6yS 



BOTANY OF THE LIVING PLANT 



Gemmae, of Mosses, 466 (Fig. 360). 



General purposes shoot, 347 ; segre- 

 gation of, 554. 



General receptacle of Compositae, 648, 

 652 (Fig. 502). 



Generative parthenogenesis, where an 

 embryo is formed without fertilisa- 

 tion, from a haploid egg, 587. 



Genes, the elements in the gametes 

 corresponding to the differentiating 

 characters of the zygote, 563, 572 ; 

 interaction of, 578 ; pleiotropic, 

 579. 586 ; loci of, 580 ; gene-muta- 

 tion, 585. 



Genetics, the experimental study of 

 inheritance and variation, 574-584 ; 

 and Evolution, 584-587. 



Genotype, an individual with a given 

 genetic constitution : also that 

 constitution itself, 575. 



Geotropism, response to stimulus of 

 gravity : positive and negative, 

 154 (Fig. 94) ; geotropic recovery, 

 158 (Fig. 96) ; lateral, 215 (Fig. 

 144). 



Geraniaceae, 628 (Fig. 478). 



Geraniales, 627. 



Geranium, sling fruit of, 324 (Fig. 

 243) ; flower of, 628 (Fig. 478). 



Germ, a young plant, or embryonic 

 individual, 254 ; of Wheat, 658 

 (Fig. 503) ; analysis of, 659. 



Germination, renewal of activity of 

 the dormant seed or spore, 5, 

 7, 139 ; conditions governing, 140. 



Geum, hooked-fruit of, 328 (Fig. 



251, D). 

 Gills, of Mushroom, 444. 

 Ginkgo, motile male gametes of, 527, 



55 1 - 

 Girder-principle, of disposition of 



tissue, 181 (Fig. 113), 183 (Fig. 



115), 187 (Figs. 120-122). 

 Gleditschia, leaf of, 349 (Fig. 261). 

 Gloeocapsa, 376 (Fig. 279). 

 Gloriosa, climbing leaf -tip, 216. 

 Gloxinia, propagation by adventitious 



buds, 252. 

 Glucose (Grape Sugar), 123. 

 Glumales, 613. 

 Glumes, 614, 616 (Fig. 464). 

 Gluten, 660. 

 Glycine soja (Soya Bean), analysis of, 



655 ; origin of, 656. 

 Glycogen, reserve carbohydrate of 



Fungi, 394. 

 Goat Willow (Salix), 619. 

 Gonidial layer, the stratum in a 



Lichen thallus where the green cells 



lie, 428 (Fig. 327). 



Gooseberry, 631 ; analysis of, 657. 



Gorse, seeds of, 140 ; transferred by 

 ants, 330. 



Graft-hybrid, the reputed result of 

 complete fusion of tissues of graft 

 and stock, so that the characters of 

 both are mingled, 251. 



Grafting, 249 (Figs. 173, 174). 



Gramineae, 616 (Fig. 464). 



Grape (Vitis vinifera), origin of, 656 ; 

 analysis of, 657. 



Grape-hyacinth (Muscari), 608. 



Grape sugar (Glucose), 123. 



Grasses, coleoptile of, 150 (Fig. 93) ; 

 haulm of, 185 (Fig. 119) ; leaf- 

 arrangement, 205 ; embryo of, 

 314 ; flower of, 616 (Fig. 464). 



Grass-leaves, curling under drought, 

 187, 211 (Figs. 120-122) ; water 

 exudation from, 109. 



Gravity, effect of, 8 ; stimulus of, 

 154 ; perception, theory of, 156 



(Fig. 95)- 



Green Algae, 361, Chap. xxii. 



Green peas, analysis of, 655. 



Grimmia, gemmae of, 466. 



Groundsel, 649. 



Ground-tissue, 40. 



Growing-point, the tip of the stem 

 or leaf or root, where now tissues 

 are being produced, 16 (Figs. 7, 8, 

 10) ; powers of, 604. 



Growth, increase in bulk with re- 

 distribution of organic material, 

 5, 7 : (Chap, ix.) 139-153 ; annual in- 

 crement of, 13 (Fig. 6) ; conditions 

 of, 31 ; effect of temperature upon, 

 147 (Fig. 90) ; effect of light upon, 

 146 ; localisation of, 85 (Fig. 62) ; 

 measurement of, 144 ; correlation 

 of, 149 ; zones of, 143 ; periodicity 

 of, 152 ; vegetative phase of, 141 ; 

 hormone promoting, 150 ; growth 

 and respiration, 135. 



Guard-cells, the cells that control the 

 pore of a stoma, 75 (Figs. 49, 50), 

 76 (Figs. 51, 52), 102 (Figs. 70, 

 71) ; water-stomata, 109 (Fig. 74, 

 A). 



Gummy walls, of mucilaginous 



character, 24. 

 Gussets, of mechanical tissue in 



leaves, 189 (Figs. 124, 125). 

 Gymnocladus, testa and endosperm 



of, 318 (Fig. 237). 

 Gymnosperms, seed-plants with their 

 ovules exposed, such as the Pines 

 and Firs, 3, 525 (Chap, xxxiii.). 

 Gymnosporangium, on Juniper, 



432. 



