INDEX AND GLOSSARY 



561 



Glumales, 492, 500. 



Glumes, 500, 503 (Fig. 406). 



Gluten, 547. 



Glycogen, reserve carbohydrate of 



Fungi, 405. 



Goat Willow (Salix), 505. 

 Gonidial layer, the stratum in a 



Lichen thallus where the green cells 



lie, 439 (Fig. 373). 

 Gooseberry, 517 ; analysis of, 544. 

 Gorse, seeds transferred by ants, 294. 

 Graft-hybrid, the reputed result of 



complete fusion of tissues of graft 



and stock, so that the characters of 



both are mingled, 218. 

 Grafting, 216 (Figs. 165, 166). 

 Gramineae._49_2 J jjO3 (Fig. 406). 

 Grape (Vitis vinifera), origin of, 543 ; 



analysis of, 544. 

 Grape-Hyacinth (Muscari), 495. 

 Grasses, sensitive cotyledon of, 125 ; 



haulm of, 150, 153 (Fig. 113) ; 



leaf -arrangement, 171 ; embryo of, 



278 ; flower of, 503 (Fig. 406). 

 Grass-leaves, curling under drought, 



133. 155 (Fig- "5)- 



Gravity, effect of, 8 ; stimulus of, 

 124 ; reception of stimulus by, 125. 



Green peas, analysis of, 542. 



Grimmia, gemmae of, 359. 



Groundsel, 535. 



Ground-tissue, 33, 35. 



Growing-point, the tip of the stem 

 or leaf or root, where new tissues 

 are being produced, 16 (Figs. 7, 

 8, 10). 



Growth, increase in bulk with re- 

 distribution of organic material, 

 5, 7 ; annual increment of, 13 

 (Fig. 6) ; (Chap. viii. p. 118) ; 

 conditions of, 119; rapidity of, 



121 ; effect of temperature upon, 



122 ; effect of light upon, 122 ; 

 of cell, 1 20 ; localisation of, 76 

 (Fig. 59). 



Guard-cells, the cells that control 



the pore of a stoma, 62 (Fig. 45) ; 



64 (Fig. 46) ; 65 (Figs. 47, 48). 

 Gummy walls, of mucilaginous 



character, 28. 

 Gussets, of mechanical tissue in 



leaves, 157 (Figs. 117, 118). 

 Gymnocladus, testa and endosperm 



of, 282 (Fig. 224). 

 Gymnosperms, seed-plants with their 



ovules exposed, such as the Pines 



and Firs, 3, 302 (Chap. xix). 



Gymnosporangium, 422. 

 Gynoecium, applied collectively to 

 all the carpels of a single flower, 



Hairs, appendages of the epidermis, 



12 ; effective in seed dispersal, 



289 (Figs. 232-236). 

 Hakea, stoma of, 66 (Fig. 50) ; 



sclerids in leaf of, 144 (Fig. 104) ; 



xerophytic leaf of, 1 77. 

 Halimeda, matted and cemented 



filaments of, 141, 395. 

 Haploid, having the simple number 



(x) of chromosomes in each nucleus, 



as in the gametophyte, 251 ; 



generation in Ferns, 348 ; in 



Ascomycetes, 435 ; in Puccinia, 



448. 

 Harveyella, parasitism of, 403 (Fig. 



339)- 

 Haustoria in ovules of Rhinanthus, 



280 (Fig. 222) ; of mildews, 431 



(Fig. 363). 



Hay-Bacillus, 458 (Fig. 391). 

 Hazel, as host for Tooth wort, 193 



(Fig. 144) ; Hazel nut, analysis 



of, 544- 



Heart-wood, 53. 



Heath (Erica), curled leaves of, 96; 

 endotrophic mycorhiza of, 197 ; 

 obligatory, 198 (Fig. 149) ; flowers 

 of, 525 (Fig. 433). 



Heather (Calluna), endotrophic my- 

 corhiza of, 198 (Fig. 149). 



Helianthus (Sunflower), root-cap of, 



126 (Fig. 87 bis.) ; development 

 of flower of, 238 (Fig. 188) ; double 

 fertilisation of, 270 (Fig. 214 tris). 



Heliotropism, response to stimulus of 

 light, 127 ; positive and negative, 



127 (Fig. 88) ; transverse, 127. 

 Helleboreae, follicles of, 285 (Fig. 



227). 

 Helleborus, floral diagram of, 230 



(Fig. 180) ; 511. 

 Hemerocallis, 495. 

 Hemicyclic, arrangement of parts 



of flower, 230 (Fig. 180). 

 Hemp, fibres of, 145. 

 Hems, of sclerotic tissue at leaf 



margins, 157 (Fig. 118). 

 Hepaticae (Liverworts), 3 ; 353 ; 



3 6 5-37 J sexual organs of, 366. 

 Heracleum (Cow Parsnip), 534 (Fig 



432). 



