808 
Phylloxera Caryaesepten 357 
Physalis alkekengi 326, 566 
Physcia leucoleiptes (Tuck.) Lett. 5 
Physcomitrella patens 733 
— patens x Füunaria hygrometrica 
685 
Physcomitrium longicollum 691 
— megalocarpum 733 
— pygmaeum James 696, 733 
— turbinatum Langloisii 733 
Physedra chaetocarpa 395 
Physma 4 
Physolinum Printz N. @. 157, 217 
— monile 157 
Physostigma venenosum 569 
Phytelephas 253, 310 
— macrocarpa 308 
Phytimophora 113 
Phytolacca 335 
— americana 335 
Phytophthora parasitica 594 
Piaropus paniculatus 429 
Pica 326 
— pica 476 
Pilgeria 44 
Pilobolus 491 
Pilocarpon N. A, 16 
Pilopogon 706 
— Blumei 733 
Pilotrichella 706 
Pilotrichum 706 
— Leoni Williams* 
Pilularia 477 
Pinguieula 611 
— vulgarıs 458 
Pinnatella 716 
— intralimbata 716 
Pinnularia 39, 67, 69, 70, 
N. A. 199 
— Balfouriana 69 
— eurta Cleve 197 
— Gandrupii 167 
— madagascarensis Amosse* 66 
— trigonocephala Cleve 196 
Pinus 326 
— Banksiana 600 
—- montana 522 
— ponderosa 325 
— — var. scopulorum 325 
706 
139. — 
Phylloxera Caryaesepten—Platanus occidentalis 
Pinus resinosa 591 
— silvestris 487, 600 
— strobus 583, 591 
Pirola uniflora 455 
Pirolaceae 385 
Pirus malus 560 
Pisum 302 
— sativum 257, 282, 535 
Piteairnia flavescens 486 
Piteairnieae 489 
Pithophora heterospora Howe et Her- 
vey* 163 
— sumatrana 88 
Placosphaera N. A. 218 
Plagiochasma 643 
— appendiculatum L. et L. 643 
— crenulatum Gottsche 697 
— Muenchianum Steph. 697 
Plagiochila 687, 705 
— asplenioides 649 
— dominicensis Tayl. 706 
— Magdalena Gottsche 706 
— opposita Nees 714 
— punctata 687 
— Smallii Evans 698 
ne spinulosa 663, 687 
— Stableri 720 
Plagiogramma N. A. 199 
— zanzibaricum Amosse* 155 
Plagiopus Oederi 684 
Plagiotheciopsis Broth. 713 
Plagiothecium denticulatum 723 
— — var. myurum 669 
— elegans 669 
— Müllerianum 694 
Plantaginaceae 481 
Plantago 348, 443 
— sect. Leucopsyllium 443 
—. sect. Novorbis 443, 456 
— sect. Plantaginella 443 
— lanceolata 443 
— major L. f. phyllostachya Wallr. 
295 
— maritima 442 
Plasmodiophora brassicae 270 
Platanaceae 280, 298 
Platanus 279, 431 
— acerifolia 279 
— oceidentalis 279 
