176 INDEX. , 
Page. Page 
Placodium—Continued. Potamogeton 
coralloides, Tuckerm 162 PRUNE, ARSE e eae een le nee oe cine 132 
vitellinum (Ehrh.), Ach......... 162 perfoliatas, EI EE CS ead cnn sae 132 
PLANTAGINACES..... SUiscesteeusce 89 | Potentilla 
Plantago Anserina, 3 
eriopoda, Torr 89 arguta, Pursh 
Patagonica, Jacq 89 conanna, Richards so. <. 5 2... 4 
Pleuraphis, Torr 146 dissecta, Pursh ....- BSidn careetyeniene j 
sii, Torr 146 divsrsifolia, Lehm ...-...-.- Foon male ? 4 
Pleurogyne, Wselivs.. < va. ces see's tte 113 effusa, Dou ‘ 
ot iseb 113 | _fissa, Nutt 3 . 
TrUNOOss. tis). oto oe cee eese ees 3 i 
airoides, Nutt 149 | . glandulosa, Lindl..............- j i 
¥ 150 gracilis, Doug 4 4 
a, Nutt 150 Grayi, Watson ", i 
Ciisia, Sinithy 2260S 02625 See 150 Hippiana, Leh j ag 
So ihe i Rey Eg ee 150 | humifusa, Nutt ; 4 
enuifolia, Nutt 150 millegrana, Engelm...-..-----..- b 73 
Pogonatt MINGAS List gies Si rose sso eo > ‘s 
alpinum, 159 Norvegica, D t 
eapillare, Brid 159 Nuttallii, Lehm 4 Pe 
urnige Pennsylvanica, L ) 
Polanisia Plattensis, Nut y r 
ohysperma, T. & G.o.22 02.22. 11 |. procumbens; Clairv.. 2. 2. 525286 > q 
‘eiiglanlaioes, DC wits 3 § rigida, Nutt 7 
POLEMONIACES.....3.0..-.c0s2-00- 105 | _ rivalis, Nutt _ 
Polemoni ottia 
pitatum, Hook 108 | cavifolia, Hedw 156 
exruleum, L 168.) = Belen Sebp o2ccs oils ee ee 
confertum, Gray 108 imuls 
mile, “Willd. 126055. .- wes 108 | angustifolia, Torr ee 
pulchellum, Bunge 108 arin 
pulcherrima, Lehm 108 arryi, Gray ee 89 
Richardsonii, Grah 108 | PRIMULACE# .... ..J.- Coens ot 89 
Polygala Prunus { 
verticillata, L 19 aeeeeee Marsh sense. 8c. 33 7 
POT YCGALACRE & 1 Chie cas: a, 33 f 
POLYGONACEE.......:...... es 119 Pe eos L u 33 
Polygonu. — bo RA 33 
amphibium, L g 
3 e, ? — see phy: Nutt 222 vse _ 2 a 
ats ¥ 123 eryptocarpa, T. & G...--.------- 22 
umetorum, L 124 US] . Pursh 22 
erectum, L Bee 123 igitata, Nutt : 22 
imbricatum, Nutt 123 floribunda, oe . 22 
incarnatum, Ell 123 hypog ; 
Penneylvanicum, ee Beet 123 lcci, Push : 22 
y Mx 193 | Ptelea 
‘enie, ee 493 na, nonlin ONGH soc cnc cous sees 18 
viviparum, i; 423 bij swe 18 
= hed Armen 153 ming L . 13 
Polytrichadetphius per sre Nit ee 88 
yallii, oe Piitagro atis 3 
Polytrielun 3 eect Ginebra ee 
practic, Menzies - oso a 159 | Puecini 
juniperinum, Hedw-..--......... Ported Peck - 
levipil i 160 | Purshia, DC 34 
piliferum, Schreb .........2. eee). LOU tridentata ee 34 
Populus AE 
angulata, Ait 129 i 
angustifolia, James 129 Pyn tricata ecrep sibel er 
fe a, L 129 oo ee ee 88 
sreuttenoneion MEL are <8 sinner Swartz os 38 
Portulaca potuatitotil Le... es ee 
é —* L : 14 - secunda, L “ 88 
€) Sa, nge m : 4 : ti ea 
bajo Eck 24g | peemabee week 86 
