INDEX. 



The page numbers in hold type indicate illustrations. 



Abano, Sphserotilus in hot springs at, i. 554. 



Abele. See Populus alha. 



Abies, and Witches' Broom, ii. 526. 



— axillary buds, ii. 29. 



— fertilization, ii. 420. 



— green cotyledons, ii. 622. 



— needles, ii. 725. 



— pollen storing and dispersion, ii. 145. 



— protection of ovules, ii. 72. 



Abies excelsa and galls of Chermes abietis, 



ii. 544. 



cone characteristics, ii. 725. 



egg-cells, ii. 419. 



embryo development, ii. 438. 



flower-opening constant, i. 559. 



Pine-apple Gall on twigs, ii. 534. 



stamen, ii. 87. 



various dimensions, i. 722. 



vertical range, i. 527. 



Abies orientalis, cotyledons, i. 621. 

 Abies pectinata, i. 717. 



and JEcidium elatinum, ii. 523, 527. 



annual rings and sinkers of Mistletoe, 



i. 210. 



bract scale, ii. 440, 441, 721. 



cone, ii. 441, 721, 725. 



embryo development, ii. 438. 



ovuliferous scales, ii. 441. 



Abietinese, arrangement of scales, ii. 440. 



— distinguishing feature, ii. 721. 



— embryo development, ii. 438. 

 Abronia, unequal cotyledons, i. 622. 

 Absorbent cells, i. 765. 



of cotyledons, i. 599, 600. 



Absorption bands of chlorophyll spectrum, i. 



372. 

 Absorption-cells, i. 87, 217. 

 capitate or glandular, of multicellular 



hairs, mode of action, i. 229. 



controlling influences, i. 90. 



form of, i. 86. 



fungal hyphae a substitute for, i. 249. 



in Leucobryum, &c., i. 86. 



in Nepenthes pitcher, i. 135. 



in special cavities and grooves in leaves, 



i. 230. 



of Bartsia, i. 180. 



of CuBcuta, of Oassythae, i. 176. 



of foliage-leaves, other than trichomes, 



restricted action, i. 230. 



of Lathrsea, i. 182. 



of leaves, conditions of action, i. 227. 



of Mildews, i. 166. 



of Orchid aerial roots, i. 223. 



of Plagiothecium, i. 85. 



of Rhinanthaceae, i. 178. 



of roots, permeability, &c., i. 226. 



of Saprophytes, i. 114. 



of Stellaria media, i. 228. 



of Thesium, i. 177- 



of XJtricularia bladders, i. 121. 



of water-receptacles, proof of acting as 



such, i. 240. 



on leaf-cuttings, ii, 42. 



on leaves of Tamarisks, Frankenias, &o., 



mode of development, i. 236. 



position of, i. 88. 



replaced by mycelium, i. 91. 



shape in relation to food-supply, &c., 



1.90. 



Absorption of food-salts, i. 85. 



— of rain and dew, by foliage-leaves, i. 225. 



— of water by foliage-leaves, i. 232. 

 Absorption-roots, of Saprophytes, i. 116. 

 Absorptive cavities and cups on foliage- 

 leaves, i. 233. 



— organs, of some Plumbaginese, i. 234. 

 Abu-Arisch, Arabia, shade temperature, i. 



556. 

 Abutilon Aviceunse, autogamy, ii, 355. 



cross-fertilization, ii. 304. 



Acacia. See also Robinia Pseudacacia. 



— pollen-chambers, ii. 90. 



— popularly so called, i. 534. 



— reception of insects, ii. 230. 



— root-slips, ii. 28. 



— scent, ii. 201. 



— true, diurnal positions of leaves, i. 534, 



— unprotected pollen, ii. 107. 



Acacia cafEra, &c., hosts of Sarcophyte, i. 



196. 

 Acacia lophantha, Australia, leaf, diurnal 



positions, i. 534. 

 Acacia spadicigera, myrmecophilous, ii. 233. 

 Acacia sphsfirocephala, myrmecophilous, ii. 



233. 

 Acacias, Australian, coloured stamen fila- 

 ments in, ii. 183. 



distribution of stomata on phyllodes, i. 



281. 



leaf metamorphoses, i. 637. 



phyllodes, i. 335. 



wax on leaves, &c., i. 292, 312. 



Acalypha, stamen, ii. 87. 

 Acanthacese, ii. 771. 



— and cold, i. 545. 



— inflorescence, i. 746. 



— pollen-sprinkling apparatus in, ii. 271. 



— scarlet flowers in, ii. 196. 

 Acantholimon, absorptive organs, i. 234. 



— acicular leaves, i. 434, 437. 



— and spiny Tragacanth-shrubs, Persian 



steppes, i. 435. 



— calcareous incrustation, i. 237. 



— habitat, i. 235. 



Acantholimon Sengaoense, absorptive or- 

 gans, &c.. i. 235. 



leaf, and section of part, i. 233. 



lime incrustations, i. 235. 



Acanthophyllum, leaves, i. 434. 

 Acanthus, and insect visits, ii. 223. 



— coloui -contrast in flower, ii. 191. 



— cross-fertilization, ii. 304. 



— emerging of leaves from soil, i. 639. 



— honey protection, ii. 241. 



— pollen-sprinkUng apparatus, ii. 273. 



— protection of pollen from wefc, ii. 110. 

 Acanthus longifolius, flower, and pollen- 

 sprinkling apparatus, ii. 273. 



Acanthus mollis, habit, ii. 772. 



mildew of, i. 166. 



seed-dispersal, ii. 833, 835. 



Acanthus spinosissimus, i. 437. 



Acanthus spinosus, pollen-sprinkling, ii. 273. 



Acanthus spinulosus, hybrid of A. mollis x A. 



spinosissimus, ii. 586. 

 Acarina, i. 138. 



Acarospora glaucocarpa, habitat, i. 117. 

 Acarus, prey of tJtricularia montana, i. 123. 

 Acaulesceut Gentians, autogamy, ii. 387. 



Acaulescent Violas, cleistogamy, ii. 393. 

 Accessory organs, of flowers, ii. 71. 



— substances, of plants, i. 460. 



Acer and Gleditschia triacanthos, struggle for 

 existence, ii, 515. 



— and Nectria, ii. 678. 



— arrangement of foliage-leaves, i. 92. 



— colour of flowers and flies, ii. 197. 



— from chalk, ii. 613, 



— green cotyledons, i. 622. 



— hybrids in, ii. 584. 



— mechanical tissue arrangement, i. 729. 



— roots, i. 753. 



— texture of so-called mite-galls, ii. 532. 



— vernation, i. 350. 



Acer campestre, mite-galls, ii. 529. 



Acer Monspessulanura, seed-dispersal, ii, 



853. 

 Acer platanoides, distribution of sexes, ii. 



297. 



flower-opening constant, i. 559. 



leafy twig, i. 416- 



normal and sucker leaves, ii. 516. 



seedling, i. 9. 



twig and elongation of leaf-stalks, i. 



419. 



venation, i. 631. 



Acer Pseudo-platanus, distribution of sexes^ 



ii. 297. 



imperfect flowers, ii. 295. 



Acer rubrum, i. 488. 



Aceras and Orchis, hybridization, ii. 583. 

 Aceroste, of Braun, ii. 605. 

 Acetabularia, colonies, i. 585. 



— marine lime accumulators, i. 261. 

 Acetabularia mediterranea, structure, &c. 



ii. 646. 

 Acetabularise, differentiation of thallus, ii 



646. 

 Acetic acid, from alcohol, i. 506. 

 Achene, embryo protection, ii. 450. 



— nature of, ii. 429. 



— of Gnaphahum alpinum, ii, 84. 

 Achenes, with pappus, ii. 432. 

 Achillea, hybrids, ii. 585. 



— peripheral flowers, ii. 187. 



Achillea Clavennse, habitat and hairiness, i. 



316. 

 Achillea Millefolium, anthocyanin, i. 522. 



gall-mites and flower metamorphosis, 



ii. 548. 

 Achillea ochroleuca, i. PI. VI. 

 Achimenes, ternary hybridization, ii. 560 

 Achlya, asexual zoospores, ii. 480. 



— fruit, &c., ii. 480. 



— host for Saprolegniacese and Chytridese, i, 



170. 

 Achlya lignicola, sexual organs, ii. 671. 

 Achlya prolifera, ou flies and flshes, i. 105. 



sporangia, &c,, ii. 17- 



swarm-spore formation, ii. 669. 



Achlya racemosa, host of Rhizidiomyces 



apophysatus, i. 170. 

 Achorion Schoenleinii, cause of ringwormr 



i. 168. , 

 Acid, acetic, from alcohol, i. 506. 



— butyric, i. 463; ii. 623. 



— caproic, ii. 202. 



— carbonic. See also Carbonic acid. 

 dissociation by symbiotic Algse, i. 254, 



