v) 



Douglasii . 551 



POLEMONIACEAE 449 



POLEMONIUM 461 



amoenum • 463 



carneum 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 

 alpinum 

 Var. foliosum 



576 



577 

 577 



Var. Alaskanum 578 



amphibium 



Austinae 



aviculare 



bistortoides 



Californicum 



convolvulus 



Davisiae 



Douglasii 



dumetorum 



Engelmanni 



erectum 



Greenei 



Ha/rt;wrightii 



Howellii 



Hydropiper 



hydropiperoides 



Kelloggii 



lapathifolium 



Var. incanum 



lineare 



littorale 



majus 



minimum 



montanum 



Muhlenbergii 



Newberryi 



nodosum 



Nuttallii 



paronychia 



Parryi 



578 

 583 

 581 

 577 

 584 

 585 

 578 

 582 

 585 

 582 

 581 

 584 

 579 

 582 

 580 

 580 

 583 

 579 

 579 

 583 

 581 

 583 

 581 

 582 

 579 

 578 

 579 

 583 

 580 

 584 



INDEX 



Shastensis 581 

 spergulariae- 



forme 583 



viviparum 577 



Watsoni 584 



POLYPOGON 724 



littoralis 725 



Monspeliensis 724 



POMA^EAE 163 



PONTEDER- 



IACEAE 666 



POFULUS 622 



alba 622 



angustifolia 622 



balsamifera 622 



deltoides 623 



tremuloides 623 



trichocarpa 622 



PORTULACACEAE 90 



PORTULACA 90 



oleracea 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 



Pennsylvanicum 579 

 Persicaria 580 



phytolaccaefolium 578 

 polygaloides 584 



ramosissimum 582 

 Sawatchense 582 



praelongus 



675 



pulcher 



674 



pusillus 



676 



Robbinsii 



676 



zosteraefolius 



675 



DTENTILLA 



175 



Anserina 



179 



brevifolia 



178 



ciliata 



175 



Drummondii 



177 



fissa 



176 



flabelliformis 



178 



flabellifolia 



178 



fruticosa 



179 



gracilis 



178 



glandulosa 



176 



glutinosa 



175 



lateriflora 



177 



millegrana 



177 



Monspeliensis 



176 



Newberryi 



177 



Pacifica 179 



reflexa 176 



rhomboidea 176 



rivalis 177 



villosa 178 



Wrangelliana 176 



PRIMULACEAE 431 



PRIMULA 434 



Broadbeadae 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 14^ 



Purshii 141 



PSILOCARPHUS 325 



brevissimus 326 



elatior 326 



tenellus 326 



Oreganus 326 



PSILONEMA 52 



calycinum 52 



PTEROSPORA 427 



Andromedea 428 



PTEROSTEGIA 576 



drymarioides 576 



PTILOCALAIS 390 



major 390 



nutans 390 



PTILCTRIA 388 



paniculata 389 



exigua 389 



tenuifolia 389 



virgata 389 



PUCCINELLIA 754 



angustata 754 



distans 754 



Lemmoni 754 



maritima 754 



PYROLACEAE 423 



Pl'ROLA 424 



aphylla 425 



Var. paucifolia 425 



bracteata 425 



chlorantha 424 



elliptica 425 



minor 424 



picta 425 



