676 



STUDIES IN FOSSIL BOTANY 



Ophioglosstim, 289, 319, 344, 627, 628 



simplex, 641 

 Orthotropous, 390 



Osmunda,3$o, 368, 371,421,426, 505 

 Osmundaceae, 287, 291, 292, 315, 



332, 342, 344, 345, 350, 476, 



642, 646 

 Osmundites skidegatensis, 351 

 Otozamites, 556 

 Ovule, *540, 541, *542, 545, 548, 



579-584. S89 



P achy testa gigantea, 461 

 Palaeopteris. See Archaeopteris 

 Palaeostachya, 50, *6i-67, yj, 82 



bracts, 62, 64 



sporangia, 62, 64 



sporangiophores, 62, 64-67 



spores, 64 



gracilis, 62, 63, 76 



fedunculata, *62 



tvnz, 64, *65, *66, 620, 622 

 Palaeozoic plants, 5 

 Palissya, fructification, 610 

 Palm, 580 



wood, 660 

 Parichnos, *i30, 131, 149, 155, ''156, 

 x 57> I 79> * 2 °7. *209, 213, 214, 

 221, *222, 260, 261 

 Parkin, J., 538 

 Pecopterideae, affinities, 470 



seed-bearing, 465, 466-470, 471 

 Pecopteris, 272, 274, 277, 281, 282, 

 286, 288, 289, 303, 465, 468, 

 469, 470 



densifolia, 281 



dentata, *zjf. 



exigua, 287, 289, 422, 469 



oreopteridia, 281 



Pluckeneti, 288, 465, 470, 471- 

 472, 645 



Sterzeli, 468 

 Pedicel, 565, 570, 572, 573, 575 

 Peduncle, 571, 581, 582, 592 

 Penhallow, D. P., 351 

 Pericarp, 569, 570, 572, 573, 575, 



576 

 Periderm in Amyelon, *53i 



Bennettiteae, 565 



Bothrodendron, 201 



Calamites, 30, 31, 46 



Cordaiteae, 530, 531 



Heterangium tiliaeoides, 413 



Lepidodendron, 134, 139, *i44, 

 *M5. 149- J 5o 



Periderm in Lyginodendron, *359. 

 360, *365, *367, 382 



Medullosa, *43i, 435, 440, 441 



Poroxylon, 507, 510 



Sigillaria, *2i6, 217, 221, *227 



Sphenophyllum, 94 



Stiginaria, *243, 246, ""247 



Permian formation, 5, 19, 35, 83, 87, 



128, 296, 306, 441, 443, 446, 



476, 486, 487, 492, 564, 595, 



605, 607, 646, 652 



Permo-Carboniferous formation, 423, 



469, 501 

 Petrifaction, 7, 9, 11, 12, 451, 663 



analysis of, 11 

 Pettycur, 402. See Burntisland 

 Phanerogams, 356, 510 

 Phelloderm, 440 



Phylloglossum, 125, 193, 261, 635 

 Phyllotaxis, Botryopteris \ 327 



Calamopitys, 479, 480 



Heterangium, 408 



Lepidodend?'on, 128 



Lyginodendron, 362, 385 



Medullosa, 429, 430 



Megaloxylon, 474 



Poroxylon, 501-504 



Psaronius, 295 



Ptychoxylon, 489 



Zygopteris, 307 

 Phyllotkeca deliquescens, 72 

 Physostoma, 422 



elegans, 396, 460 

 Pinus, 524, 608 



Pits, bordered, significance, 642, 654 

 Pityeae, 514-518, 525, 651 



affinities, 518, 551, 554 

 Pitys, 514-517 



habit, 514 



stem, 514-517 



antiqua, 474, 514, 515, * 5 i6 



primaeva, 514 



Witkami, 514 

 Platyspermic, 451, 465, 466, 472, 



513. 547. 651 

 Pleuromeia, 637 

 Plumule, 574 

 Poacordaites, 521 



leaves, 521 

 Podocarpeae, 658 

 Podocarpus, 523, 609 

 Pollen-chamber, 464, 473 



Aetheotesta, 459 



Cordaianthus , 541-544, *542, 548, 

 549 



