26 
Annals of Botany . 
Phytophthora erythroseptica, morphology 
and cytology of sexual organs, 28 , 735. 
Picea, spp., seedling-structure (*), 23 , 196. 
Picris echioides, seedling-structure, 28 , 322. 
Pilacre and Roesleria pallida, relationship 
(*), 30 , 4 1 1. 
Pilocereus, spp ., seedling-structure (*), 24 , 
141. 
Pinus, chromosome formation and distribu- 
tion (*), 22, 536 ; homotype mitosis (*), 
22, 540 ; prophase (*), 22, 530. 
— leaf-structure of Cretaceous species (*), 
22, 207. 
— spp., seedling-structure (*), 23 , 199. 
— granulata, n. comb., description (*), 25 , 
9 ° 5 . 
— Inops, development of Sanio’s bars (*), 
30 , 419. 
— maritima, abnormal prothallus (*), 26 , 
943 - 
— yezoensis, n. sp., description, 24 , 400 ; 
leaf-anatomy (*), 24 , 399. 
Pisum sativum, heterotypical reduction in 
somatic cells (*), 24 , 793 ; influence of 
temperature on rate of growth (*), 30 , 25. 
Pitostrobus macrocephalus, a Tertiary cone 
showing ovular structures (*), 30 , 529. 
— - — anatomical details : bract scales (*), 
30 , 535 ; cone axis (*), 30 , 533 ; female 
gametophyte and embryo (*), 30 , 541 ; 
integument (*), 30 , 537 ; male gameto- 
phyte (*), 30 , 542 ; nucellar column (*), 
30 , 540; nucellus (*), 30 , 538; ovule (*), 
30 , 537 ; ovuliferous scale (*), 30 , 536. 
— — diagnosis, 30 , 547. 
Pittosporum crassifolium, seedling-anatomy 
(*), 28 , 725. 
Pityoxylon with marginal tracheides, a Cre- 
taceous (*), 25 , 315. 
Plagiogyria, anatomy (*), 24 , 428 ; descrip- 
tion (*), 28 , 366 ; external characters (*), 
21 , 426; phylogeny (*), 24 , 423; 28 , 
415 ; sorus and sporangia (*), 24 , 438. 
Planoxylon, n. gen ., diagnosis, 30 , 119. 
— Hectori, comparison with other fossils, 
30 , 1 16; description (*), 30 , m ; diag- 
nosis, 30 , 120. 
— Lindleii, diagnosis, 30 , 120. 
Plant communities of farm land, 30 , 16 1. 
— formations from the arid regions of 
Western China, 26 , 1105. 
Plantago lanceolata, insect visitors, 22 , 648 ; 
proliferous form of scape (*), 30 , 353. 
Plasmodiophoraceae and their relationship 
to Mycetozoa and Chytrideae (*), 28 , 227. 
— Ostendfeldiella, a new genus of (*), 28 , 
643. 
Plasmolysis studied under dark-ground 
illumination (*), 28 , 618. 
Platanus, spp., seedling-anatomy, 28 , 725. 
— orientalis, anatomy of leaf-fall, 25 , 86. 
Platycerium, anatomy (*), 29 , 507 ; sporan- 
gia (*), 29 , 519 ; sporophyll (*), 29 , 510. 
Platycerium, grape sugar excreted by (*), 
25 , 1205. 
— biforme, relationship with ants, 24 , 469. 
Platyspermum, n. gen., description (*), 28 , 
87, 95 * 
— elongatum, description (*), 28 , 96. 
— Kidstoni, n. sp., description (*), 28 , 96. 
— multistriatum, description (*), 28 , 96. 
— rugosum, n. sp., description (*), 28 , 96. 
Platystemon, californicus, seedling-anatomy, 
28 , 719 * 
Plectocomia branching, 21 , 417. 
Podocarpeae, affinities (*), 27 , 63 ; embryo- 
logy (*), 26 , 484 ; 27 , 54 ; external 
features, 26 , 445 ; female fructification 
(*), 26 , 462 ; 27 , 41 ; female gametophyte 
(*), 26 , 477 ; 27 , 54 ; fossils, 26 , 486 ; 
genera and species, 26 , 445 ; geographical 
distribution, 26 , 485 ; inter-relationship of 
genera and species (*), 26 , 489 ; leaf (*), 
26 , 453 ; male cone (*), 26 , 459 ; 27 , 
41; male gametophyte (*), 26 , 479; 27 , 
52; phylogeny, 26 , 496; root, 26 , 458 ; 
root nodules, formation and physiology 
(*), 26 , 80 r ; seedling-structure (*), 22, 
694 ; 26 , 485; stem (*), 26 , 449. 
Podocarpoxylon, anatomy of wood (*), 27 , 542 . 
Podocarpus, development of female strobilus 
(*), 26 , 5i5. 
— bracteata, strobilus : histology (*), 26 , 
548 ; morphology, 26 , 548. 
— chinensis, seedling-anatomy (*), 22, 694. 
— dacrydioides, strobilus : histology (*), 26 , 
532 ; morphology (*), 26 , 532. 
— elata, strobilus: histology (*), 26 , 545 ; 
morphology (*), 26 , 544. 
— ferruginea, strobilus : histology (*), 26 , 
542 ; morphology (*), 26 , 541. 
— Hallii, strobilus : histology (*), 26 , 
555 I morphology, 26 , 555. 
— imbricata, strobilus : histology (*), 26 , 
527; morphology (*), 26 , 525. 
— neriifolia, strobilus : histology (*), 26 , 
550 ; morphology, 26 , 549. 
— nivalis, strobilus (*), 26 , 557. 
— polystachya, strobilus : morphology (*), 
26 , 546 ; histology (*), 26 , 546. 
— saligna, description, 26 , 551. 
— spicata, strobilus : histology (*), 26 , 540 ; 
morphology (*), 26 , 537. 
— spinulosus, structure (*), 24 , 305 : female 
fructification (*), 24 , 310 ; leaf, 24 , 307 ; 
male cone (*), 24 , 307 ; pollen (*), 24 , 
308 ; stem, 24 , 306. 
— Totara, strobilus : histology (*), 26 , 553 ; 
morphology (*), 26 , 551. 
— vitiensis, strobilus (*), 26 , 533 ; histo- 
logy (*), 26 , 536; morphology (*), 26,534. 
Podophyllum Emodi, seedling-anatomy, 28 , 
708. 
— peltatum, heterotypic chromosomes in 
pollen mother-cells (*), 21, 310 ; vascular 
anatomy (*), 22, 673. 
