148 
Plantago spinulosa 50 
Platystemon californicus 92 
Poa compressa 106 
epilis 70 
interior 70 
laevigata 70 
pratensis 106 
Sheldonii 70 
triflora 106 
Polanisia graveolens 72 
Polygonum amphibium 112 
aviculare 112 
bistortoides 112 
Convolvulus 112 
exsertum 71 
Hartwrightii 35 
incarnatum 35 
lapathifolinm 113 
Paronychia 90 
Muhlenbergia, Volume 9 
Potentilla pennsylvanica 73 
Prunella vulgaris 126 
Prunus emarginata 94, 119 
Pseudotsuga mucronata 80 
taxifolia 86, 104 
Psilocarpus tenellus 132 
Psoralea lanceolata 37 
linearifolia 49 
~Pteridium aquilinum 85, 103 
Pterospora andromedea 124 
Pyrola bracteata 124 
incarnata 123 
picta 124 
secunda 123 
uliginosa 74 
Pyrus fusca 94' 
occidentalis 119 
rivularis 119 
sitchensis 119 
pennsylvanicuin 36 Puccinellia airoides 34 
Persicaria 113 
punctatum 36 
Polypodium occidentale 1o2 
Scouleri 84, 1o2 
angustata 107 
Quercus Douglasii 52 
spergulariaeforme 112 
Garryana 112 
lobata 39 
Radicula lyrata 72 
Polystichum munitum 85, 1o3 Ranunculus Bongardi 91, 115 
Populus occidentalis 35 
tremtloides 111 
trichocarpa 89, 111 
Potaniogeton amplifolius 1o5 
natans 86 
Nuttallit los 
perfoliatus los 
eremogenes 72 
flammula 91, 114 
pennsylvanica 115 
Purshii 114 
repens 114 
sceleratus 115 
Raphanus Raphanistrum 116 
sativus 116 
zosteraefolius 105 
Potentilla biennis 73 
leucocarpa 58 
Rapuntium Dortmanna 129 
Ratibida columnaris 52 
monspeliensis 11g Rhamnus Purshiana 95, 121 
