INDEX 



(Asterisks denote Illustrations) 



Abies, *494, 496 



Abietoideae, 494 



Absciss layers, 150 



Absorption, 193 



Absorptive powers of soil, 199 



Acacia, *599, *600 ; gum, 71, 98 



phyllode, 45, 163, *210 ; seedling, *162 ; 



spliaerocephala (ant-plant), *235 

 Acaciae Gummi, 602 

 Acanthaceae, 668 

 Acanthorhiza, root-thorns, 49 

 Acanthus, 668 

 Accessory shoots, 20 

 Acer, 620, *621 ; leaf, *32 ; striatum, 



epidermis, 146 

 Aceraceae, 620 

 Acetabularia, *360 

 Acetic acid, 80 

 Achene; *520 

 Achillea, *505, 688 

 Achimenes, 666 

 Achlya, *381 

 Achnanthes, 350 



Acid substances excreted from roots, 200 

 Aconiti radix, 578 

 Aconitine, 226 

 Aconttum, *505, *573, 577, *578, *579 ; 



exotropism, *282 

 Acorus, *502, *534, 536 ; ethereal oil, 79 ; 



root, 121, *114 

 Acrocomia, fruit, *322 

 Actaea, 577 

 Actinomorphic flowers, 507 ; symmetry, 



15 



Adiantnin >'ifi/cn-i>i-//iii, budding, 31 

 Adonis, *573 

 Adventitious embryos, 302 ; formations, 



248 ; roots, 47*; shoots, 20 

 jEcidium, 404, *405 

 Aerating roots, 49 

 Aerial roots, 46 

 Aerobionts, 242 

 Aerotropism, 286 



Aeschynanthus, 666 



^Esculin, 80, 226 



-Esculus, *508, 620; bud -scales, 37; 



colleters, 109 

 ^Estivation, 38 

 Aethusa, *641 

 African Oil palm, see Elaeis 

 Agaricineae, 412 

 Agathis, 496 

 Agave, 213, 543 

 Aggeratttm, 682 

 Aggregatae, 679 

 Agrimonia, 597 

 Agrostemma, *570, 571 

 Agrostis, 530 

 Aira, 530 



Aitionomic movements, 272 

 Ajtiga, 659 

 Albugo, 382, *383 

 Albumen crystals, 77 

 Albuminous substances, formation of, 221 

 Alburnum, 133 

 Alchemilla, *506, *594, 597 ; apogamy, 



93, 517 ; exudation of water from, 20& 

 Alcoholase, 223 

 Aldrovanda, 591 

 Alectorolophus, 666 

 Aleurone, 76 

 Algae, 329 ; assimilation in, 217 ; form, 



13 ; fossil, 465 ; selective power, 194 

 Alisma, *518, 523 

 Alismaceae, 523 

 Alkaloids, 80, 226 

 Alkanet, Anchusa 

 Allium, 541 ; buds, 20 ; mucilage, 79 ; 



roots, *119, 121 

 Allochlorophyll, 62 

 Allotypic division, 86 

 Ala us, *557 ; root tubercles, 232 

 Aloe, 213, *540, 543 ; epidermis, *103 ; 



thickening, 144 



Aloes barbadensis, 543 ; socotrina, 543 

 Alopecitrus, 530 



721 3 A 



