INDEX. 



The page numbers in bolder type indicate illv^traiions. 



Abano, Sphserotilus in hot springs at, L 554. 



Abele. See Popvlus alha. 



Abies, and Witcbes' Broom, ii. 526. 



— axillary buds. ii. 29. 



— fertilization, ii. 420. 



— green cotyledons, ii. 622. 



— needles, ii. "725. 



— jwlleo 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 tmgs, ii. 534. 



stamen, ii 87. 



various dimensions, i. 722. 



vertical range, i. 527. 



Abies orientalis, cotyledons, i. 621. 

 Abies pectinata, i. 717. 



and j3Ecidium 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. 



Abietineae, 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. 



AbsorptiOQ 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, 1. 180. 



of Cuscuta, of Cassythae, i. 176. 



of foliage-leaves, other than tricbomes, 



restricted action, i- 230. 



of Lathr^a, 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 trtricularia bladders, i. 121. 



of water-receptacles, proof of acting as 



such. i. 240. 



on leaf-cuttings, ii. 42. 



on leaves of Tamarisks, Frankenias. &c. , 



mode of development, i. 236. 



position of, i. 88. 



replaced by mycelium, i. 91. 



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



i. 90. 



Absorption of food-salts, i. 85. 



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



— of water by foUage-leaves, i. 232. 

 Absorption -roots, of Saprophytes, i. 115. 

 Absorptive cavities and cups on foliage- 

 leaves, i. 233. 



— organs, of some Plumbagineae, i. 234. 

 Abu-Arisch, Arabia, shade temperature, i. 



556. 

 Abutilon AvicennEe, 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 caffra, &c., hosts of Sarcophyte, i. 



196. 

 Acacia lophantha, Australia, leaf, diurnal 



positions, i. 534. 

 Acacia spadicigera, myrmecopbilous, ii. 233. 

 Acacia sphaerocephala, myrmecophilous, ii. 



233. 

 Acacias, Australian, coloured stamen fila- 

 ments in, ii. 183. 



distribution of stomata on pbyllodes, i. 



281. 

 - — leaf metamorphoses, i. 637. 



phyllodes, i. 335. 



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



Acalypha, stamen, xi, 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 Senganense, 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. 



— colour -contrast in flower, ii. 191. 



— cross-fertilization, ii. 304. 



— emerging of leaves from soil, i. 639. 



— honey protection, ii. 241. 



— poll en -sprinkling apparatus, ii. 273- 



— protection of pollen from wet. ii. 110. 

 Acanthus longifolius, flower, and pollen- 

 sprinkling apparatus, ii. 273. 



Acanthus mollis, habit, it 772. 



mildew of. i. 166. 



seed-dispersal, ii. 833, 835. 



Acanthus spinosissimus, i. 437. 



Acanthus spinosus, poll en -sprinkling, ii. 273. 



Acanthus spinulosus, hybrid of A mollis x A 



spinosissimus, ii. 586. 

 Acarina, L 138. 



Acarospora glaucocarpa. habitat, i. 117. 

 Acarus, prey of TJtricularia montana, i. 123. 

 Acaulescent Gentians, autogamy, ii. 387. 



Acaulescent Violas, cleistogamy, ii. 393. 

 Accessory organs, of flowers, ii. 71. 



— substances, of plants, i. 460. 



Acer and Gleditschia triacauthos, 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-galJs, ii. 529. 



Acer Monspessulanmn, 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- 

 Acerosse, of Braun, ii. 605. 

 Acetabularia, colonies, i. 585. 



— marine hme accumulators, i. 261. 

 Acetabularia mediterranea, structure, &c. 



ii. 646. 

 Acetabularise, differentiation of thallus, ii 



646. 

 Acetic acid, from alcohol, i. 506. 

 Achene, embrj-o 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 ClavennK, 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 Saprolegniaceaa and Cbytridea?, i. 



170. 

 Achlya lignicola, sexual organs, ii. 671- 

 Achlya prolifera, on flies and fishes, i. 105. 



sporangia, &c., ii. 17- 



swarm-spore formation, ii. 669. 



Achlya racemosa, host of Rhizidiomyces 



apopbysatus, i. 170. 

 Achorion Schoenleinii, cause of ringworm, 



i. 168. 

 Acid, acetic, from alcohol, i. 506. 



— butyric, i. 463; ii. 623. 



— caproic, ii. 202. 



— carbonic. See also Carbonic acid. 



dissociation by symbiotic Alg;e, i. 254. 



