780 INDEX 
Prunus armeniaca, 534 Putrefaction, 364 
Avium, 534 Pycnanthemum montanum, 59% 
Cerasus, 95, 535 Pycnia, 401 
Fig. of flower, 270 Pyrenoid, 337, 341 
domestica, 536 Pyrenomycetales, 395 
Laurocerasus, 536 Pyrethri Flores, 615 
serotina, 534 Pyrethrum, 615 
Prunus Virginiana, 535 Pyrogallol, 507 
Psalliota campestris, 405 Pyrola, 580 
Pseudobulbs, 188 Pyrus, 535 
Pseudocarp, 298 Pyxidium, 301 
Pseudomonas, 372 Pyxis, 301 
Pseudomonas radicicola, 176 
Fig. of, 178 Quassia, 547 
Pseudopodia, 26, 374 Quassia amara, 546, 647 
Pseudotsuga, 465 Quercus, 507 
Pseudotsuga taxifolia, 466 Quercus alba, 506, 507 
Psyllium seeds, 95, 602 chrysolepis, 506 
_ Ptelea, 545, 546 infectoria, 507 
Ptelea trifoliata, 546 Fig. of, 505 
Pteridophyta, 13, 431 Michauxii, 506 
Pteridophytes, 13, 431 occidentalis, 506 
Pteris aquilina, 433 pedunculata, 15 
cross section of rhizome, 435 platanoides, 506 
Pteris, Fig. of leaf of, 434 prinus, 506 
Fig. showing development of em- Suber, 506 
bryo, 72 velutina, 506 
Pterocarpus marsupium, 540 virginiana, 506 
 santalinus, 539 Quillaja, 535 
Pterospora, 580 Quillaja Saponaria, 88, 634, 535 
Puccinia Graminis, 399 Quillworts, 431, 442 
Fig. of, 400 Quince, 535 
Puccinia malvacearum, 401 calyx of, 267 
Puff Balls, 409 fruit of, 305 
Pulmonaria officinalis, 593 pericarp of, 298 
Pulsatilla, 518 receptacle of, 297 
Pulsatilla patens, 519 Quinidinz Sulfas, 605 
pratensis, 519 Quinina, 605 
vulgaris, 519 
Pulvinus, 243 Raceme, 258 
Pumpkin, 607 Rachilla, 259, 484 
Punica, 571 Rachis, 233, 256 
Granatum, 571 _ Radial bundles, 142 
Punicacea, 571 Radicle, 311, 317, 321 
Purging Cassia, 332 Radish, 161, 162 
Purified Siliceous Earth, 350 Ragweeds, pollen of, 283 
Purple Cone-flower, 612 Ranales, 515 
Putamen, 298 Ranunculacea, 243, 515, 618 
