~l 
erectum ... 
exsertum .. 
Fowleri ... 
ee 
s\ ew) @) eta) we mine ela 
Hartwrightii ..........2 
Hydropiper 
hydropiperoides ......... 
incarnatum 
lapathitolnum’) ese 
littorale .. 
maritimum 
Muhlenbergi 
orientale .. 
reir cc 
pennsylvanicum ......... 
persicaria . 
punctatum 
ramosissimu 
Raye 
sagittatum 
scandens .. 
tenue eee 
virginianum 
Viviparum . 
Polymnia ..... 
canadensis 
uvedalia .. 
POLYPETALAE .. 
Polypremum .. 
procumbens 
POMACEAR =... 
Pontederia .... 
cordata ... 
PONTEDERIACEAE 
Populus: 2 soc. seine): cere «arene 
FMeEy Gh aao 
balsamifera 
“ec 
deltoides .. 
© ele) viejo 6 enn winia ge 
se 0\ (0 \0 eset =) aun 
20 a a eee \e mee aie 
e666» oyels = sel p ae 
©) 8) a0) ee (e/v (ee jure 
aye v wke! el dis speunenee 
is. 8 os). 0 « wo) elm pee: 
\le; (= (o!/6\0; | =e) eiinene 
grandidentata .......... 
heterophylla 
Miorawe eae 
pyramidalis 
tremuloides 
Porteranthus .. 
Portulaca ..... 
grandiflora 
oleracea .. 
PORTULACACEAE 
PORTULACINEAE 
Potamogeton .. 
alpinus ... 
americanus 
amplifolius 
CROMOR CCI Chet 
oe) 6 © wivis\ saw Senne 
oa) coe) a yous are ane 
ANPUSTIONIIG! Hcccietiseeeare 
bupleuroides 
confervoides 
CYISPUSiata.G 
28 INDEX 
CAMpPNoOrauaay wae ese 674 
TOCTIC SH cme oion es, oc e ee 674 
PUUMBAGINAGEAE <5. dea cee se 482 
PNHeUMaATIa: VMS te a eer 511 
DIATE Moyes ee ies 511 
Podophiylhumig ny cs 6 ser 266 
PelbatimM ees ae) ae ae 266 
IF ODOSTEATACHAR) = 2s demic sok 295 
IPodostemon, (2.07 s seo aoe 295 
ceratophy lnm) oa. 295 
POONA No. Mca. eee ee 155 
Weta h soy mene eA Rae 5 Lane 150 
GUVATIC A Le cach, rotleece sore 155 
ophioglossoides ......... 155 
trianthophora -.....:... 155 
VELvlelataa ere eee ior 155 
Polamistalnsnes wia2 see ceo 290 
CRAVEOLCTIS Me. ei ieee 290 
POLEMONTACHARY 2.5 jeer 504 
Polemonin! 225 seen 507 
coenileninw- eto: 507 
TEPUANS) = 15 wack ane pee 507 
Van Briuntide eee cne. 507 
Polyester fae ata 371 
Chilly) | Geaoagece uy en ae 372 
PLEVIROLIA. eee ales 372 
CLUCIAtAT eee are 371 
INGATI Via sia suniowee secs over 372 
LID Pc: Vino et irs ce, ete Un Re re 372 
MATIUATICNe er ee Rector ee 372 
ENTtGail Tig Besa nc tcne a erervers 372 
POlV Sama serene seer 372 
EMIGUOMEH Asbo Sabscdcce 372 
SEQUIN nk ocoagsm acne 372 
SENEGA! | 2. scicucren mane 312 
VELCICUNAUA ee ena 372 
WMTIGESCENS 325s ee eae 372 
IPOLYGALAGEAB <.c scene 371 
IPOUYGONAGEAR .. >< /ceanteeeion 200 
POEXGONALES 20.5% s<15 eieieiele 200 
Polyconatim. 1. scr beeen ete ac 136 
DiforuiM'’s - ~ ee eee 158 
COMMINUbAUUIN Ley. eerie 138 
Poly conella sccm: aeemaite sue 210 
arbicwlaba.t. seas coe. ree 210 
Poly momunay $63 ven nyt ic abe wot aieee 204 
ROVO? rie yShe oe bomiehetees Eke 206 
cheagolintepebenl a Ara csp 205 
APiiGliimM)) oe eee ee 210 
BVICUIATE:. 2c. a eee ee 206 
WATEVL) cievia. cuqeeMepeameteant 206 
CLUNOdE dy eciiec se ee 208 
COnvOlVUlUs! <c.5cseknes 208 
CRISTO © 6s.« uxt seo 208 
Doviglasi :\.:/st. scenes 208 
GUMELOTUM, jhe s eh Cee 208 
CMETEUIN: vv0 ih 650 cee Ra 205 
dimorphus 
OG) f Wives Slee 
6:00 6 9 0 elt 6b Dele 
