INDEX 



43i 



Fungi, 232, 233 (fig.), 243 ; 



parasitic Angiosperms, 178 



(fig.), 179. 



Hawkweed (Hieracium), 372. 

 Hawthorn (Cratezgus), 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, 269, 277. 

 Heather (Callund), 72 ; leaf of, 



162, 163 (fig.). 

 Heather-family (Ericaceae), 178, 



361, 363- 



Hedera helix, 10 ; secretory canals 

 of, 152 (fig.). 



Helianthemum vulgar e, 379 (fig.). 



Helianthus, 49, 113; stem-struc- 

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



Helleborus fceiidus, cuticle of, 91. 



Hemibasidii, 407. 



Hemlock (Conium maculatum), 61. 



Hemp (Cannabis saliva), 34, 265. 



Henbane (Hyoscyamus niger), 61. 



Hepaticae, 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 (fig.). 



Herbaceous plants, stability of, 9, 



87- 



Heredity, 374-91 ; nucleus and, 389. 

 Hermaphrodite flowers, 354. 

 Heterocysts (of Blue-green Algae), 



206 (fig.). 



Heterospory, 321, 332. 

 Heterozygote, 385. 

 Hevea brasiliensis, 156 (fig.), 157. 

 Hickory (Gary a), 130. 

 High power (of microscope), 400. 

 Hilum (of starch-grains), 41, 42 



(fig.), 43- 

 Hinge-cells (of Grasses), 163, 164 



(fig.)- 

 HippophfB 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. 



Holcus mollis, 112. 



Holdfasts. See Attaching organs. 



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



Holly (Ilex aquifolium), 127 ; leaf- 

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

 113, 160 (fig.). 



Hollyhock (Althata), epidermis of, 

 95 ; pollen of, 362 (fig.) ; rust 

 of (Puccinia malvacearum) , 

 248, 253. 



Homospory, 321. 



Homozygote, 386. 



Honey, 46, 148. 



Hop (Humulus lupulus), 63, 257 ; 

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

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

 (Sphaerotheca castagnei), 244 



(fig-)- 



Hormidium, 208, 215 (fig.), 216. 

 Hornbeam (Carpinus betulus,) 128, 



367. 



Horn wort (C er atop hy Hum), ana- 

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

 of, 361. 



Horse Chestnut (JEsculus hippo- 

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

 of, 1 02 ; stem-structure of, 

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



Horse Radish (Cochlearia armor acia], 

 48. 



Horsetail (Equisetum), 39, 180, 

 289, 310-13 (figs.), 321, 47 ; 

 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 (Sempervivum tectorum), 

 98, in. 



Humidity, influence of, on plant- 

 structure, 1 68, 170. 



Humulus lupulus, 63, 257 ; fibres 

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

 104, 105 ; Mildew of (Sphaero- 

 theca castagnei), 244 (fig.). 



Humus, 239, 248, 252, 266; and 

 mycorrhiza, 72, 252, 316. 



Hyacinth (Scilld), 44, 365 ; grow- 

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



Hybrid endosperm, 386. 



Hybrids, 253, 382-9 ; graft , 

 , 389 ; intermediate between 



