INDEX 



431 



243 ; 

 178 



269, 277. 



; leaf of, 



Fungi, 232, 233 (fig.) 

 parasitic Angiosperm: 



(fig.). 179. 

 Hawkweed (Hieracinm), 372. 

 Hawthorn (CratcEgus). 137, 370. 

 Hay, fermentation of, 261. 

 Hazel (Corylus), 354 ; pollen tube 



of. 364. 365. 

 Heart-wood, 125, 126. 

 Heat, and enzyme-action, 56 ; and 



protoplasmic movement, 4 ; 



evolution of, in fermentation, 



261, 265. 

 Heat-rays, protection against, 64, 



95, 102, 138. 

 Heath-plants. 178, 257, 

 Heather {Calluna), 72 



162, 163 (fig,). 

 Heather-family (Ericaceje), 178, 



361, 363.' 



Hedera helix, 10 ; secretory canals 

 of, 152 (fig.). 



Helianthemiim vulgare, 379 (fig.). 



Helianthits, 49, 113 ; stem-struc- 

 ture of, 76-80 (figs.), 87. 



Helleboriis fcetidus, cuticle of, 91. 



Hemibasidii, 407. 



Hemlock [Coniitm maculatum), 61. 



Hemp {Cannabis saiiva), 34, 265. 



Henbane [Hyoscvamus niger). 61. 



Hepatics, 180, 193, 269-73 (figs.), 

 277, 278, 355, 407 ; antheridia 

 of, 277, 278 (fig.), 279 ; arche- 

 gonia of, 280, 281 (fig.) ; 

 embryo of, 282 ; fertilisation 

 in, 280, 281 ; .gemmae of, 270 

 (fig.), 273 (fig.), 277 ; growing 

 point of, 270 , 272 ; habitat of, 

 269, 272 ; sporogonia of, 271 

 (fig.), 282-4 (fig.) ; thallus of, 

 269-73 (figs.). 278 (fi.g.). 



Herbaceous plants, stabilitv of, 9, 



87. 

 Heredity, 374-91 ; nucleus and, 389. 

 Hermaphrodite flowers, 354. 

 Heterocj-sts (of Blue-green .A.lga;), 



206 (fig,). 

 Heterospory, 321, 332. 

 Heterozygo'te, 385. 

 Hevea brasiliensis, 156 (fig.), 157. 

 Hickory (Carya), 130. 

 High power (of microscope), 400. 

 Hilum (of starch-grains), 41, 42 



(fig.). 43. 

 Hinge-cells (of Grasses), 163, 164 



(fig.). 

 Hippopha rhamnoides, hairs of, 103 



(fig.). 



Hippuris, growing point of, 19 

 (fig.); leaf of, 177: stem- 

 structure of, 172, 173 (fig.). 



Hogweed (Heracleum). 31 ; nectary 

 of, 148. 



Hokiis mollis, 112. 



Holdfasts. See Attachnig organs. 



Hollow stems, 80, 81 (fig.), 126. 



Holly (Ilex aquifoliuin), 127 ; leaf- 

 structure of, 92 (fig.), 95, III, 

 113, 160 (fig,). 



Hollyhock {Altlicea), epidermis of, 

 9.5 ; pollen of, 362 (fig,) ; rust 

 of {Piiecinia malvacearum), 

 248. 253. 



Homospory, 321. 



Plomozygote, 386. 



Honey, 46, 148. 



Hop (Humiilus lupiilus), 63, 257 ; 

 fibres of, 34 (fig.) ; hairs of, 

 102 (fig.), 104, 105 ; Mildew of 

 (Sphaerotheca castagnei). 244 



(fig.). 

 Honmdiiim, 208, 213 (fig.), 216. 

 Hornbeam (Carpinits betulus,) 128, 



367. 



Hornwort (Ceratophylhim), ana- 

 tomy of, 170, 171 (fig.) ; pollen 

 of, 361. 



Horse Chestnut {.Esciilus hippo- 

 castanum), 52, 59 (fig.) ; hairs 

 of, 102 ; stem-structure of, 

 120, 121 (fig.), 123 (fig.), 127. 



Horse Radish (Coc/i/facja armoracia), 

 48. 



Horsetail (Equisetum), 39, 180, 

 289, 310-13 (figs.), 321, 407; 

 growing point of, 18 (fig.). 



Host, 179, 230, 232, 245, 247, 248, 

 252, 253, 264. 



Hot-beds, 261. 



Hot-springs, organisms of, 204, 

 261. 



House-leek (Sempervivitm tectorum), 

 98. III. 



Humidity, influence of, on plant- 

 structure, 168, 170. 



Humiilus lupuliis, 63, 257 ; fibres 

 of, 34 (fig.) ; hairs of, 102 (fig.), 

 104, 105 ; Mildew of (Sphaero- 

 theca casiagnei], 244 (fig.). 



Humus, 239, 248, 252, 266 ; and 

 mycorrhiza, 72, 2^2, 316. 



Hyacinth [Sell la), 44, 365 ; grow- 

 ing point of root of, 20 (fig.). 



Hybrid endosperm, 386. 



Hybrids, 253, 382-9 ; graft — , 

 389 ; intermediate between 



