INDEX AND GLOSSARY 



Abaxial-surface, of the leaf, that 

 facing away from the stem in 

 development, 70, 72 (Figs. 47, 48). 



Abortion, where a part normally pre- 

 sent is not fully developed, 269 

 (Fig. 193) ; of a complete whorl of 

 floral-parts, 269 ; of ovules, 322 

 (Fig. 241) ; of loculi of Oak, 

 Coconut, etc., 322 ; of floral-parts 

 in Lychnis, 621 (Fig. 470). 



Absciss-layer, the layer of cells along 

 which the leaf breaks away from 

 the stem in autumn, 80 (Fig. 55). 



Absorption of cell-wall, 25 (Fig. 15). 



Acacia, phyllodes of, 211. 



Acanthorhiza, 345. 



Accessory food-factors (vitamins), 

 662. 



Acetabularia, 370 (Fig. 275) ; iso- 

 gametes of, 557. 



Acetic acid bacteria, 452. 



Achene, a one-seeded nut, 323 ; of 

 Buttercup, 322 (Fig. 242). 



Achlya, on dead flies, 403. 



Aconitum, zygomorphy of, 274 (Fig. 

 199) ; pollination by Humble-Bee, 

 302 ; follicles of, 322 (Fig. 240), 

 623 (Figs. 473, 475). 



Acorus (sweet-rush), root of, 84 (Fig. 

 58) ; dorsiventrality of, 208. 



Acquired characters, doctrine of non- 

 inheritance of, 569. 



Acrocarpic, applied to Mosses which 

 fruit at ends of stems, 467. 



Acropetal, applied to a succession of 

 appendages in which the latest 

 formed are nearest the apex of the 

 part that bears them : of leaves, 

 69 ; of parts of flower, 265. 



Actinomorphic, or radial symmetry 

 of a shoot, where development is 

 equal on all sides, 200 (Figs. 133, 



134). 2 74 ( Fi g- l8 7)- 



Adaptation, special modification 



which arises in relation to the 



environment, 193, 219, 342 ; origin 



of, 586. 

 Adaxial surface, of the leaf, that 



facing the stem in development, 



68, 72 (Figs. 47, 48). 

 Adhesion, the fusion of parts of 



distinct categories in the flower, 



266. 

 Adhesive-climbing, 217 (Fig. 146). 

 Adiantum, embryo of, 504-505 (Figs. 



397-399). 



Adonis, floral diagram of spiral 

 flower, 264 (Fig. 188). 



Adsorption, 33. 



Adventitious, applied to buds formed 

 not in the normal sequence, pro- 

 pagation by, 252 (Fig. 176), 348 ; 

 do. roots, 348. 



Aecidium on Barberry, 398, 433 (Fig. 



33o), 437 (Fig- 337)- 

 Aecidium-buds, or spores, 433, 438 ; 



of Phragmidium, 439 (Fig. 338). 

 Aerobic organisms, those which live 



normally exposed to atmospheric 



air, 136-137. 

 Aerotropism, response to the stimulus 



of unequal aeration, 160 ; positive 



in roots of pot-bound plants, 160 ; 



negative in pollen-tubes, 161 (Fig. 



97» A). 



Agaricus campestris (Mushroom), 

 401, 402 (Fig. 344). 



Agrimonia, floral construction of, 267 

 (Fig, 191) ; hooked-fruits of, 328 

 (Fig. 251). 



Agrostemma (corn-cockle), conduct- 

 ing tissue of style, 293 ; pollen- 

 tubes of, 304 (Fig. 222). 



Air bubbles in vessels, 108. 



Alae, lateral petals of Pea-flowers, 636 

 (Fig. 489). 



665 



