INDEX. 



901 



Pagt.'. 

 Poplar— Continued. 



silver-leaf - 4(35 



white 833 



yellow 84,506 



Poppy family.- 520 



prickly 520 



Populus . 43 



alba 833 



angulata 465 



carol inetisis - 465 



catalogue 464 



deltoides 185 



grandidentata 185 



heterophylla 185 



inonilifera - 185,465 



Porella 285 



catalogue 288 



involutu -- 288 



Poria, catalogue - - 206 



Poronia, catalogue 182 



Porot helium, catalogue 213 



Porotrichum, catalogue 308 



Porteranthus, catalogue 539 



stipulaceus 75.93 



trif oliatus 75 



Por tulaca, catalogue 495 



oleracea_ 55, 152 



Portulacaceae 495 



Post-oak prairies 98 



Potamogeton, catalogue 327 



crispus 127 



diversifolius 126 



Jiuitans 327 



hybridus 127 



hybridus 328 



lonchites 127 



nutans 327 



perfoliatus 127,329 



pinnatum 639 



pusillus 127 



spp 49 



rufescens 327 



tenuissirnus 328 



Potato .- 31 



wild 680 



Potatoes, Irish 69,80,828 



sweet 80,110,134,822,828 



Potentilla, catalogue 542 



durandii 541 



simplex 542 



Pottiaceae. 299,809 



Poverty grass 124,364 



Prairie lielt, root and forage crops 823 



vegetation and soil 823 



region «» 



Prairies 48 



Prenunthes 755 



altissinia 756 



crepidinea 755 



crepidinea 7.55 



deltoidea 756 



serpen tariu - 755 



barbata 7.55 



Prickly ash, southern 102.587 



pear 133,630 



poppy, Mexican '>20 



Pride of China ;">ss 



Page. 



Primrose 823 



evening.. 634,637,638 



family 661 



Primulaceae 661 



Prinos ambignns 603 



coriaceus _ 601 



glaber 604 



montanus 603 



verticillatits 604 



Privet 57 



Carolina 6a3 



evergreen ^ 835 



Japan 835 



Japanese 136 



mountain , 603 



southern 57, 102 



swamp 667 



Procumbent Polypremum 669 



Prosartes 441 



lanuginosa 441 



Proserpinaca, catalogue 639 



palustris 639 



sp 193 



Prosthemium, catalogue 257 



Protococcales - 146 



Prunella, catalogue 705 



vulgaris 257 



Prunus 201,211 



americana ... 57, 61, 83, 85, 165, 172, 189, 551, 833 



angustif olia 154, 172, 189, 208, 251, 831 



avium - 240 



caroliniana 171,834 



catalogue 551 



cerasus 165 



chicnsa 551 



hiemalis 551 



injucunda 62 



maritima 551 



serotina 61,84,154,163, 



172. 189, 209, 2.)0, 251, 254, 260, 261, .552 



tnontana 552 



ueomontana 62 



sp 251,257 



triflora.... 154,172,235,832 



umbellata 90,122,172 



Psammophytes 129 



Psammophytes 129 



Psathyrella, catalogue 222 



Pseudauliscus, catalogue 143 



Pseudoheloiium saccharifernm 158 



Psilopezia, catalogue 155 



Psoralea 88 



canesoens 115 



catalogue 562 



dalea 564 



eglandxdosa 563 



meliloioides 563 



pedunculata 67 



simplex 116 



Psylocybe, catalogue 222 



Ptelea, catalogue 587 



monoplujlla 600 



sp : 194 



trifoliata 99,108,194 



Pteridophyta 312 



Pteridophytes - 48,49 



Pteris alabamensis 312 



aquilina 123 



