INDEX 



435 



phyll-formation, 41, 74 ; 

 chloroplasts, no, in, 112 ; 

 enzyme-action, 56 ; leaf-struc- 

 ture, in, 168-70, 172 ; posi- 

 tion of leaves, 112 ; sleep- 

 movements, 115 ; stomatal 

 mechanism, 100 ; zoospores, 

 etc., 183, 214. 



Light, concentration of, 96 (fig.) ; 

 perception of, 95, 181 ; pro- 

 tection against, 95, 102, no, 

 in, 112, 199. 



Lignification, 32. 



Lignified walls, 32, 33, 68 ; re- 

 actions of, 32. 



Lignin, 32. 



Lignum vita? (Guaiacum officinale], 

 130. 



Ligule (of Selaginella), 318 (fig.). 



Liguliflorae, 153. 



Liliaceae, 371, 408. 



Lily (Lilium), no; embryo of, 371 

 (fig.) ; pollen and embryo sac 

 of, 367 (fig.) ; stamen of, 363. 



Lime (Tilia), secondary phloem of, 

 130 ; secondary wood of, 28, 

 120, 127. 



Lime-family (Tiliaceae), 103. 



Limestone rocks, role of Algae in 

 formation of, 204. 



Linaceae, 61. 



Linseed oil, 49. 



Linum usitatissimum, 34, 49. 



Lipase, 49, 53 ; extraction of, 54. 



Lister a ovata, embryo of, 371 (fig.). 



Litmus, 261. 



Liverworts, 180, 193, 269, 355, 407. 

 See Hepaticae. 



Lloyd's alcohol method (for deter- 

 mining stomatal aperture) , 

 99, 100. 



Lockjaw Bacillus (Bacillus tetani], 



263 (fig.)- 



Loculi (of ovary), 356, 364. 

 Loganiaceae, 61. 

 Logwood (Hcematoxylon campe- 



chianuwi), 126. 

 Lophocolea, 272, 280. 

 Loranthaceae, ovary of, 365. 

 Loss of sexuality, 214, 236, 245, 



305, 372. 



Low power (of microscope), 400. 

 Lowland forms of Alpine plants, 379. 

 Lupine (Lupinus), 30, 47, 52. 

 Lycoperdon, 245, 250, 251 (fig.). 

 Lycopodiales, 289, 310, 313-20 



(figs.), 407. 

 Lycopodium, 180, 289, 310, 314, 



16 (fig.), 318, 321, 407; L. 

 clavatum, 314, 315, 316 (fig.) ; 

 L. inundatum, 315 ; L. selago, 



314- 315. 



Lycopus euvopcBus, 174. 



Lyginopteris (Lyginodendrori) old- 

 hamia, 328-33 (figs.) ; ana- 

 tomy of, 328-30 (fig.) ; micro- 

 sporophylls of, 330, 331 (fig.) ; 

 ovules and seeds of, 331-3 

 (figs.) ; vegetative organs of, 

 328, 329 (fig.). 



Lyngbya, 205, 206 (fig.). 



Lysigenous secretory cavities, 151, 

 .152 (fig.). 



Lysimachia nemorum, stoma of, 160 



(fig.)- 

 Lythrum salicaria, 174. 



Macrocystis, 200. 



Madder (Rubia peregnna) stoma of 

 97 (fig-), 98. 



Mahogany (Sivietenia mahagoni], 

 126, 130. 



Maiden Hair Fern (Adiantum), sori 

 of, 291 (fig.), 296. 



Maiden Hair Tree (Ginkgo biloba), 

 326, 334, 408. 



Maize (Zea mais), disease of, 248 ; 

 grains of, 45, 52, 53, 384 ; 

 hybrid-endosperm of, 386 ; leaf 

 of, 117; root-structure of, 73, 

 74 (fig.) ; stem-structure of, 

 84-6 (figs.). 



Male Fern (Nephrodium filix-mas), 

 sorus of, 296 (fig.), 298 (fig.) ; 

 sporangium of , 299 (fig.) ; spore- 

 formation in, 307 (fig.) ; stem 

 of, 290, 294 (fig.). 



Male sexual cells, 186, 220, 389 ; of 

 Angiosperms, 364, 367 (fig.), 

 368 ; of Conifers, 349, 350, 351 

 (fig-), 353 ; of Fungi, 234, 236, 

 244 (fig.). See also Spermato- 

 zoids. 



Malic acid, 60, 302. 



Mallow (Malva), 130, 152 ; ovule 

 of, 358 (fig.). 



Mallow-family (Malvaceae), hairs 

 of, 102, 103 ; stamens of, 360. 



Malt, 46, 256, 257 ; sugar, 45. 



Maltase, 47, 53. 



Maltose, 45, 46, 53, 56 ; hydrolysis 

 of, 47, 53 ; reactions of, 47. 



Malva, 130, 152 ; ovule of, 358 (fig.). 



Malvaceae, hairs of, 102, 103 ; 

 stamens of, 360. 



