INDEX. 



The page numbers in holde^^ type indicate illmtrations. 



Abano, SphBerotilns iu hot springs at, i. 554. 



Abele. See Populus alba. 



Abies, and Witches' Broom, 11, 626. 



— 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 Ohermes 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. 



ovulif erous scales, ii. 441. 



Abietinese, arrangement of scales, ii. 440. 



— distinguishing feature, ii. 721. 



— embryo development, ii. 438. 

 Abronla, 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, 1. 86. 



— — fungal hyphae a substitute for, i. 249. 

 in Leucobryum, &c., 1. 86. 



in Nepenthes pitcher, i. 135. 



in special cavities and grooves in leaves, 



i. 230. 



of Bartsia, i. 180. 



of Cuscuta, of Cassythae, i. 176. 



of f ohage-leaves, other than trichomes, 



restricted action, 1. 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 Rhinanthacese, 1. 178. 



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



of Saprophytes, i. 114. 



■ of Stellaria media, i. 228. 



of Thesium, 1. 177. 



of TJtricularia 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, 1. 225. 



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

 Absorption-roots, of Saprophytes, i. 115. 

 Absorptive cavities and cups on foliage- 

 leaves, i. 233. 



— organs, of some Plumbagineee, i. 234. 

 Abu-Arisch, Arabia, shade temperature, i. 



556. 

 AbutUon Avicennje, autogamy, ii. 355. 



cross-fertilization, ii. 304. 



Acacia. See also Rohtnia Psevdacacia. 



— pollen-chambers, ii. 90. 



— popularly so called, 1. 534. 



— reception of insects, ii. 230. 



— root-sUps, ii. 28. 



— scent, ii. 201. 



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



— xmprotected pollen, ii. 107. 



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



196. 

 Acacia lophantha, Australia, leaf, diurnal 



positions, 1. 534. 

 Acacia spadicigera, myrmecophilous, ii. 233. 

 Acacia sphserocephaJa, myrmecophilous, ii. 



233. 

 Acacias, Australian, coloured stamen fila- 

 ments in, 11. 183. 



distribution of stomata on phyllodes, i. 



281. 



leaf metamorphoses, i. 637. 



phyllodes, i. 335. 



wax on leaves, &c., 1. 292, 312. 



Acalypha, stamen, ii. 87. 

 Acauthaceae, 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, 1. 435. 



— calcareous incrustation, i. 237. 



— habitat, 1. 235. 



Acantholimon Senganense, absorptive or- 

 gans, &o., i. 235. 



leaf, and section of part, i. 233. 



lime incrustations, i. 235. 



Acanthophyllum, leaves, 1. 434. 

 Acanthus, and insect visits, ii. 223. 



— coloui -contrast in flower, ii. 191. 



— cross-fertilization, ii. 304. 



— emerging of leaves from soil, 1, 639. 



— honey protection, ii. 241. 



— pollen-sprinkling apparatus, ii. 273. 



— protection of pollen from wet, ii. 110. 

 Acanthus longifolius, flower, and poUen- 



sprinkling apparatus, ii. 273. 

 Acanthus mollis, habit, ii. 772. 



mildew of, i. 166. 



seed-dispersal, ii. 833, 835. 



Acanthus spinosissimus, i. 437. 



Acanthus spinosxw, polleo-sprinkling, ii. 273. 



Acanthus spinulosns, hybrid of A. mollis x A. 



spinosissimus, Ii. 586. 

 Acarina, i. 138. 



Acarospora glaucocarpa, habitat, i. 117. 

 Acarufi, prey of TJtricularia montaoa, i. 123. 

 Acaulescent Gentians, autogamy, ii. 387. 



Acaulescent Violas, cleistogamy, ii. 393. 

 Accessory organs, of flowers, ii. 71. 



— substances, of plants, 1. 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, 1. 729. 



— roots, i. 753. 



— texture of so-called mite-galls, 11. 532. 



— vernation, i. 350. 



Acer campestre, mite-galls, ii. 529. 



Acer Monspessulanum, 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, 1. 9. 



twig and elongation of leaf-stalks, 1. 



419. 



venation, i. 631. 



Acer Pseudo-platan us, distribution of sexes, 



11.297. 



imperfect flowers, 11. 295. 



Acer rubrum, i. 488. 



Aceras and Orchis, hybridization, ii. 583. 

 Acerosse, of Braun, ii. 605. 

 Acetabiilaria, colonies, i. 585. 



— marine Ume accumulators, 1. 261. 

 Acetabularia mediterranea, structure, &o. 



ii. 646. 

 Acetabulariae, diflerentiation of thallus, 11 



646. 

 Acetic acid, from alcohol, 1. 506. 

 Achene, embryo protection, ii. 450. 



— nature of, ii. 429. 



— of Gnaphalium alpinum, ii. 84. 

 Achenes, with pappus, 11. 432. 

 Achillea, hybrids, ii. 585. 



— peripheral flowers, ii. 187. 



Achillea Clavennse, habitat and hairiness, 1. 



316. 

 Achillea MillefoHum, anthocyanin, 1. 522. 



gall-mites and flower metamorphosis, 



ii. 548. 

 Achillea ochroleuca, i. PI. VI. 

 Achlmenes, ternary hybridization, ii. 560 

 Achlya, asexual zoospores, ii. 480. 



— fruit, &c„ ii. 480. 



— host for Saprolegniaceee and OhytrideEe, i, 



170. 

 Achlya lignicola, sexual organs, 11. 671. 

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



sporangia, &c., ii. 17. 



swarm-spore formation, ii. 669. 



Achlya raceraosa, host of Rhizidiomyces 



apophysatus, i. 170. 

 Achorion Schoenleinii, cause of ringworm, 



1.168. 

 Acid, acetic, from alcohol, 1. 506. 



— butyric, 1. 463; ii. 623. 



— caprolc, 11, 202. 



— carbonic. See also Carbonic acid. 

 dissociation by symbiotic Algte, i. 254. 



