Voc. III. 
Psoralea 
melilotoides 2 364 
micrantha 361 
obtusiloba 361 
Onobrychis 365 
pedunculata 364 
stipulata 364 
tenuiflora 361 
Ptelea 2 444 
tomentosa 445 
trifoliata 445 
“ mollis 445 
Pteridium I 31 
aquilinum 32 
pseudocaudatum 32 
caudatum 31 
PTERIDOPHYTA 6 ie: 
Pteris 
alabamensis I 34 
aquilina 32 
atropurpurea 33 
Stelleri 32 
Pterospora 2 673 
Andromedea 673 
um 2 656 
(Discopleura) 
capillaceum 657 
missouriense 657 
Nuttallii 657 
tiloria 3 312 
(Stephanomeria) 
pauciflora 312 
Tamosa 312 
tenuifolia 312 
Puccinellia I 267 
(Glyceria in part) 
airoides 268 
angustata 267 
Borreri 268 
distans 267 
fasciculata 268 
maritima 267-8 
Pueraria 
Thunbergiana 2 420 
Pulmonaria 
see Mertensia 3 83 
maritima 82 
Pulsatilla 2 102 
(Anemone in 
part) 
hirsutissima 102 
patens 102 
Pycnanthemum 3 141 
see Koellia 141-5 
lanceolatum 142 
linifolium I41 
Monardella 132 
Torreyi ~ ‘143 
Tullia 144 
Pycraeus 
sabulosus I 300 
Pyrethrum 
Balsamita 3 519 
inodorumnanum 520 
PyRoLACEAE 2 667 
Pyrola 2 668 
americana 668 
asarifolia 670 
chlorantha 669-70 
elliptica 669 
grandiflora 668 
incarnata 669 
maculata 672 
minor 670 
oxypetala 670 
rotundifolia 668 
“ pumila 668 
secunda 671 
uliginosa 669 
“ pumila 671 
umbellata 672 
uniflora ~ 671 
GENERAL INDEX OF LATIN GENERA 
Pyrrhopappus 
carolinianus 3 324 
Scaposus 325 
aria I 640 
oleifera 641 
pubera 641 
2 287 
arbutifolia 290 
“atropurpurea 291 
americana 287 
angustifolia 288 
baccata 289 
Botryapium 292 
communis 288 
coronaria 288 
10ensis 289 
Malus 288-90 
melanocarpa 291 
nigra 291 
sanguinea 293 
see Sorbus 287 
Malus 288 
Pyxidanthera 2 706 
barbulata 706 
Quamasia I 508 
(Scilla) 
esculenta 509 
hyacinthina 509 
Quamoclit 3 42 
coccinea 42,3 
Quamoclit 42 
vulgaris 42 
Quercus I 616 
acuminata 624 
alba 622 
Alexanderi 625 
aquatica 621 
bicolor 623 
borealis 618 
Brittoni 620 
Catesbaei 616 
coccinea 619, 18 
“ tinctoria 619 
digitata 617,19 
elipsoidalis 618 
falcata 619 
“pagodaefolia 620 
heterophylla 621 
ilicifolia I 620 
imbricaria 622 
laurifolia 621 
Leana 622 
lyrata 623 
macrocarpa 622-3 
margaretta 622 
marylandica 620-2 
Michauxii 624 
minor 622 
Muhlenbergii 624, 5 
nana 620 
nigra z 62% 
“ digitata 619 
“ tridentata 622 
obtusiloba 622 
olivaeformis 623 
pagodaefolia 620 
palustris 617-22 
Phellos 621 
platanoides 623 
prinoides 625 
“rufescens 625 
Prinus 22-4 
Robur 616 
rubra I. 617 
“nana 620 
“runcinata 617 
Rudkini 620 
Schneckii 618 
stellata 622 
texana 618 
tinctoria 619 
AND SPECIES. 
Quercus 
tridentata I 622 
triloba 619, 17 
velutina 619 
virens 625 
virginiana 625 
Queria 2 30 
canadensis 30 
capillacea 30 
Quinaria 2. $10 
Quincula 3 162 
(Physalis in part) 
lobata 162 
Radicula 2 159 
aquatica 164 
curvisiliqua 162 
hispida 161 
Nasturtium-aquat- 
icum 162 
obtusa 160 
palustris 161 
sessiliflora 162 
sinuata 160 
sphaerocarpa 161 
sylvestris 160 
Radiola 
linoides 2 440 
Raimannia 2 596 
coronopifolia 598 
humifusa 597 
laciniata 597 
rhombipetala 597 
Rajania ovata I 677 
RANUNCULACEAE 2 84 
Ranunculus 2 104 
abortivus 110 
“ encyclus 110 
“ Harveyi 109 
“ micranthus 110 
leni 109 
acris Il1-2 
affinis 108 
alismaefolius 107 
allegheniensis 110 
ambigens 107 
aquatilis 116 
“ caespitosus 116 
“ capillaceus 116 
“ divaricatus 116 
arvensis IIs 
auricomus 104 
bulbosus 112 
cardiophyllus 108 
circinatus 116 
Clintoni 5t3 
Cymbalaria i077 
delphinifolius 105, 17 
“ terrestris 105 
eremogenes III 
fascicularis 114 
Ficaria 117 
filiformis 107 
Flammula 107 
“reptans 107 
“ intermedius 107 
Harveyi 109 
hederaceus 116 
hispidus 113 
hispidus 112 
hyperboreus 2 105 
lacustris 105 
lapponicus 106 
limosus 105 
Macounii 112 
micranthus 110 
missouriensis 105 
multifidus 105 
“ repens 105 
muricatus Tis 
nivalis 107 
. oblongifolius 106 
591 
Ranunculus 
obtusiusculus 2 107 
ovalis 109 
parviflorus 114 
parvulus 114 
pedatifidus 108 
pennsylvanicus 112 
Philonotis 114 
Purshii 105 
pusillus 106 
pygmaeus 108 
recurvatus III 
repens 112, 3 
Teptans 107 
rhomboideus 109 
Sabini 108 
sceleratus Trt 
septentrionalis 113 
sicaeformis ¥u3 
trichophyllus 116 
Raphanus 2 194 
Raphanistrum 195 
sativus 194-5 
Rapistrum 
rugosum 2 159 
Ratibida 3 473 
(Lepachys) 
columnaris 474 
pinnata 474 
Tagetes 475 
Razoumofskya 1 638 
(Arceuthobium) 
pusilla 638 
Redfieldia I 235 
flexuosa 236 
Relbunium 
bermudense 3 206 
Renaelmia 
usneoides I 456 
RESEDACEAE 2 199 
Reseda 2 200 
alba 201 
lutea 200 
Luteola 200 
odorata 200 
RHAMNACEAE 2 501 
Rhamnus 2 502 
alnifolia 503 
caroliniana 503 
cathartica 502 
Frangula 503 
lanceolata 503 
Rhexia 2 582 
aristosa 583. 
ciliosa 584 
latifolia 583 
mariana 583 
petiolata 584 
virginica 000 
Rhinanthus 3 223 
Crista-galli 223 
major 223 
minor 223 
virginicus 208 
Rhodiola 2 206 
rosea 206-7 
RHODODENDREAE 2 676 
Rhododendron 2 680 
arborescens 679 
calendulaceum 678 
canadense 680 
canescens 678 
catawbiense 681 
ferrugineum 680 
lapponicum 680 
maximum 681 
nudiflorum 678 
Rhodora 680 
ViSCOSUM 679 
Rhodora 2 679 
canadensis 680 
Rhombolytrum 1 238 
