INDEX AND GLOSSARY 



Apogamous nuclear-pairing in Phrag- 

 midium, 448 (Fig. 384). 



Apogamy, where a sporophyte springs 

 directly from a gametophyte with- 

 out syngamy, 349 (Figs. 293, 294) ; 

 see also Apomixis, 477. 



Apomixis (or Apogamy), loss of 

 sexuality, 477. 



Apophysis, basal part of capsule in 

 Mosses, 362 (Fig. 305). 



Apospory, transition directly from 

 sporophyte to gametophyte with- 

 out intervention of spores, in Ferns, 

 349 (Fig. 292). 



Apple, 518, 520 (Fig. 4260) ; analysis 

 of, 544 ; cork of, 54 ; deciduous 

 leaves of, 162 ; flower of, 254 

 (Fig. 202) ; stigma of, 255. 



Apposition, of layers in growth of 

 cell-wall, 28. 



Apricot, analysis of, 544. 



Aqueous cells, in folding leaves of 

 Grasses, 155 (Fig. 115). 



Arachis hypogaea (Pea-nut; Monkey- 

 nut), geotropic curvature of fruit, 

 297 ; analysis of, 542 ; origin of, 



543- 



Araucaria, 303. 

 Archegoniatae, 484. 

 Archegonium, of Pine, 310 (Fig. 253), 



254; of Pteridophytes, 316; of 



Selaginella, 321 (Fig. 265) ; of 



Ferns, 344 (Fig. 285) ; of Mosses, 



259, 261 (Fig. 304). 

 Archesporium, the cell or group of 



cells from which the spores of a 



sporangium or sporogonium origi- 

 nate, of Moss, 364. 

 Arctic flora, chiefly perennial, 163. 

 Arctic plants, xerophytic features of, 



178. 

 Arillus, an extra integument formed 



after fertilisation, 283 (Fig. 225). 

 Arisarum, 403. 

 Armillaria mellea, parasitism of, 293, 



404 (Fig. 340), 407, 452. 

 Aroids, prehensile roots of, 184. 

 Ascogenous hyphae, in fruit of Asco- 



mycetes, 434 (Fig. 367), 435. 

 Asco-lichenes, 438. 

 Ascomycetes, fungi which produce 



Asci, 411, 412, 429 ; alternation in, 



481. 



Ascophyllum, 385, 403. 

 Ascospores, spores produced in Asci, 



411 (Fig. 346) ; of Penicillium, 434 



(Fig. 367). 



Ascus, the characteristic spore-bear- 

 ing body of the Ascomycetes, 411 

 (Fig. 346) ; development of, 430. 



Asparagus, 495. 



Aspen, lamina of, 61 (Fig. 43) ; 

 petiole of, 154. 



Aspergillus, 429, 433 (Fig. 366). 



Aspidistra, 494. 



Asplenium, sporophytic budding in, 

 336. 



Astilbe, 516. 



Astrantia, mechanical construction 

 of stem, 144 (Fig. 103) ; 151 (Fig. 

 109) ; simple umbel of, 226 (Fig. 



175); 525- 

 Athyrium Filix-Foemina, v. claris- 



sima, chromosomes of, 348 ; apo- 



spory in, 349 (Fig. 292), 350 ; 



parthenogenesis in, 478, 482. 

 Atropa Belladonna (Nightshade)', 528. 

 Aulacomnion, gemmae of, 359 (Fig. 



301)- 



Autonomic movements, arising from 

 inner impulses, 124. 



Autophyte, a plant which is com- 

 pletely self-nourished, 187. 



Autotrophic nutrition, complete self- 

 nutrition, 187. 



Auxanometer, an instrument for 

 amplifying and measuring growth, 

 121. 



Auxospores of Diatoms, 401. 



Avena sativa (Oat), analysis of, 547 ; 

 origin of, 548. 



Axillary Buds, buds arising in the 

 angle between stem and leaf, 9, 69 

 (Fig. 52). 



Azygospore, a body resembling a 

 zygospore. but produced without 

 syngamy : in Mucor, 426. 



Bacillus, rod-shape of Bacteria, 458 ; 

 B. subtilis (Hay Bacillus). 458 

 (Fig. 391) ; B. radicicola, in root- 

 tubercles, 106 (Fig. 156), 205. 



Bacteria, 458 ; aerobic and anaerobic, 

 460 ; parasitic and saprophytic, 

 459 ; nutrition of, 460 ; cilia of, 

 458 ; rapid multiplication of, 459 ; 

 effect of light on, 459. 



Bacterioids, turgid forms of Bacillus 

 radicicola found in root-tubercles, 

 205, 206 (Fig. 156). 



Bamboo, mechanical construction of 

 stem of, 151 (Fig. 107). 



Banana, marginal tearing of leaf, 157. 



