Index 



631 



Peridermium, North American species 

 of, 403 



Peritoma Sonorae, 142 



Persea, 67, 69 ; gratissima, 67, 76 



icaria omissa, 57 

 Persimmons, Tannin cells of, 567 

 Persoonia Lesquereuxii, 173 



Phacelia ciliosa, 149; sericea ciliosa, 

 149 



Phaseolites manhassettensis, 176 

 Phaseolus, 32 



Phegopteris, 30, 476 ; reptans, 477 

 Phelipaea, 151 

 Phileozera multiflora, 157 

 Phlebodium aureum, 467 



Phlox, 221; depressa, 149; multiflora 

 depressa, 149 



Phoenix dactylifera, 261 ■ 

 Phryma caroliniensis, 242 

 Phymatodes, 603 ; exiguum, 458, 466 

 Physopella, 520 

 Phytolacca, 377 



Picea, 169, 405, 411; alba, 432; cana- 

 densis, 411, 429, 432; cliffwooden- 



i, 169; Engelmanni, 411, 425, 



426, 428, 432; excelsa, 169, 411, 430, 

 432; Mariana, 411, 426-428, 432; 

 Parryana, 411, 425; pungens, 425; 

 rubens, 427, 428, 432; rubra, 411. 



427, 428, 432; sitchensis, 411, 429 

 Picradenia, 156; macrantha, 156; 



multiflora, 157; odorata Osterhoutii, 



157; pumila, 156 

 Pieris phillyreifolia, 534 

 Pinites, 169 

 Pinus, 169, 295, 299, 329, 405-407, 



410, 413, 422, 520; australis, 415; 

 Banksiana, 423; contorta, 410, 421; 

 divaricata, 411, 423; echinata, 410, 



411, 416, 424; Elliottii, 410, 415, 457; 

 rilifolia, 410, 418; heterophylla, 415; 

 inops, 420 ; insignis, 410, 421 ; Jeff- 

 reyi, 410, 419; Laricio, 299; mitis, 

 416, 424; 'Murrayana, 410, 4 r 3, 4*9, 

 421; oocarpa, 411, 423; palustris, 



410, 411, 415, 416, 422, 519, 529, 533J 

 patula, 411, 423; ponderosa, 410, 411, 

 418, 421, 424, 514; rigida, 410, 4", 

 414, 417, 420, 423; scopulorum, 410, 

 413; serotina, 415, 524 '> Strobus, 

 424 ; sylvestris, 298, 410, 420 ; Taeda, 



410, 411, 413, 4i5, 422, 424, 5i9; 

 virginiana, 410, 411, 420, 423, 524 

 Piper, C. V. Notes on Calochortus, 



537 

 Piptostegia, 496 



Plagiochila Smallii, 131 

 Planera aquatica, 534; Ungeri, 310 

 Plants, Studies on color in, 77 

 Plants from the coastal plain of 



Georgia. 229 

 Plants from Florissant, Fossil, 307 



Platanus Kummelii, 174 



Platyschkuhria, 154; integrifolia, 



155; oblongifolia, 155 

 Pleospora magnifica, 221 

 Pleuroschisma prostratum, 129 



Pleurotaenium, 609 ; coronatum, 609 ; 

 Ehrenbergii, 609 



Pluchea, 154; borealis, 154; purpura- 



scens, 517 

 Podophyllum, 276 

 Podosemum, 230 



Poecilopteris, 604 ; crenata, 603-605 

 Pogonatum alpinum, 219 

 Pogonia ophioglossoides, 462 

 Poikilopteris, 504, 50, 604, 605 

 Pollen-tube in Houstonia coerulea, The 



behavior of the, 487 

 Pollen-tube in some of the Cucurbita- 



ceae, 327 

 Polybotrya, 603 ; articulata, 40 



Polygala nana, 533 



Polygonaceae, Studies in North Amer- 

 ican, 51 



Polygonella, 234 ; gracilis, 234 



Polygonum, 377 ; alpinum, 379 ; Bistorta 

 oblongifolium, 57; bistortoides, 57; 

 buxif orme, 56 ; littorale, 56 ; omis- 

 sum, 57; ramossissimum, 57; rubes- 

 cens, 56; scandens, 379; virginia- 



num, 377-386 b 

 rolygonum virginianum, The mechan- 

 ism of seed-dispersal in, 377 

 Polypappus, 154; sericeus, 154 

 Polypodium, 44 ; amplum, 198 ; angusti- 

 tolium, 192 ; binerve, 44 ; costatum, 

 192; hesperium, 191; orbiculatum, 

 45 ; palustre, 38 ; pectinatum, 465, 

 467 ; Plumula, 466, 467 ; polypodi- 

 oides, 458, 466; reticulatum, 198; 



vulgare, 191 

 Polystichum acrostichoides, 472 



Populus, 172, 517; acerifolia, 312; 

 aequalis, 312; apiculata, 172; bal- 

 samoides latifolia, 307 ; cordifolia, 



312; dakotana, 312; Heerii, 307; 

 laevigata, 312; Lesquereuxii, 307; 

 Newberryi, 312; Scudderi, 307; 



tremuloides, 517 



Poronia macrospora, 220 



Portulaca oleracea, 329 

 Potentilla, 143; anserina concolor, 143; 

 bipinnatifida, 143 ; bipinnatifida platy- 



loba, 143 ; ovalis, 143 ; platyloba, 

 143; prostrata, 143; rubricaulis, 143; 



rubripes, 143 



Pothos, 328 



Prenanthella, 160; exigua, i6x 



Prenanthes, 161; exigua, 161 

 Prionolejeunea, 3, 133 

 Proserpinaca, 238 ; palustris, 239 ; pec- 

 tinata, 239 ; platycarpa, 239 



Prosopis, 374 



