Polygonum Muhlenbergii 
CTCOSMONCRNY ARO DUDEIUS Ataris, cc toettie ccs ote ORs ita iacia Roe ee ee 314 
DHCCULIOMI AOL GONG CNUD LULL an Maen eee eee ee ee ae 149 
PPG GT ZO! ) JO RONU MER ae st cs) 2s aaa modes) uae B ckiry he Se es 245 
Polygonum pennsylvanicum 
PEE LIEBE GOL JOTUOMENIO «LPacare ote (8 Clue ake. «SUR Ae NO ete me onstrates, © a iete 245 
Polygonum scandens 
USEC COROTLO INL CC Ne tine Reker re eee AS ea Re IRE an ene has Nes 87 
Populus balsamifera 
HEHE SONG MUNCUUSUG chao -9 a ciate tame os.) Sictoeadewentyay a oe oh Cle ieee 108 
Populus deltoides 
PE EBL TSUNEO WCU USULE Meyro aiacBicscg ici eder sisal actek Aare sae OS 108 
Populus grandidentata 
REV ATE SOTO CACHE AC 2 fepsce tcl “Fel rea Ona Me tins Ce cheat tea heats PR ee 108 
Populus tremuloides 
Melampsora Medusae.... . Parks ae ST Ne ee ae eee are ert 108 
Populus sp. 
DICT GIT DAOTIERVUCH ISIE. ein tec wy oe ace suseer a pettokal csr eve el SE bua oe tiene Bs 108 
Portulaca oleracea 
Ad ietipay TEV giNGKGI LOS CO AN att BCPC PS Tira Ohne tigre el eal a ne 52 
Potentilla canadensis 
PAR AULLAC IMM INUATUUGULALILIN «Gea etsic cathe. soe as hud wee aes were ne aieoee 110 
Potentilla monspeliensis 
LULONGSG: SOT ORES < cloieecs ORI 0.6 MORE Se ORO AOC Lee OD eee 23 
ZCF ONO SO) Ce OUCH LULL LE env We PH EL ST Me US, LS os ecsis Peete elise on = eens 15 
ATED EPR OROGI ISLS tN er Fea eee Re ae eo ae NTA eee ee oe 350 
Prenanthes alba 
(CErCOSPONCMIATETUCMULUS Pum Miami ita eye sen aes eae OPS ene es 320 
Prunella vulgaris 
ROEM OAOD, JEPUTIALICT Os, or0 ob ONeW, 10 6 CROSS Old oro Beers 0-6: 0ie a ibmucrontiD Ee 351 
IS PUACTOURCE MUTRULE VOT JULIGTIUCO an 6 ia s sc clays aati agiess yee me 47 
Prunus americana 
OCCA CER RIN OTIMON LCs. tyne ae << aj. «Pada ayers, njei sie eye) oe aiein tes! Sitio ane eae 
