922 INDEX 
filmy structure, 582; stock, 584 (Fig. 
328) ; dlatatum (Fig. 68). 
Hypobasal appendage of Jungermanniaceae, 
analogy with suspensor, 661. 
Hypobasal tier, 666. 
Hypoderris, 617. 
Hypolepis, 615, 616; phyletic position of, 655 
(Fig. 354). 
. Hypothetical archegoniate algae of Tansley, 
137, 216. 
Imperfectly developed parts, 162. 
Indusium, 636 ; reduction of, 637. 
Initiation of sporophyte not demonstrated in 
any one phylum, 658. 
Intercalation of sporophyte, 260. 
Interpolation of sporangia, 612. 
Irregularities of chromosome-cycle, 58. 
Isoetes, 95 (Figs. 52, 53), 307 (Fig. 155) 
sporangia of, 318 (Figs. 165, 166); ana- 
tomy of, 337 (Fig. 177); embryology of, 
358 (Fig. 191) ; sporophytic budding, 57 ; 
stele of, 337; secondary thickening of, 
338 ; echtnospora, 319; hystrix, 337 
(Fig. 177). 
Jungermanniales, 264. 
Juniperus communts, 127 (Fig. 69). 
Kaulfussia, 151, 505 (Fig. 276); sorus of, 
512 (Figs. 278, 281, 283); anatomy of, 
525. 
Klukia, 546 (Fig. 304). 
Laccopleris, 565, 622. 
Lastraea pseudo-mas, v. cristata, 60. 
Leaf, ‘‘ free-living,” 183; its vascular supply, 
192; wings of in ferns, 651 (Fig. 353). 
Leaf-formation, in Liverworts, 133; in 
vascular plants, 134. 
Leaf-trace, 193; of Ophioglossaceae, 462, 
488 ; in ferns, 648. 
Leaves, sterile and fertile, 87; polyphyletic 
origin of, 133. 
Lepidocarpon, 704. 
Lepidodendron fuliginosum, 338; Har- 
courti?, 334 (Fig. 174); rhodumnense, 
334; saalfeldense, 334; petticurensis, 
3343 selaginoiaes, 336 (Fig. 176). 
Lepidophloios, 304 (Fig. 152). 
Lepidostrobus, 305 (Fig. 153); Brownz, 95, 
322; anatomy of, 335. 
Lepidostrobus Veltheimianus, 324 (Fig. 170). 
Leptopterts, 530. 
Leptosporangiate Ferns, symmetry of, 213 ; 
not primitive, 496. 
Leucostegia, 615 (Fig. 340). 
Ligulatae, 291, 299; embryology of, 356; 
“* Selago”’ condition, 700 ; truly primitive, 
711. 
Lily, pollen-mother-cells of, 49 (Fig. 32). 
Lindsaya, 617; phyletic position of, 665 
(Fig. 354). 
Lomatophlotos macrolepidotus, 305. 
Loranthus, 126. 
Loxsoma, systematic position of, §74; phyletic 
position of, 655 (Fig. 354). 
Loxsoma Cunninghanit, 105 (Fig. 60). 
Loxsomaceae, 571; spore-producing mem- 
bers, 571; anatomy, 573. 
Loxsomopsis, see addendum, p. xii. 
Lycopodiales, progressive disintegration of 
stele, 231; general morphology of, 290; 
spore-pruducing members of, 311; com- 
parative anatomy of, 328; embryology 
of, 340; summary on, 363. 
Lycopodites Stochiz, 298 (Fig. 147, 321); 
whorled leaves, 230; Guztbieri, 301 3 
primaevus, 301 ; Suzssez, 301 ; celéatus, 305 ; 
Retdtz, 305. 
Lycopodium, origin of sporangium, 146 (Fig. 
75); leaf arrangement of, 291 (Fig. 141) ; 
section Uvostachya, 294, 3133 section 
Khopalostachya, 294, 314; subgenus 
Lepidotis, 296; subgenus Diphasium, 296; 
Selago, 292; Subselago, 292; alpinum, 
sporangia, 314 (Fig. 161); azzotinum, 
anatomy of, 329 (Fig. 171); prothallus 
of, 341 (Fig. 179); embryo of, 347 (Fig. 
186); cernuum, 296 (Fig. 143); pro- 
thallus of, 341 (Fig. 178) ; embryology of, 
351 (Fig. 187), 188, 101; gametophyte 
of, 37 (Fig. 21); sporophyte of, 38 (Fig. 
22); detached leaf-traces, 199 (Fig. 101); 
chamaecyparissus, 125 (Fig. 67); clavatum, 
296; sporangium of, 314; prothallus of, 
343; embryo of, 347; reduced sgales of 
seedling, 239 (Fig. 117); compactum, 292; 
Trencilla, 292; firmum, 292; rigidum, 
292; Dalhousiacanum, 292; carinatum, 
2923 guidioides, 292; syuwamosum, 292; 
Phlegmaria, 293; (Fig. 142); varium, 
294; subulatum, 294; nummularifolium, 
204; ophioglossoides, 294; pintfolium, 
2943 tnundatum,294; Drummondit, 294 ; 
cernuum, 295 (Fig. 148); clavatum, 296 ; 
