964 



INDEX, 



Xigella. nectaries, ii, 179. 



Nigella arvensis, effect of mutilation, ii. 



517. 

 Nifella Damasccna, styles, i. 645. 

 Niyella data, honey-leaf, ii. 180. 

 Nik'clla sativa, honey-leaf, ii. 180. 

 Night-flowers, ii. 213. 

 Nightshade. Alpine Enchanter's. See CirccEa 



alpina, 



— scent, ii. 202. 



Xigritella, position of labellum, ii. 224. 

 Nigritella nigra, scent, ii. 201. 

 Nigritella suaveolens, hybrid, ii. 563, 586. 



hybrid, colonr of flowers, ii. 567. 



Nipple-wort. See Lapmna. 

 Nisaolia, phyllodes, i. 335. 

 Nitella, characteristic feature, ii. 661. 

 Nitella syncarpa, freezing, i. 540, 542. 

 Nitric acid, agent in ■vceathering, i. 83. 



earlie.=it source, i. 64. 



reduction, i. 458. 



sources of, i. 83. 



Nitrification of soil, by Bacteria, ii. 624. 

 Nitrogen, i. 258. 



— fixation by Bacteria, ii. 624. 



— in albumen, i, 457. 



— non-accumulation from hydrophytes, i, 



261. 



— percentage in air. i. 64. 



— replacing hydrogen, i. 454. 



— sources of, i. 64. 457. 



Nitrogenous compounds, not respired di- 

 rectly, i. 495. 



probably obtained by water-absorbing 



aerial organs, i. 241. 

 Nitrogenous matter, effect on glands of 



Drosera, i. 144. 

 Nodding of flowers, and protection of 



pollen, ii. 119. 

 Nodes, of stem, i. 396, 658. 



— relation of hairs to, in Stellaria media, i. 



227. 

 Noea spinosissima, spinosity, i. 444. 

 Nolanacese, ii. 771. 

 Nonnea, pollen-grains, ii. 99. 

 Non-saprophytes, on trees, i. 106. 

 Norway Maple. See Acer platanoides. 

 Nostoc and CoUema, ii. 694. 



— association with other plants, ii. 622. 

 Nostoc edule, ii. 621. 



NostocaceEB, as Lichen-algae, ii. 692. 



— description, ii. 621. 



— filaments, i. 586. 



— habit, i. 589. 



NostocineiB, lime incrusted, i. 260. 



— loss of bulk through loss of water, i. 216. 

 Notochlaena Marantae, rolling up of frond, i. 



314. 

 Nottingham Catclifly. See Silene nutans. 

 Nucellus, of ovule, ii. 72, 81, 644. 

 Nucleus, of cell, and starch - formation in 

 Spirogyra, ii. 657. 



central organ, i. 53. 



composition, &c., i. 41. 



functions, ii. 493. 



importance of, i. 48. 



in streaming protoplasm, i. 34. 



structure, i. 569. 



structure and division, i. 580, 581. 



— of ovule, i. 644. 



— of starch grain, i. 460. 

 Nullipores, fossil Floridese, ii. 614. 

 Nuphar, ovary, ii. 75. 



— position of stomata on leaves, i. 280. 

 Nuphar intermedium, fertility, ii. 590. 

 mean cross, ii. 558. 



Nuphar luteum and N. pumilum, hybrid, 



ii. 558, 589. 

 Nutating tendrils, i. 696. 

 Nutation, of roots, i. 774. 



— of twining stems, i. 683. 

 Nut, embryo protection, ii. 450. 



— nature of, ii. 429. 



" Nut-cracker" and Walnut, &c., ii. 446. 

 Nutmeg. See Myriatica mosckata. 

 Nutrition and gamete-formation, ii. 641. 



— and sexual organs of Vaucheria, ii. 644. 



Nutrition, mode of, best determined by 

 artificial cultiu'es, i. 104. 



— of plants, mutation, translocation, &c., of 



subslancfs concerned in. i. 258. 

 Niix-vomica, cells from seed, i. 45. 

 Nyctaginacea;, calcium oxalate crystals, i. 570. 



— perianth, ii. 749. 



— pollen-grains, ii. 97, 102. 

 Nyctagineu), ii. 196. 



Nyctaiulra, dehiscence of pollen-sacs, ii. 93. 



— stamen, ii. 91. 



Nyiiiphasa, floating fruits, ii. 848. 



— leaf and tran-i^pi ration, i. 288. 



— position of stomata on leavcä, i. 280. 



— protection of pollen, ii. 113, 

 Nymphaia alba, ash of, i. 69. 



contrivance for getting rid of rain- 

 water, i. 288. 



habit and habitat, ii. 511. 



latitude and closing, ii. 218. 



pollen-grains, ii. 99, 100. 



Nymphsea coerulea, scent, ii. 201. 

 Nymphsea Devoniensis, size of flowers, ii. 



185. 

 Nymphcea gigantea, size of flowers, ii. 185, 

 Nymphaia guianensis, epipbyllous buds. ii. 



43. 

 Nyniphfea Lotus and N. dentata, hybrid and 



sepals, ii. 576. 



anthocyanin, i. 521. 



Nymphsea thermalis, anthocyanin, i. 521. 

 Kymphseacese, anther, ii, 90. 



O. 



Oak. See Quercus. 

 Oak-apples, nature of, ii. 528. 

 Oak-galls, various, ii. 541. 

 Oak-leaves, galls on, ii. 552. 

 Oat. See Arena saliva. 

 Oats, pollination, ii. 142. 



— starch, i. 459. 



Obione halimifolia, "deaf" fruits, ii. 468. 



Ochna, flower and fruit, ii. 778. 



Ochrus, phyllodes, i. 335. 



Ocymum and cold, i. 545. 



Ocymum Basilicum, pericarp mucilage, i. 



615. 

 Odoutidium hiemale, in spring above Arzler 



Alp, i. 71. 

 Odontites, parasitic, i. 176. 

 Odontites lutea, culture experiment, i. 180. 

 Odontoglossum, edible fleshy growths, i. 170, 

 Odontoglossum Rossii, duration of flowering, 



ii. 214. 

 Odour, and poisonous properties, i. 431. 

 Odours, variety in a genus, kc, ii. 487. 

 CEdogoniacea). ii. 650. 

 (Edogonium and Chytridium Olla, ii. 669- 



— chlorophyll body, i. 373. 

 ~ life-history, ii. 650. 

 CEnanthic acid. ii. 202. 

 (Enothera, and insect visits, ii. 223. 



— downward pull of roots, i. 767. 



— moths and pollen, ii. 247. 



— opening of fiower, ii. 212. 



— stigma, ii. 283. 



CEoothera biennis, autogamy, ii. 253. 



flower, ii. 247- 



inflorescence, ii. 282. 



pollen-grains with viscin threads, ii. 101. 



(Enothera grandiflora, opening of flower, ii. 



212. 

 (Enothera muricata, autogamy, ii. 253. 

 Offshoots, cihated, ii. 802. 



— dispersal by water, ii. 805. 



— formation and climatic conditions, ii. 453, 



— on runners, ii. 801. 



— propagation by, ii. 790. 

 Oil, of bitter almonds, i. 462. 



— of cloves, ii. 200. 



— of Neroli, source, ii. 203. 



— of turpentine, lavender, &c., i. 461. 

 Oken, nature -philosophy (1810), i. 13. 

 Olacaceae, ii. 754. 



Old Man's Beard Lichen. See Usnea barbata. 



Old World, hairiness of plants on steppes and 



deserts, i. 317. 

 Oleaceae, ii. 771. 



Oleander. See Ntrium Oleander. 

 Olfactory organs, in man and animals, ii. 204. 

 Olive grove on the shores of Lake Gartla, i. 



275. 



— oil. decomposition, i. 462. 

 Olive-tree, stomata. i. 280. 

 Ombropbytum, appearance and dimensions, 



i. 196. 



— Peruvian name, i. 196. 



Omphalia. in salt-mine at Ilallstatt, i. 101 

 Omphalodes verna, fiuwer colour and sur- 

 roundings, ii. 194. 

 Onagraceae, ii. 781. 



— pollen-grains, ii. 99, 102. 

 Oncidium, aerial roots, i. 222, 753. 



— edible fleshy growtlis, ii. 170. 

 Oncidium Papiho, PI. XIll. 



animal mimicry, ii. 229. 



Onion. See Alliurn. 



Onobrychis, insects and keel movements, ii. 



252. 

 Onobrychis Eequidentata.hooked fruit, ii. 873. 

 Onobrychis comuta, spinosity, i. 444. 

 Ononis, pollen expulsion, ii. 260. 

 Onopordon. metbodof water-conduction, i. 96. 



— movements of stamens, ii. 252. 



— protection of pollen, ii. 126. 



— spiny leaves, i. 438. 

 Onosma. bristles, i. 441. 

 Ontogeny and phyllogeny. ii. 608. 

 Oogonia, of Achlya lignicola, ii. 671. 

 Oogonium, definition, ii. 47. 



— of FucuB vesiculosus, ii. 663. 

 Oomycetes, characteristics, ii. 668. 

 Oophyte. of Pteridopbyta, characteristic«, iL 



704. 

 Ooplasm, protection in Phanerogams, ii. 72. 

 Ooplast. of Phanerogams, ii. 81. 

 Ooripheres, of Chloropbycew, ii. 628. 

 Oospore, of Chlorophyce», ii. 628. 

 Optgrapha lithyrga. habitat, i. 117. 

 Opera Girl. See Mantisxa. 

 Operculum, of Moss capsule, ii. 702. 

 Ophelia, nectaries, ii. 178. 

 Ophioglossacese, characteristics, ii. 709. 



— two kinds of fronds, ii. 12. 

 Ophioglossum vulgatmn, radical buds, ii. 28. 

 Ophrys comuta, flower, ii. 226. 



— — insect platform, ii. 227. 



Opium, latex of Papaver somniferum, i. 470. 

 Opium Poppy. See Papaver somniferum. 

 Opoponax Cretica, seed-dispersal, ii, 853. 

 Opuntia, insect platform, ii. 229. 



— irritable staminal filaments, ii. 264. 



— opening of flower, ii. 212. 



— protection of pollen, ii. 113. 



— spines, i. 446. 



— stem structure, i. 327. 



Opuntia nana, recurrent opening, ii. 213. 



stigma, ii. 279. 



Opuntia Rafinesquii, barbed bristles, i, 439. 

 Oracbe. See Atripkx. 

 Oraches, and animals, i. 432. 



— trimethylamine, i. 462. 

 Orange-flower scent, ii. 203. 



Orange Lily. See Lilium croceum and L. 



bulbiftrum. 

 Orange-tree, odours, i. 461. 

 Orchid inflorescence, position of flowers to 



axis, ii. 256. 

 OrchidaceiB, characteristic of flower, ii. 736. 



— cleistogamy in, ii. 393. 



— epipbyllous buds, ii. 43. 



— hybrids among, ii. 583. 



— ovary, ii. 77. 



— pollination, details, ii. 253. 



— subdivisions, ii. 736. 

 Orchids, anther, ii. 93. 



— aqueous tissue, i. 328. 



— chlorophyll in roots, i. 766. 



— chlorophyll in seeds. &c,, i. 376. 



— conducting tissue for pollen-tubes, ii. 410. 



— cross-fertilization, ii. 302. 



— cylindrical leaves in, i. 327. 



