INDEX AND GLOSSARY 



683 



supported without losing the power 

 of perfect recovery. 



Limit of mechanical resistance, 603. 



Limiting factor, 119. 



Linen, fibres of, 177. 



Lines of Descent, 355. 



Linin, anastomosing threads in the 

 nucleus which bear the chromatin, 

 560. 



Linkage, the tendency of certain 

 genes to be associated in inherit- 

 ance, due to their being located in 

 the same chromosome, 579-581 

 (Figs. 440, 441). 



Lipase, the enzyme which decom- 

 poses fats, 125, 129. 



Loam, 97. 



Locomotion, 167. 



Locus, in genetics, the definite posi- 

 tion on a chromosome occupied by 

 a given gene, 580 (Fig. 440). 



Lodicules, two tumid scales in the 

 flower of Grasses, held to represent 

 two obliquely anterior segments of 

 the perianth : 617 (Fig. 464). 



Lodoicea, protoplasmic continuity in, 

 27 ; reserve-cellulose in, 125 (Fig. 

 83) ; floating fruit of, 327. 



Lolium (Rye-grass), 616 (Fig. 464). 



London Pride, 631. 



Long-day type, 152. 



Loosestrife (Lythrum), 140. 



Loranthus, parasitism of, 222, 223 

 (Fig. 150). 



Lotus corniculatus, 635 (Fig. 489). 



Lousewort (Pedicularis), root para- 

 sitism of, 222 (Fig. 149). 



Loxsoma, solenostele of, 596-597 

 (Fig. 452). 



Lupin, reserve cellulose in, 125. 



Luzula, 614. 



Lychnis flos-cuculi, 620 (Fig. 470) ; 

 diurna, 621 (Fig. 471). 



Lycopodiales, the Club Mosses, 3, 

 511 (Chap, xxxii.) ; seed-habit in, 

 521. 



Lycopodium, mycorrhiza in, 230 ; 

 distal branching of, 348 ; stele of, 

 594- 



Mace, the arillus of the nutmeg, 319. 



Macrocystis, 378. 



Maianthemum, 607. 



Maize, 8 ; stem of, 51 (Figs. 29, 30, 



31) ; strut-roots of, 191 (Fig. 



128) ; analysis of, 660 ; origin of, 



661. 

 Malaxis paludosa, adventitious buds 



of, 247. 



Male Fern (Dryopteris), 483-502 ; 

 stock of, 484 (Fig. 374) ; leaf and 

 sorus of, 482 (Fig. 373), 495 (Fig. 

 387) ; anatomy of, 484-493 (Figs. 



374-385)- 



Male flower of Coniferae, 533 (Figs. 

 420, 421). 



Male gametes, male sexual cells, 287, 

 305 (Fig. 226) ; behaviour of, in 

 fertilisation of Seed Plants, 306- 

 309 (Figs. 227-229) ; of Pine, 536 

 Fig. 424) ; of Zamia, 527 (Fig. 



415). 540. 



Malformations, caused by Fungi, 396 

 (Fig. 295). 



Malic acid, in fertilisation of Ferns, 

 502. 



Maltase, 123, 129. 



Maltose, 123. 



Malva, pollen-tubes of, 304 (Fig. 

 222, B). 



Mannitol, 380. 



Maple sugar, in sap, 108. 



Marchantiales, structure of, 472. 



Marginal placentation, of ovules in- 

 serted on the margins of the car- 

 pels, 291. 



Marsh Marigold (Caltha), delayed 

 germination, 140 ; anther of, 281 

 (Fig. 202) ; pollen-sac and pollen 

 of, 282-286 (Figs. 203-207) ; carpels 

 of, 289 (Figs. 208, 210) ; ovules of, 

 294 (Figs. 216, 217), 623 (Fig. 472). 



Marsilia Drummondii, chromosomes 

 of, 506 ; parthenogenesis in, 587. 



Marsupium, a nursing sac containing 

 the young sporogonium of certain 

 Liverworts, 474. 



Materials, translocation of, 130. 



Mechanical construction, Chap, x., 

 p. 168. 



Mechanical function of woody stem, 67. 



Mechanical limitations of size, 168, 

 186, 603. 



Mechanical stimulus, 163. 



Mechanical tissues, 175 ; physical 

 qualities of, 178, 179 ; disposition 

 of, 180 ; in stems, 181 ; in leaves, 

 186 ; in roots, 190. 



Media for bacterial culture, sterilisa- 

 tion of, 449. 



Median plane, in a floral diagram, 

 the plane including the axis, and 

 the midrib of the bract, 263. 



Medullary rays, plates of paren- 

 chymatous tissue running radially 

 from the cambium, inwards into 

 the wood, and outwards into the 

 bast : 57 (Figs. 36, 37, 39), 62 

 (Figs. 40, 41), 64 (Fig. 42). 



