1953-1955 
Phlox 
bifida, 421, 435 
pilosa, 421, 435 
Phlox 
downy, 435; see also Phlox pilosa 
sand, 435; see also Phlox bifida 
Physalis 
heterophylla, 422, 436 
pubescens, 422, 436 
virginiana, 422, 437 
Physostegia 
angustifolia, 436 
virginiana, 422, 436 
Pickerel, 328 
grass, 328, 340 
little, 328 
mud, 328 
Pike, 328, 340 
grass, 328 
great northern, 328 
northern, 328 
Pikeperch, yellow, 329 
Pilodictis olivaris, 328; see also Belly, flat; 
Cat, Johnny, Morgan, shovelnose, and 
yellow; Catfish, flathead; Goujon; 
Hoosier; Mudcat 
Pimpernel, yellow, 433; see also Taenidia in- 
tegerrima 
Pinaceae, 415 
Pinus echinata, 413 
Pinweed, 433 
Plankton, 220, 223, 229 
Plant, marsh, 228 
Plantaginaceae, 422, 437 
Plantago 
aristata, 422, 437 
purshii, 422, 437, 441 
rugelit, 423, 437 
virginica, 423, 437 
Plantain, 437; see also Plantago 
bracted, 437; see also Plantago aristata 
hoary, 437; see also Plantago virginica 
Plants, prairie, 406 
Platydema ruficorne (associated with oak 
wilt), 305-6 
Platysoma lecontei (associated with oak wilt), 
305-6 
Plum, wild, 429 
Plunger, Des Moines, 328 
Poa 
compressa, 425 
pratensis, 388-9, 392-3, 397, 399, 401, 403, 
417, 425 
Poinsettia dentata, 402, 420, 432 
Polemoniaceae, 421, 435 
Polygala 
incarnata, 420, 432 
verticillata, 378, 383, 389, 420, 432 
Polygalaceae, 420, 432 
Polygonaceae, 418, 428 
Polygonum tenue, 418, 428 
Polyodon spathula, 328; see also Cat, spoon- 
bill; Paddlefish; Spoony 
Polypodiaceae, 415-6 
Polytaenia nuttallii, 402, 421, 433, 441 
Pomolobus chrysochloris, 328; see also Herring, 
blue and river; Shad, golden; Skip- 
jack 
INDEX 515 
Pomoxis 
annularis, 329; see also Crappie; Crappie, 
white; Newlight 
nigro-maculatus, 329; see also Bass, calico 
and strawberry; Crappie, black 
Pondweed, 254 
fennelleaf, 228 
leafy, 228; see also Potamogeton foliosus 
sago, 228 
Populus 
deltoides, 427 
grandidentata, 427 
tremuloides, 396, 427 
Porcellio rathkei (associated with oak wilt), 
310 
Possumhaw, 432 
Potamogeton, fine-leaved, 228 
Potamogeton 
foliosus, 228, 254 
nodosus, 228 
pectinatus, 228 
Potato, duck, 228 
Potentilla 
arguta, 419, 429 
simplex, 419, 429 
Prairie-clover 
purple, 431; see also Petalostemum purpur- 
eum 
white, 431; see also Petalostemum candidum 
Prairie-mimosa, 430; see also Desmanthus illi- 
noensis 
Prairie-parsley, 433; see also Polytaenia nut- 
tallit 
Prairie-tea, 432; see also Croton monanthogy- 
mus 
Primrose 
common evening, 433; see also Oenothera bi- 
ennis 
evening, 433; see also Oenothera laciniata 
Primulaceae, 421, 435 
Pristodactyla impunctata (associated with oak 
wilt), 305-6 
Prunella vulgaris, 436 
Prunus 
americana var. lanata, 429 
lanata, 429 
Psoralea, 401 
tenuiflora, 392-3, 398, 401-4, 409, 414, 419, 
431, 441, 443 
Psoralea, many-flowered, 431; see also Psora- 
lea tenuiflora 
Ptelea trifoliata, 431 
Purpletop, 426; see also Tridens flavus 
Purslane-speedwell, 437; see also Veronica 
peregrina 
Pussytoes, 438; see also Antennaria neglecta 
Pycnanthemum 
flexuosum, 436 
pilosum, 422, 436 
virginianum, 436 
Pyrus ioensis, 429 
Q 
Quercus 
alba (oak wilt of), 280; 428 
borealis (oak wilt of), 280 
macrocarpa (oak wilt of), 280; 428 
