INDEX 



Douglasii 551 

 POLEMONIACEAE 449 



POLEMONIUM 461 



amoenum j 463 



earneum 462 



confertum 463 



elegans 461 



foliosissimum 462 



humile 461 



luteum 463 



micrantha 461 



occidentale 462 



pectinatum 462 



pulchellum 462 



POLYGALEAE 72 



POLYGALA 73 



Californica 73 



POLYGONACEAE 567 



POLYGONUM 576 



alpinum 577 



Var. foliosum 577 



Var. Alaskanum 578 



amphibium 578 



Austinae 583 



aviculare 581 



bistortoides 577 



Californiqum 584 



convolvulus 585 



Davisiae 578 



Douglasii 582 



dumetorum 585 



Engelmanni 582 



erectum 581 



Greenei 584 



Ha<rt,wrightii 579 



Howellii 582 



Hydropiper 580 



hydropiperoides 580 



Kelloggii 583 



lapathifolium 579 



Var. incanum 579 



lineare 583 



littorale 581 



majus 583 



minimum 581 



montanum 582 



Muhlenbergii 579 



Newberryi 578 



nodosum 579 



Nuttallii 583 



paronychia 580 



Parryi 584 



Pennsylvanicum 579 



Persicaria 580 

 phytolaccaefolium 578 



polygaloides 584 



ramosissimum 582 



Sawatchense 582 



Shastensis 581 

 spergulariae- 



forme 583 



viviparum 577 



Watsoni 584 



POLYPOGON 724 



littoralis 725 



Monspeliensis 724 



POMAcEAE 163 



PONTEDER- 



IACEAE 666 



POPULUS 622 



alba 622 



angustifolia 622 



balsamifera 622 



deltoides 623 



tremuloides 623 



trichocarpa 622 



PORTULACACEAE 90 



PORTULACA 90 



olefacea 91 



POTAMOGETON 674 



alpinus 674 



amplifolius 674 



foliosus 676 

 Var. Californicus 676 



heterophyllus 675 



lonchites 675 



natans 674 



Nuttalli 674 



pectinatus 676 



perfoliatus 675 

 Var. Richardsonii 675 



praelongus 675 



pulcher 674 



pusillus 676 



Robbinsii 676 



zosteraefolius 675 



POTENTILLA 175 



Anserina 179 



brevifolia 178 



ciliata 175 



Drummondii 177 



fissa 176 



flabelliformis 178 



flabellifolia 178 



fruticosa 179 



gracilis 178 



glandulosa 176 



glutinosa 1? 5 



lateriflora 177 



millegrana 177 



Monspeliensis 176 



Newberryi 177 



Pacifica 179 



reflexa 176 



rhomboidea IV 6 



rivalis 177 



villosa 178 



Wrangelliana 176 



PRIMULACEAE 431 



PRIMULA 434 



Broadheadae 434 



Var. minor 434 



Cusickiana 434 



PROSARTES 658 



PRUNUS 161 



Oregana 161 



subcordata 161 



PSEUDOCYMOP- 



TERUS 258 



anisatus 258 



PSEUDOTSUGA 788 



Douglasii 788 



PSORALEA 141 



lanceolata 141 



melilotoides 142 



physodes l<i. 



Purshii 141 



PSILOCARPHUS 325 



brevissimus 326 



elatior 326 



tenellus 326 



Oreganus 326 



PSILONEMA 52 



calycinum 52 



PTEROSPORA 427 



Andromedea 428 



PTEROSTEGIA 576 



drymarioides 576 



PTILOUALAIS 390 



major 390 



nutans 390 



PTILORIA 388 



paniculata 389 



exigua 389 



tenuifolia 389 



virgata 389 



PUCCINELLIA 754 



angustata 754 



distans 754 



Lemmoni 754 



maritima 754 



PYROLACEAE 423 



P*'RQLA 424 



aphylla 425 



Var. paucifolia 425 



bracteata ,425 



chlorantha 424 



elliptica 425 



minor 424 



picta 425 



