700 



INDEX 



Podomitrium, 6i6, 617, 618 

 Malaccense, 616, 617, 618 

 Pollen-spores, 4, 581, 603 

 PoUen-tube, 604 

 Polyembryony, 492 

 Polypodiaceae, 305, 306, 310, 311, 



312, 314, 331. 339. 349. 357. 

 362, 367, 392, 439, 440, 570, 

 584, 603 

 embryo, 321 

 sporangia, 395 

 stem, 328 



stem-apex and structure, 329 

 structure of primary stele, 327 

 vascular bundles of stem, 330 

 Polypodium, 339, 341, 394, 440 

 development of sporangiimi, 340 

 falcatum, 336, 344; Figs. 182, 



189, 190, 191, 231 

 lingua, 335 

 Polystelic stem, 526 

 Polystichum angulare var. pul- 



cherrimum, 309 

 Polytrichaceae, 162, 163, 165, 218, 

 220, 221 

 male inflorescence, 224 

 Peristome, 225 

 shoot, 222 

 stem, 222 

 Polytrichales, 622, 623 

 Polytrichum, 162, 164, 199, 203, 

 222, 229, 565, 578, S9S 

 caljfptra, 225 

 leaves, 221 

 sporogonimn, 224 

 stem, 221 

 commune, 218, 221; Figs. 119, 



121 

 formosum, 218 

 juniperinum, 223, 622 

 Populus, 574 



PoreUa, 113, 115, 176, 619 

 amphigastria, 102 

 antheridium, 105, 106 

 apical growth, 102, 103 



Porella — Cont. 



archegonia, 107, 108 

 branching, loi 

 embryo, 109 

 perianth, 109 

 sex-organs, 104 

 spermatozoids, 107, 619 

 spores, III 

 sporophyte, no 

 Bolanderi, loi ; Figs. 49, 50, 52, 



S3. 54. 55. 56. 57 

 platjTjhyUa, loi 

 PoreUacese, 620 

 Pores, 40, 48 



Fimbriaria Calif omica; Fig. 11 



Kaulfussia, 299 



Marchantiaceae, 42, 59 

 Preissia, 14, 44, 58, 59, 61, 70 



sclerenchyma, 44 

 commutata, 44, 54 

 Primary root, 326, 492 



AzoUa, 406 



Botrychium, 243 



Marattia, 284 



Onoclea, 325 



Osmxmda, 359 

 Primary tubercle, 236, 486 

 Prismatic layer, 554 

 Prosenchyma, 173 



ProthaUium, see also Gameto- 

 phyte, 4, s, 6 



Alsophila, 391 



ameristic, 314 



apical growth, 314, 318 



branching, 277, 374 



dichotomy, 452 



dioecism, 453 



secondary, 534 

 Protocalamariaceae, 586, 588 

 Protocephalozia, 74 

 ephemeroides, 116 

 Protocorm, 491, 492, 503, 599 

 Protonema, 2, 3, 8, 12, 13, 20, 37, 

 74, 114. IIS. 116. 161, 162, 

 163, 168, 182, 183, 188, 189, 



