28 
Annals of Botany. 
Proteins, role of, in absorption of acids by 
potato cells, 30 , 233. 
Prothallus of Equisetum debije (*), 28 , 163 ; 
of Lepidodendron Veltheimianum (*), 24 , 
821 ; of Pinus maritima, abnormal (*), 
26 , 943. 
— production of male in sporangia of Todea 
(*), 22,231. 
Protobrachyoxylon eboracense, anatomy of 
wood (*), 27 , 541. 
Protococcales, cytology (*), 30 , 459, 467. 
Prunus, spp., gummosis (*), 25 , 107, 116; 
leaf-fail anatomy, 25 , 84 ; seedling-struc- 
ture, 27 , 799 ;.(*), 28 , 722. 
— Padus, insect visitors, 22 , 608. 
Pseudolarix, embryo (*), 25 , 644 ; female 
gametophyte (*), 25 , 641 ; male gameto- 
phyte (*), 25 , 640. 
— Kaempleri, seedling-structure, 23 , 212. 
Pseudotsuga Douglasii, archegonia (*), 23 , 
170 ; embryo (*), 23 , 1 75 ; female game- 
tophyte (*), 23 , 168 ; fertilization (*), 
23 , 172 ; male gametophyte. (*), 23 , 163. 
Psilotaceae, systematic position, 24 , 383. 
Psilotum flaccidum, morphology (*), 24 , 
374 ; structure (*), 24 , 375- 
— triquetrum, abnormal sporangia ■(*), 22, 
525. 
— and Sphenophyllum, comparison, 22 , 78. 
Pteridium aquilinum, histology of sieve- 
tubes (*), 26 , 573. 
Pteridophyta,medullation (*), 25 , 555, 1206; 
xylem elements (*), 25 , 745. 
Pteridosperm possessing Sphenopteris type 
of foliage (*), .22, 57. 
Pteris aquilina, wound reactions of petioles 
(*), 30 , 127. 
— droogmantiana, apogamy, 24 , 487. 
Pterocarya rhoifolia, seedling-structure (*), 
30 , 587. 
Pterospermum, n. gen., description (*), 28 , 
93 ) 104- 
— anglicum, n. sp., description (*), 28 , 104. 
Pterostylis, life-history (*), 23 , 265. 
Puccinia coronifera, 21 , 459 ; histology, 21 , 
460. 
— dispersa, 21, 454 ; haustoria (*), 21, 455 ; 
histology (*), 21, 454; hyphae, 21, 455; 
nuclei, 21, 455. 
— glumarum, haustoria (*), 21, 453 ; histo- 
logy, 21, 45° 5 nuclei (*), 21, 453 ; septa- 
tion of hyphae, 21, 452 ; spore-formation, 
21, 453 ; spore-germination (*), 21, 451. 
— graminis Tritici, 21 , 444 ; histology (*), 
21 , 4 + 5 - 
— malvacearum, effect of external stimuli 
on sporidia of .(*), 28 , 331. 
— Phlei-pratensis, germination of spore (*), 
21, 447; haustoria (*), 21, 448 ; nuclei 
(*), 21, 448 . 
— simplex, 21, 457; haustoria, 21, 459; 
histology (*), 21, 457 ; hyphae, 21, 458 ; 
nuclei, 21, 459. 
Puccinia Sorghi, description (*), 21 , 461. 
— triticina, 21, 456 ; histology (*), 21, 456. 
Pupalia purpurea, seedling-structure, 26 , 
182. 
Pyrola, spp., insect visitors, 22 , 616. 
Pyrus, spp., insect visitors, 22 , 621, 638; 
seedling-anatomy (*), 28 , 723. 
— floribunda, anatomy of leaf-fall, 25 , 74. 
Qi. 
Quercus, evolution of annual ring (*), 25 , 
984 ; of medullary ray (*), 25 , 992 ; tan- 
nin of heart-wood, 29 , 407. 
— spp., seedling-structure, 30 , 591. 
— palustris, anatomy of leaf-fall, 25 , 72. 
R. 
Rachiopteris cylindrica, description (*), 29 , 
532 ; discussion, 29 , 553 ; distribution and 
horizon, 29 , 532 ; organs in association 
with (*), 29 , 551. 
Radiospermum, n. gen., description (*), 28 , 
92, 1 o 1 . 
— elongatum, n. sp., description (*), 28 ,ioi. 
— grande, n. sp., description (*), 28 , 101. 
— inflatum, description (*), 28 , 101. 
— Kidstoni, description (*), 28 , 102. 
— marginatum, description (*), 28 , 102. 
— ornatum, n. sp., description (*), 28 , 102. 
. — ovatum, description (*), 28 , 87, 102. 
— perpusillum, description (*), 28 , 102. 
— problematicum, n. sp., description (*), 28 , 
103. 
— Sinclairi, description (*), 28 , 103. 
Ranales, seedling-anatomy (*), 28 , 695;, 
vascular system (*), 22, 651. 
Ranunculaceae, vascular anatomy (*), 22 , 
657 . 
Ranunculus, spp., insect visitors, 22 , 621; 
seedling-anatomy (*), 28 , 704. 
Raphanus Raphanistrum, insect visitors, 22 , 
604. 
Rayner, M. C. : Obligate Symbiosis in 
Calluna vulgaris (*), 29 , 97. 
Rays of dicotyledons, origin of multiseriate 
(*), 25 , 1005 ; relation of leaf-trace to 
formation of compound (*), 25 , 225. 
— of Quercus, evolution of medullary (*), 
25 , 992. 
Ray-tracheides in Cunninghamia sinensis 
(*), 22 , 593 - 
Reconstruction, methods of palaeobotanical 
(*), 27 , 273. 
Reduction divisions of Oenothera biennis 
(*), 24 , 631. 
Reed, H. S.: The Value of Certain Nutri- 
tive Elements to the Plant Cell (*), 21 , 
Soi- 
Reed, T. : On the Anatomy of some Tubers 
(*), 24 , 537- 
— Some Points in the Morphology and 
Physiology of Fasciated Seedlings (*), 26 , 
389- 
