Index to Vo/s. XI-XX. 
17 
the Genus Selaginella. Part III. The Leaf 
(Plate IX), xi. 123. 
Harvey-Gibson, R. J. — Id. Part IV. The 
Root (Plates XX and XXI), xvi. 449. 
Haustorium of Loranthus aphyllus, histology 
(*), xv. 753 ; morphology (*), xv. 749. 
Heat, effect of, on nuclear division, xix. 
529. 
— evolution of, by wounded plants, xi. 29. 
Hebeloma Jlavum , description, xviii. 497. 
— subochraceum, description, xviii. 475. 
Helianthus annuus, lignification of phloem, 
xvi. 180 ; xx. 319. 
— decapetalus, lignification of phloem, xx. 
319. 
— laetifolius, lignification of phloem, xx. 
319. 
— tuberosus, proteolytic enzymes, xvii. 614. 
Helicostylum piriforme, description (*), xvi. 
78 . 
Heliotropic stimulation, position of maxi- 
mum (*), xvii. 105. 
Helleborus, mechanism of stomata, xvi. 
340. 
Helminthostachys zeylanica, affinities, xiii. 
443 ; antheridia (*), xvi. 38 ; archegonia 
(*), xvi. 39 ; foliar bundles (*), xiii. 438 ; 
histology (*), xiii. 428 ; morphology (*), 
xiii. 421 ; nodal canals (*), xvi. 170; pro- 
thallus (*),xvi. 23; prothallus, morphology 
of (*), xvi. 32 ; prothallus, mycorhiza of 
(*), xvi. 36 ; prothallus-structure (*), xvi. 
34 ; root-structure (*), xiii. 440 ; spore- 
development (*), xx. 177; sporophyte, 
anatomy and morphology of young (*), 
xvi. 41 ; vascular skeleton (*), xiii. 426. 
Helotium, description, xi. 259, 285. 
— aciculare , systematic position, xi. 286. 
— atrovirens , description (*), xi. 287. 
— circinans, description (*), xi. 261. 
Helvetia , description, xi. 285. 
— feritoria , description (*), xi. 255. 
— Jlavo-virens , description (*), xi. 288. 
— gelatinosa , description (*), xi. 288. 
— laricina , description (*), xi. 272. 
— lutea, description (*), xi. 288. 
— platypoda , description, xi. 293. 
— revoluta , description (*), xi. 261. 
— spathularia , description (*), xi. 255. 
— spathulata , description (*), xi. 255. 
Hemiglossum, description, xi. 296. 
— Yunnanensis, description (*), xi. 296. 
Hemsley, W. B.— On the Julianiaceae, a 
new Natural Order of Plants, xx. 467. 
• — On the Genus Gorynocarpus, with De- 
scriptions of two new species (Plate 
XXXVI and two text - figures), xvii. 
743 . 
— Id. Supplementary Note, xviii. 179. 
— and Rose, J. N. — Diagnoses Specierum 
Generis Juliania, Americae tropicae, xvii. 
443 - 
Hepaticae, conducting-strands of (*), xv. 4. 
Heredity in connexion with Polypodium 
Schneideri, xi. 540. 
— possible function of the nucleolus in, xiii. 
269. 
Heterokontae, phylogenetic relations (*), 
xiv. 671. 
Heterophylly in Proserpinaca palustris (*), 
xviii. 579. 
Hevea brasiliensis, extra-floral nectaries (*), 
xviii. 217; exudation of latex, xiv. 205 ; 
laticiferous system of seed (*), xiv. 208 ; 
seedling, xviii. 220. 
Hibiscus vitifolius, intumescences of, xiii. 
622. 
Hill, A. W. — Notes on the Histology of the 
Sieve-tubes of certain Angiosperms, xvii. 
265. 
— The Histology of the Sieve-Tubes of 
Pinus (Plates XXXI-XXXIII), xv. 575. 
— - The Morphology and Seedling-structure 
of the Geophilous Species of Peperomia, 
together with some Views on the Origin 
of Monocotyledons (Plates XXIX and 
XXX and three text-figures), xx. 395. 
Hill, T. G. — On Secondary Thickening in 
Angiopteris evecta, xvi. 173. 
— On the Anatomy of the Stem of Dalbergia 
paniculata, xv. 183. 
— On the Presence of a Parichnos in Recent 
Plants, xviii. 654. 
— Id. (Plates XIX and XX) (t), xx. 267. 
— On the Roots of Bignonia (Plate XXII), 
xii. 323. 
— On the Seedling-structure of certain Cen- 
trospermae, xx. 473. 
— On the Seedling-structure of certain 
Piperales (Plate IX and three text-figures), 
xx. 161. 
— On Variation in the Flowers of certain 
Primulaceae (one text-figure), xvi. 317. 
— The Structure and Development of 
Triglochin maritimum (Plates VI and 
VII), xiv. 83. 
— and de Fraine, E. — On the Seedling- 
structure of Gymnosperms, xx. 471. 
— and Farmer, J. B.— On the Arrangement 
and Structure of the Vascular Strands in 
Angiopteris evecta, and some other Marat- 
tiaceae (Plates XVI-XV 1 II and one text- 
figure), xvi. 371. 
— and Freeman, Mrs. W. G. — The Root- 
structure of Dioscorea prehensilis (Plate 
XIX and one text-figure), xvii. 413. 
— and Scott, D. H. — The Structure of 
Isoetes Hystrix (Plates XXIII and 
XXIV and two text-figures), xiv. 413. 
Hirase, S., and Iiceno, S. — Spermatozoids 
in Gymnosperms, xi. 344. 
Holm, T. — Bartonia, an Anatomical Study 
(Plates XXXIII and XXXIV), xx. 441. 
— Obolaria virginica : A Morphological and 
Anatomical Study (Plate XIX and one 
woodcut), xi. 369. 
