Index to Vo Is. XI -XX. 
21 
Lagenostoma Lomaxi, structure of the 
Palaeozoic seed, with a statement of the 
evidence upon which it is referred to 
Lyginodendron (t), xviii. 321. 
• the seed of Lyginodendron (t), xvii. 
625. 
— Sinclairi, description (f), xix. 327. 
— some species of: A Type of Pterido- 
spermous Seed from the Coal Measures (+), 
xix. 326. 
■ — structure (* +), xvii. 459. 
Lang, W. H. — Alternation of Generations 
in the Archegoniatae, xii. 583. 
— On Apogamy and the Development of 
Sporangia upon Fern Prothallia, xii. 251. 
■ — On Apospory in Anthoceros laevis (Plate 
XXVII), XV. 503. 
• — On a Prothallus provisionally referred to 
Psilotum (Plate XXXVII), xviii. 571. 
■ — On the Morphology of Cyathodium 
(Plates XXI and XXII), xix. 41 1. 
— On the Prothalli of Ophioglossum pen- 
dulum and Helminthostachys zeylanica 
(Plates I— I II), xvi. 23. 
— Preliminary Statement on the Develop- 
ment of Sporangia upon Fern Prothalli, 
xi. 157. 
— Studies in the Development and Mor- 
phology of the Cycadean Sporangia, I. The 
Microsporangia of Stangeria paradoxa 
(Plate XXII), xi. 421. 
— Id. II. The Ovule of Stangeria paradoxa 
(Plates XVII and XVIII), xiv. 281. 
— The Prothallus of Lycopodium clavatum 
(Plates XVI and XVII), xiii. 279. 
Larix, seedling-structure, xx. 472. 
- — spindle-formation in pollen-mother-cells : 
felt, formation of (*), xvii. 292 ; pre-radial 
stages (*), xvii. 289 ; radial stages (*), 
xvii. 291 ; spindle (*), xvii. 295. 
Lastraea dilatata, var. cristata gracilis, de- 
velopment of sporangia on prothallus, xi. 
158. 
Latex, carbohydrates of, xiv. 200 ; coagula- 
tion, xii. 165 ; xiv. 195 ; exudation of from 
severed petioles of Hevea brasiliensis and 
Plumiera acutifolia, xiv. 205 ; function, xi. 
334; xiii. 620; xiv. 194 ; oxydases, xiv. 199; 
properties, difference of, between latex of 
old and young organs, xiv. 203 ; proteids, 
xiv. 195 ; wounding, effect of previous on 
flow, xiv. 204. 
Laticiferous plants, proteolytic enzymes in, 
xvii. 246. 
— system of seed of Hevea brasiliensis (*), 
xiv. 208. 
— tissue, origin and function of, xiv. 210. 
Lathraea Squamaria, function and structure 
of leaves (*), xi. 385 ; xii. 118. 
Lawson, A. A. — The Gametophytes, Ar- 
chegonia, Fertilization, and Embryo 
of Sequoia sempervirens (Plates I-IV), 
xviii. 1. 
Lawson, A. A.— The Gametophytes, Fer- 
tilization, and Embryo of Cryptomeria 
japonica (Plates XXVII-XXX), xviii. 417. 
Leaf and sporocarp in Marsilia quadrifolia, 
development (*), xii. 119. 
— of Anemia hirsuta, an anomalous, xv. 765. 
Leaf-traces in Araucarieae, persistence, xv. 
423, 547 . 
Leake, H. M. — The Localization of the 
Indigo-producing Substance in Indigo- 
yielding Plants (Plate XIII), xix. 297. 
Leaves, digestion by, xix. 157 ; Asparagus 
officinalis, xix. 160 ; Cucurbita Pepo var. 
ovifera, xix. 160 ; Ficus Carica, xix. 159; 
Phytolacca decandra, xix. 159 ; Rheum 
officinale and undulatum, xix. 158. 
— influence of correlation upon size of (*), 
xx. 79 ; reaction of to traumatic stimula- 
tion (*), xv. 533. 
Lentinus lepideus, reaction of fruit-bodies 
of to external stimuli (*), xix. 427. 
Leotia, description (*), xi. 259, 285. 
— acicularis, systematic position, xi. 286. 
— aquatica, description (*), xi. 292. 
— atrovirens, description (*), xi. 286. 
— Bulliardi, description (*), xi. 272. 
— chlorocephala, description, xi. 290. 
f. Stevensoni, description, xi. 289. 
— circinans , description (*), xi. 261. 
— clavus, description (*), xi. 260. 
— Dicksoni, description (*), xi. 272. 
— elegans, description, xi. 274. 
— elegantula, description, xi. 294. 
— exigua, description, xi. 285. 
— fructigena, description, xi. 294. 
— gelatinosa capitulo subviridi, description 
(*), xi. 288. 
— geoglossoides, description (*), xi. 269. 
— gracilis, description (*), xi. 261. 
— laricina, description (*), xi. 272. 
— lubrica, description (*), xi. 287. 
f. chlorocephala, description, xi. 290. 
— f . Stevensoni, description, xi. 289. 
f. stipitata, description (*), xi. 290. 
var . vis cos a, description (*), xi. 290. 
— Ludnvigii , description (*), xi. 272. 
— marcida, description (*), xi. 291. 
— mitrula , description (*), xi. 276. 
var. pusilla, description (*), xi. 277. 
— ochroleuca, description (*), xi. 262. 
— platypoda, description (*), xi. 293. 
— pusilla , description (*), xi. 277. 
— rufa, description, xi. 294. 
— stagnalis, description, xi. 293. 
— Stevensoni , description, xi. 289. 
— truncorum, description (*), xi. 260. 
— uliginosa, description (*), xi. 272. 
— verpoides, description, xi. 294. 
— viridis, description (*), xi. 269. 
Lepidocarpon, n. gen., description (f), xiv. 
717 ; morphology, xiv. 714. 
Lepidodendron aculeatum, anatomy and 
morphology (* +), xx. 371, 374. 
