542 



MOSSES AND FERNS 



314, 315 ; sporangium, 332 ; stem, 

 318, 321; stomata, 326; vascular 

 bundles, 320, 323, 326, 330 



Polystichum angulare var. pulcherrimum, 

 apospory of, 306 



Polytrichum, 154, 156, 218 ; leaf, 212 ; 

 stem, 212; sporogonium, 214 

 commune, 209. Figs. 106, 107 

 formosum, 209 

 juniperinum, 213 



Polytrichacefe, 155, 157, 209, 210, 212 ; 

 male flower, 214 



Porella, 96, 99, 100, 102, 103, 107, 

 108, 168 ; amphigastria, anther- 

 idium, 98, 99, 100 ; apical growth, 



97 ; archegonium, 102 ; branches, 



98 ; embryo, 103 ; leaves, 96 ; 

 spermatozoids, 100 ; sporogonium, 

 104 ; spores and elaters, 104 



Bolanderi, 96. Figs. 41, 42, 44, 45, 



46, 47, 48, 49 

 platyphylla, 96 

 Preissia, 14, 59, 68 ; sclerenchyma, 14, 



44 

 commutata, 44; archegonium, 52 



Protocephalozia, 73 

 ephemeroides, 109 



Psilophyton, 506 



Psilotites, 506 



Psilotum, 463, 480, 482, 484 ; gemmae, 

 480 ; sporangium, 484 ; sporophyte, 

 480 

 triquetrum, 480. Figs. 250, 251 



Psilotaceas, 463, 480, 504, 506, 515, 

 519; affinities, 504; fossil P., 506; 

 sporophyte, 480 ; sporangium, 483 



Pteridophytes, 3, 4, 6, 218, 297, 298, 

 299. 300> 422, 460, 467, 474, 479, 

 485, 5o5> 506, 511, 512, 513, 

 514, 516, 517, 518, 519; embryo, 

 3; heterospory, 7, 516; pro- 

 thallium, 4, 7 ; sexual organs, 

 219; sporangium, 4, 220; sporo- 

 phyte, 3, 4 ; vascular bundles, 4 



Pteris aquilina, 302, 306, 376 ; apo- 

 spory, 306. Fig. 163 

 Cretica, 305, 329 



Ptilidioideae, 113 



Radula, 104, 107, 174; germination, 

 108 



complanata. Figs. 50, 51 

 Reboulia, 42 ; carpocephalum, 55 



hemisphrerica. Fig. 18 

 Rhizocarpese (see Hydropterides) 

 Rhyncostegium murale, 152 

 Riccardia (see Aneura) 

 Riccia, 12, 14, 15, 16, 22, 40, 41, 46, 



47, 4S, 50, 52, 67, 69, 75, 79, 80, 

 117, 149, 508, 509, 511; adven- 

 tive buds, 28 ; air chambers, 27 ; 

 antheridium, 32 ; archegonium, 29, 

 30 ; archesporium, 35 ; branching, 

 28; calyptra, 37; embryo, 34; 

 epidermis, 27 ; growth of thallus, 

 25 ; root hairs, 28 ; spermatozoids, 

 33 ; spore division, 35, 36 ; sporo- 

 gonium, 18 ; tissues, 29 ; ventral 

 lamellse, 27 

 R. Bischoffii, 27, 30, 31 

 crystallina, 28 

 fluitans, 25, 28, 40 

 glauca, 25, 27, 29, 32, 37. Figs. 



_ I, 2, 3, 4, 5, 6 

 hirta, 24, 29, 30, 65 ; development of 

 spores, 36 ; germination, 37. Figs. 

 4, 5, 6, 7, 8, 9 

 natans (see Ricciocarpus) 

 Ricciacese, 18, 19, 22, 25, 42, 68, 74; 

 classification, 40; diagnosis, 21; 

 sexual organs, 29 

 Ricciocarpus, 8, 40, 43, 48, 68 ; struc- 

 ture of thallus, 40 

 natans, 40 ; ventral scales, 27 

 Riella, 8, 12, 14, 71, 72, 80, 82, 95 

 helicophylla, 81. Fig. 32 

 Pai'isii, 81 

 Riellese, 72 



Salvinia, 331, 378, 380, 382, 384, 

 385, 386, 388, 390, 392, 393, 394, 



395, 396, 398, 419, 420, 421 

 natans, antheridium, 380 ; arche- 

 gonium, 386 ; branching of sporo- 

 phyte, 394 ; embryo, 388 ; leaves, 

 393; microspore, 380; prothallium, 

 380, 385 ; spermatozoids, 380 ; 

 sporangia, 394, 398 ; sporocarp, 

 379, 398; sporophyte, 390; stem 

 apex, 390 ; vascular bundles, 394. 

 Figs. 196, 203 



Salviniacese, 221, 304, 307, 378, 380, 

 420, 421, 516, 517 



Scapanioidese, 113 



Schistostega, 208 



SchizEea, 371, 372 

 pusilla, 370 



Schizseacese, 307, 308, 370, 420 ; game- 

 tophyte, 370 ; leaf, 371 ; root, 372 ; 

 sexual organs, 371 ; sporangium, 

 372; stem, 371 ; trichomes, 371 ; 

 vascular bundles, 371 



Scolopendrium, 376 



Selaginella, 7, 115, 300, 461, 463, 485, 

 486, 487, 491, 495, 500, 503, 505, 



