INDEX AND GLOSSARY 



^63 



Hymenium. the larger bearing asci 

 or basidia, in Fungi or Lichens, 

 440 ; of Hymenomj-cetes, 451 

 (Fig. 3S7) ; of Mushroom, 453. 



Hymenomycetes, 451. 



Hypha, the fungal filament 404 ; 

 non-septate, 410 ; septate, 410 ; 

 traversing tissue of host, 407 



(Fig- 34^)". 419 (Fig- 354I- 



Hypobasal tier, the part of an 

 embryo hing below the basal wall : 

 in Ferns, 346. 



Hi.'pocotyl, region of stem below the 

 Cotyledons, 11 (Fig. 4), 49 (Fig. 36). 



H\'poderina. tissue below the epider- 

 mis, often mechanically strength- 

 ened, 63. 



Hvpodermal cells, those U"ing below 

 the epidermis, 249. 



Hypogynous, of flowers, with stamens 

 and other outer parts seated below 

 the .g^moecium, 237 (Fig. 1S5). 



H^-pophysis, cell giWng rise to the 

 root-tip in the embryo of Dicoty- 

 ledons, 275 (Fig. 217). 



Iceland ^loss (Cetraria), 439. 



Imbibition, water of, S4. 



Immune \"arieties, of Potato, 419 ; of 



^^^leat, 449. 



Immunity, where two organisms may 

 be in relation, but neither has 

 power against the other, 203. 



Inarching, or approach-grafting, 217 

 (Fig. 166). 



Indusium, of Ferns, 337 (Fig. 27S). 



Inferior, applied to the o\-ary when 

 sunk below the level of the other 

 floral parts, 234 (Figs. 1S7, iSS). 



Inflorescence, a common branch- 

 svstem bearing a number of flowers, 

 220 (Chap, xiii.) ; 223 ; definite 

 or cymose inflorescence, 224 (Fig. 

 170) ; indefinite or racemose, 224 

 (Fig. 170), 225 ; radial and dorsi- 

 ventral, 22S. 



Integuments, the coverings investing 

 the nucellus of an ovule, 23S (Figs. 

 206, 207). 



Intercellular spaces, 36, 62 (Fig. 45), 

 63 (Fig. 46), 64 (Fig. 47), 70. 



Interchange of gases, in photo- 

 synthesis and respiration, 113. 



Interpolation of plants, where extra 

 primordia appear in spaces norm- 

 allv unoccupied, 232. 



Inulase, the ferment converting inulin 



into sugar, 112. 

 Inulin, storage of in Dahlia, 109. 

 Invertase, an enzyme wliich converts 



cane sugar into invert-sugar, 112. 

 Involucre, a .group of protective 



bracts, 226 (Fig. 175), 227; 534 



(Fig. 440), 538 (Fig. 444). 

 Iridaceae, 492, 496. 

 Iris, perennial stock of, 164 (Fig. 



1221 ; leaf arrangement of, 171 ; 



dehiscence of anthers, 245 (Fig. 



191) ; flower of, 492, 496 (Fig. 400). 

 Iron, importance of, 94. 

 Irregular nutrition, obtaining organic 



substance by some other process 



than b^' photo-synthesis, 1S7 (Chap, 



xi.) : secondary in Flowering Plants. 



210 ; in Thallophytes, 372. 

 Irregular propagation, 477. 

 Irritabihtv, power of reaction to 



stimulus, 124 ; referable to the 



living protoplast, 12S- 

 Isoetes lacustris, 317. 

 Isogametes, sexual cells of equal size, 



461 ; of Brown Seaweeds, 379. 

 Ivy. skeleton of lamina, 60 (Fig. 43) : 



climbing shoots negati^'ely helio- 



tropic, 127; adhesi\'e roots, 1S3. 



Juncaceae, 492, 500. 

 Juncus lamprocarpus, 501 (Fig. 403). 

 Jungermanniales, 365, 366 (Fig. 310). 

 Juniper, 302. 



Kidne}' Bean, S ; anah'sis of, 542. 



Klinostat, a clock-work arrange- 

 ment for slowly rotating a plant 

 under experiment, 123. 



Krakatau, new flora of, 295. 



Labellum, 499 (Fig. 402). 

 ! Labiatae, 532 (Fig. 43S) ; glandular 

 hairs of, 177. 

 Laburnum, hard wood of, 53 ; zygo- 



morphy of, 240 (Fig. 189). 

 Lactuca scariola v. sativa (Lettuce), 

 percentage of water in, 84 ; analy- 

 sis of, 541 ; origin of, 342. 

 Lamina, the leaf-blade, 58 : struc- 

 ture of, 61 (Fig. 44), 62 (Fig. 43), 

 j 64 (Fig. 46) ; venation of, 156 

 I (Fig. 116). 



Laminaria, 377, 378 (Fig. 317). 

 N2 



