508 



INDEX. 



Lens, magnifying, xxviii. 



Lenticels, of Sambucus nigra, 183 (fig. 

 74). 



Lepidium sativum, Pythium upon, 321. 



Leptome, 105. 



Leptothrix buccalis, 276 (fig. 102). 



Leucojum, pollen-grains of, 386; pol- 

 len-tubes, 392. 



Leucoplasts, 58 ; of Verbascum, 56 ; of 

 Iris germanica, 59 (fig. 22) ; of 

 Phajus, 59 (fig. 21) ; epidermal 

 cells of Tradescantia, 84-5 ; sta- 

 minal hairs of Tradescantia, 39 ; 

 Verbascum nigrum, 41. 



Lichens, structure of, 239 ; reproduc- 

 tion, 270 (fig. 93). 



gelatinous, 240. 



Life histories (life cycle), 287. 



Light, effect on chlorophyll bodies, 53, 

 197 ; relations with leaf structure, 

 197 ; action on spermatozoids, 303 ; 

 on bacteria, 285. 



to control for working, xxix ; arti- 



ficial, xxix. 



Lignin, reactions for, 78, 111, 145. 



Ligulatae. See Selaginellese. 



Ligule, 366. 



Lilac. See Syringa vulgaris. 



Lilium, development of anthers and 

 pollen, 385 ; culture of pollen- 

 tubes, 393 ; structure of pistil, 

 396 ; of egg-apparatus, 405. 



cell and nuclear division in, 438. 

 Lime. See calcium. 



See Tilia europoea. 



wood, use in cutting-sections, 409. 

 Limiting cell. See heterocyst. 

 Ling. See Calluna vulgaris, 

 Linin, 436. 



Litium, mucilages of, 429. 

 Liverwort. See Marcliantia. 

 Lobelia, culture of pollen-tubes, 393. 

 Loculus (of ovary), 395. 

 Logwood. See Hsematoxylin. 

 Loose-strife. See Lysimachia. 

 Lupinus albus, aleurone grains in 



seed, 32. 

 Lycopersicum,ora,iage chromatophores, 



55. 

 Lycopodiiim complanatuin, structure of 



stem, 176 (fig. 70). 

 - Selago, structure of stem, 178. 

 Lysigenous, 102, 179, 193. See also 



intercellular spaces and glands. 

 Lysimachia, pollen-tubes of, 393 ; pistil 



of, 397. 



MACERATING mixture, Schultze's 158, 



186. See also Appendix III. 

 Macrosporangia, 366, 399. 

 Macrospore. See under spore. 

 Magenta. See fuchsin. 



Magnesia sulphate, use of, 251, 281 , ysy. 



Magnification, to calculate, 43. 



Maidenhair tree. See Ginkgo. 



Maize. See Zea Mais. 



Male fern. See Aspidium. 



Malic acid, as stimulant for spermato- 

 zoids of ferns, 361. 



Malvaceae, pectose mucilages of, 429. 



Malva crispa, pollen-grains, 388 (fig. 

 142). 



Manubria, in Chara, 306. 



Maple, autumnal coloration of, 58. 



Maranta arundinacea, starch of, 18. 



Marchantiaceae, 233. 



Marchantia polymorpha, air- pores, 236 

 (fig. 91) ; thallus, 233 ; oil-bodies, 

 234; rhizoids, 235; gemmae, 233, 



339 (fig. 122) ; sexual reproduction, 



340 (figs. 123, 124) ; fertilisation, 

 243 ; sporogonium, 244. 



Mare's tail. See Hippuris vulgaris. 

 Matthiola annua, hairs on leaf, 92 



(fig. 33). 

 Mechanical stage to microscope, 280. 



tissue or system, 66, 106, 132, 176, 



196, 198. 

 Mechanics of Zea Mais, 107 ; of Equise- 



tum, 181 ; of a leaf, 196. 

 Medulla (of lichens), 337. 

 Medullary rays, structure in Draccena 



Draco, 120; Pinus sylvestris, 146 



(fig. 54), 149 (fig. 56) ; in Tilia, 154 



157 (fig. 61). 



secondary, 154. 

 Mericarp, 411. 

 Meristem, 211, 215, 219. 

 Mesocarp, 414, 424. 

 Mesophyll, 191 (fig. 76). 

 Mesothecium (of anther), 383. 

 Mestome, 105. 



Methyl blue, use of, 46, 50, 111, 270, 

 273, 274, 381. See also aniline 

 blue, and Appendix III. 



- green, acetic, 28, 46, 115, 202. See 



also Appendix III. 



- violet, use of, 46, 53, 55, 111, 113, 



270, 273. See also Appendix III. 

 Metric system, transfer table in. See 



Appendix I., 459. 

 Micrococcus prodigiosus, 268. 

 Micro-fungi, moist chamber cultures, 



318. 

 Micrometer-screw. See microscope. 



stage, xxviii, 43. 



Micropyle, 371 (fig. 135), 399 (figs. 145- 



8), 424. 

 Microscope, essentials for a good, xxiii ; 



stands and objectives, xix. 



compound, 1-9 (figs. 3, 4) ; how to 



use, 10-13 ; to clean after use, 24. 



simple (or dissecting), xxvii, 205 



(figs. 79, 80, 81). 



