INDEX AND GLOSSARY. 



Abaxial-surface, of the leaf, that 

 facing away from the stem in 

 development, 59, 61 (Figs. 44, 45). 



Abortion, where a part normally 

 present is not fully developed, 

 234 (Fig. 183) ; of a complete whorl 

 of floral-parts, 235 ; of ovules, 286 

 (Fig. 228) ; of loculi of Oak, 

 Coco-Nut, etc., 286 ; of floral-parts 

 in Lychnis, 509 (Fig. 413). 



Absciss-layer, the layer of cells along 

 which the leaf breaks away in 

 autumn, 68 (Fig. 52). 



Absorption of cell-wall, 28. 



Acacia, phyllodes of, 177. 



Acanthosicyos, deep-rooted, 176. 



Acetabularia, 396 (Fig. 335) ; iso- 

 gametes of, 461. 



Achene, a one-seeded nut, 286 ; of 

 Buttercup, 287 (Fig. 229). 



Achyla, on dead flies, 414. 



Aconitum, zygomorphy of, 240 (Fig. 

 189) ; pollination by Humble-Bee, 

 266 ; follicles of, 287 (Fig. 227), 

 289, 511 (Figs. 415, 417). 



Acorus (sweet-rush), root of, 73 (Fig. 

 55). 1 5& I dorsiventrality of, 174. 



Acquired characters, doctrine of non- 

 inheritance of, 472. 



Acrocarpic, applied to Mosses which 

 fruit at ends of stems, 359. 



Acropetal, applied to a succession of 

 appendages in which the latest 

 formed are nearest the apex of the 

 part that bears them : of leaves, 58, 

 222 ; of parts of flower, 230. 



Acroscopic, applied to that side of a 

 cell or part that faces towards the 

 apex, 125. 



Actinomorphic, or radial symmetry 

 of a shoot, where development is 



equal on all sides, 168 (Figs. 128, 

 129), 239 (Fig. 178). 



Adaptation, special modification 

 which arises in relation to the 

 environment, 160, 161, 186, 472. 



Adaxial surface, of the leaf, that 

 facing the stem in development, 

 59,61 (Figs. 44,45). 



Adhesion, the fusion of parts of dis- 

 tinct categories in the flower, 231. 



Adhesive-climbing, 183 (Fig. 137). 



Adiantum, embryo of, 346 (Figs. 288, 

 289, 290). 



Adonis, floral diagram of spiral 

 flower, 230 (Fig. 179). 



Adventitious, applied to buds formed 

 not in the normal sequence, pro- 

 pagation by, 218 (Fig. 167). 



Aecidium, 409 ; Aec. Berberidis, 

 Cluster-cups, 443 (Fig. 376). 



Aecidium-fruits, 448 (Fig. 383). 



Aecidium-spores, 448 (Fig. 383) ; of 

 Phragmidium, 448 (Fig. 384). 



Aerobic organisms, those which live 

 normally exposed to atmospheric 

 air, 115. 



Aerotropism, response to the stimulus 

 of unequal aeration, 128 ; positive 

 in roots of pot-bound plants, 128 ; 

 negative in pollen- tubes, 128 (Fig. 



89). 



Agrimonia, floral construction of, 233 

 (Fig. 182) ; hooked-fruits of, 192 

 (Fig. 238). 



Agrostemma (corn-cockle), conduct- 

 ing tissue of style, 257 ; pollen- 

 tubes of, 268 (Fig. 212) 



Alae, lateral petals of Pea-flowers, ^22 



(Fig. 43i). 

 Albugo, sexual organs of, 420 (Fig. 



357)- 



549 



