218 MISSOURI BOTANICAL GARDEN. 
Ornithogalum texanum 
see Camassia Fraseri 149 
Othake roseum 179 
Oxalis Drummondii 162 
as O. vespertilionis 158 
Oxybaphus pilosa 51 
=Allionia pilosa Rydb. 
Oxytropis Lamberti 177 
Palafozia Hookeriana 41 
= Polypteris Hookeriana Gray 
terana 14 
see Polypteris texana 
Panicum capillare 299 
Curtisii 156 
giganteum 
see P. virgatum 156, 199 
hirtellum 30 
see Oplismenus undulatifolius 
lachnanthum 156 
Lindheimeri 151, 199 
pedicellatum 199 
proliferum 199 
Reverchoni 199 
virgatum 156, 199 
Paronychia dichotoma 33, 152, 188 
Drummondii 5, 31 
Lindheimeri 152, 188 
setacea 5 
Parthenium Hysterophorus 226, 179 
Paspalum distichum 199 
plicatum 151 
sericeum 
see Hriochloa sericea 151 
Passifiora affinis 233, 170 
tenuiloba 192 
Pavonia lasiopetala 162 
as P. Wrightii 161 
Pellaea dealbata 200 
flexuosa 200 
Pentstemon Cobaea 19 
Murrayanum 46 
Petalostemon multiflorum 7 
obovatum 7, 31 
phleoides microphyllum 7 
violaceum 7, 176 
Phacelia congesta 144, 183 
parviflora hirsuta 
as P. hirsuta 18, 46 
patuliflora 145 
as Hutoca patuliflora 45 
strictiflora 
as Hutoca strictiflora 45 
Phaseolus diversifolius 170 
retusus 170 
Philibertia crispa 182 
cynanchoides 182 
Phlox Drummondii 44 
pilosa texana 183 
Roemeriana 144, 183 
Phoradendron californicum 213 
flavescens 
as P. villosum 212 
flavescens glabriusculum 212 
flavescens orbiculatum 212, 189 
flavescens pubescens 212, 189 
juniperinum 213 
lanceolatum 213 
tomentosum 212 
villosum 212 
see P. flavescens 
Phyla incisa 
see Lippia cuneifolia incisa 186 
Phyllanthus polygonoides 26, 191 
Physalis pubescens 19 
=P. viscosa spathulaefolia Gray 
Physostegia intermedia 49 
virginiana var. 20 
Pilinophytum capitatum 53 
=Croton capitatus Michx. 
Lindheimeri 24 
=Croton Engelmanni Ferg. 
Pinaropappus roseus 232, 179 
Pistia Stratiotes 196 
Plantago aristata 22 
gnaphalioides 22 
==P. inflexa Morris (type) 
Helleri 188 
inflexa 
as P. gnaphalioides 22 
occidentalis 188 
Wrightiana 147, 188 
Platanus occidentalis 193 
Pluchea camphorata var. 224 
purpurascens 179 
Poa capitata 31 
=Dragrostis hypnoides BSP. 
Polanisia trachysperma 150 
Polygala alba 165 
incarnata 3 
leptocaulis 3 
=P. paludosa St. Hil. 
Lindheimeri 150 
paludosa 
as P. leptocaulis 3 
Polygonella americana Small 
as P. ericoides 22, 23 
parvifolia Michx. 
as P. polygama 23 
Polygonum cristatum 51 
hydropiperoides 189 
lapathifolium 189 
ramosissimum 189 
scandens 154 
