902 INDEX. 
Page Page. 
Pteris—Continued. Pyrus angustifolia ___..._.-.------- 61, 71, 99, 122 
CETOPUNPUNCE 0 0.0000-eee ence ses sense 313 Botryapium . 2.2. eeeee eevee eee ee ee BAB 
catalogue .......- 312 catalogue .-cec-- 2 eee. eeeee ee eeeeeeeees | BMD 
Pterocamlon, catalogue... ...<<-2.<-cnnsss 790 246, 254, 256, 831 
POLYSTCR YUE oceans wewion seen eenerenn WO | feuehee ia oe oun sere ccu cace ncamncmesn 253 
pycnostachyum P00 | nalus 222 n cece c ce cece ce ceee eenece eee 831 
undulatum<icveesversessszerssessreore (120 |) QUT is uc aire cereies nemeucamcomenor yes 545 
Ptilimnium capillaceum ......-...-.-..--. 128 SONGUINCH...0--eeee eeee eects onan ee eee B45 
catalogue ....--.... 648 sinensis .....-..-2------2eseeeee ee 831 
Ptychomitrium . 291 | Pyxine ___o... eee eeeeee ences oes 264 
catalogue --. 300 Mab ORUC cccuen cons cusses secsees 281 
Puccinia andropogi- 187 MICtAge aoe he ce ates SEE 266 
andropogi ...-- 187 sorediata_._....___..-....-------------- 266 
catalogue . 187 | Pyxidanthera spathulata.....-..---------- 534 
coronata .. 190 
cyperi -_... . 189 # 
OMGCUlOtG . .cessscs oeceheeeuexeetss 190,191 | Quaking grass 
QTOMIUIME aoicsesscootensientasoceennees 189: | ‘Quamiasia)...... 0.05 -2..2scec nccsee de aseseses 
lateritia. 190 catalogue 
} WIUQUCISS.ccewaewsewsmenl cece thie coteooss 190 esculenta 
POR ica ass seman Se tne se ore eR ae aenee 191 hyacinthina ......---------------------- 440 
pruni-spinosae-.....-.---.------------- 256 | Quamoclit coccinea 67 
rubigovera -.-- 188 Mquamoclitiscs--cccacce.esceasacese 56 
silphii ... 188 vulgaris ..-.-.-----.6- 678 
tanaceti - 188 | Queen of the meadow 61 
virgata... 188 | Queen's delight --.-.---.---------2-------- 594 
wanthit -. 188 | Quercus 140, 157, 158, 
Pucciniaceae.....----..-- -- 185, 262 159, 162, 173, 177, 179, 180, 181, 195, 197, 199, 201, 
Pucciniastrum, catalogue. 185 202, 203, 204, 205, 206, 208, 212, 220, 238, 239, 250 
CROLONUS ie ce ocsintcee maicuiseicoaeedass scabs 185 acuminata .--.---.--------.- 32, 57,91, 469, 591 
691 alba .....-..-- 46, 60, 70, 77, 155, 165, 181, 192, 468 
520 WENO cureru emda dseayceebetiweceacuwee 469 
508 AQUATICA su. ccccceccossesaseneateadeseas 117 
690 aquatica ___....---------------------- 61,154, 
Purple love grass. ---- 380 161, 162, 166, 167, 177, 181, 192, 249, 250, 472, 833 
Punica granatum--..-......--.----------- 136, 832 boynitont .2ccnc cess cceracrcncskacescns OLD 
Purslane, common..--_-.......---.---------- 495 brevifolia ~ 154, 478, 822 
family brevilobata ......... 16, 41, 93. 100, 470, 591, 823 
SCA _...-- breviloba, correction of error ......-. 845 
water COSLON EU cassis ceewioe see uye ce 5 
Pumpkin, cheese eatalogue -....- 
large .....----- catesbaei......-.-.- 
Pycnanthemum cinered _.._-.------- 
albescens coccinea ......--..- 
aristatum hyssopifoliunr 698 tinctoria ..- 
hyssopifolium .........---+------+2----- 698 OUNETEN  cxansiumecnninisin ametyauwn eyes 
incanum albescens ._---..-.2--2-------- 699 digitata ............-. 32,46, 60, 87, 154, 254, 472 
linifolium....--- 698 QI8CO1OP 2eesenazecsseeaseessesecessyceee 
montanum .....- 699 QUANG soo erect: Se etencee cece nce 
~ nudum ...22...-- 698 CUPAN EM 6 sresecest seteuehesene cetes 
tullia .. 2. -2.-- 699 Saleata ...... 22... - 
Pylaisia, catalogue - 306 pagodaefolia 
Pylaisiella ...-.-.--. 291 hemisphaerica..........2--.2-+22------- 14 
Pyracantha..-...- 834 HStOPOWUVNS..cccrcccenenervaceeavacccs 473. 
Pyrenastrum .- 264 PUAUIIR 0520 on exsctocananieeesccen 
catalogue -.- 268 imbricaria 
Pyrenopsis.--...-----. 264 laurifolia_..... 
catalogue -...... nie lyrata -. 2.2.22 0222 cece econ ee eeee 46, 95, 100, 469 
melam bola. ess gee marylandica 47, 60, 154, 168, 167, 472, 822 
Pyrenopeziza, catalogue. 158 7 eaananaceae maar ee 
Pyrenulaiss-cesscciesssices 264, 266 maritima aad wc iin a ace aR oar oat 470 
catalogue -.....-..-- 267 michauxii...............-..- 46,61, 72, 470, 823 
. Pyrethrum maritimum . 813 Minor ..-.-..-.. 46, 60, 154, 166, 167, 192, 247, 469 
Pyrola family ......----- 652 MONON 02.2. eee cee ee nee ee ea enee cee 469 
maculata. ....- 652 mullenbergit...2...--+002eeneee eee eee 469 
Pyrolaceae........ 652 MYPtifOlia: sccees.ce ec sewcdeseecces 180, 473 
Pyrrhopappus...- - 754 nigra-_........222.....--..-.. 61,109, 154, 161, 
CUTOLLNTANUS .-- 2-20 ee neon nner cere eee ene 54 162, 166, 167,177, 181, 192, 249, 250, 472, 559, 833 
