GLOSSABY And geineIraL index to Vol. li. 52? 



whicli the separate steles remain for 

 the most part independent during 

 their longitudinal course 



Diaphragm of Salvinia, 148 



Selaginella, 163 



Diarch. A term applied to the stele of a 

 root "which has only two protoxyleon 

 groups 



Diastase, 455, 456 



Dichogamy, 519 



Dichotomous hranching. Branching 

 which results from the division of a 

 growing point with two equal parts 



in Liverworts, 105 



in Selaginella, 160 



Diolinism, 520 



Diclinous, A term applied to plants 

 whose flowers coutaiu either stamens 

 or pistU, but not both 



Didynamous. A term applied to an an- 

 drcecium which consists of two paii's 

 of stamens, one pair being shorter 

 than the other 



Differ enliationy histological. The de- 

 velopment or various kinds of cells in 

 the interior of a plant 



— morphological. The ' segregation of 

 the plant body into differait members 



— physiological. The assignment of 

 different functions to different struc- 

 tures, or diiferent parts of a plant 



Dicedous. Producing the male and 

 female gametes on different plants. 

 Also appUed to Phanerogams in which 

 staminate and pistillate flowers are 

 produced on differeut plants, 520 



Diplostemonous, A term used to indicate 

 that an audrcecium consists of two 

 whorls of stamens in regular alterna- 

 tion with the perianth leaves 



Dissepiments. The partitions wluch are 

 found in some compound ovaries 



Distribution of seaweeds, 34, 48 



Dorsiventral leaves. Those whose upper 

 and Jower halves have a different 

 structure 



Dwarf-male, 61 



Ectoplasm. The outer la. er of the proto- 

 plasm of a cell 



Egg-apparatus, 182 



Elaioplasts, 452 



Elaters of HepaticEe, 102 



— — Equisetum, 154 



Embryo of Cycade^, 177 



Embryonic branches of Chara, 39 



Emergences. Outgrowths from a plant 

 which consistof ground tissue, covered 

 by epidermis 



Emulsin, 456 



Endophytic. Living in cavities in other 

 plants, 40 



Endosperm of Selaginella, 163 



Gymnosperms, 173 



Angiosperms, 183 



Entomophilous, 519 



Enzymes, 446, 454 



Epiblema. The outermost layer of cells 

 covering the root 



Epicofyl. The part of a seedhng which 

 extends from the insertion of the coty- 

 ledons to that of the first foliage leaves 



Epigynous. Springing apparently from 

 the summit of the ovary. A term 

 applied to corolla and stamens 



Epinasty, 475 



Epiphragm, 119 



Epiphytes. Plants which grow attached 

 to other plants, but do not derive 

 nourishment from them parasitically, 

 481 



Epiplasm, 85 



Episperm. The outer coafc of the seed 



Epispore, 147, 154 



Epistrophe, 487 



Erythrophyll, 464 



Erythrozym, 456 



Etiolated plants, 485, 486 



Etiolin, 485 



Eusporangiate. Having sporangia which 

 arise from more than one cell, 122 



Evolution of sex, 47, 55, 59; 516 



sporophyte, 516 



Exceptions to typical characters in 

 Calyciflorae, 261, 364 



Exceptions to typical characters in 

 Disciflorse, 261, 330 



Exceptions to typical characters in 

 Gamopetalae, 262 



Exceptions to typical characters in 

 Thalamiflorse, 261, 303 



Excretion, 46 



Exodermis. A peculiarly thickened layer 

 of cells, lying generally immediately 

 under the epiblema of the root 



Fatigue, 503 



Fertilisation. The fusiou of two dis- 

 similar gametes. The term is some- 

 times used to signify the application 

 of the pollen of a flowering plant to 

 the stigma or ovule. This should, 

 however, be CBlleC. pollination ^ 517 



Floats of macrospore of Azolla, 147 



Poliose liverworts, 104 



Formation of carbohydrates, .442 



proteids, 444 



Prustule, 41 



Fungus-cellulose, 69 



Gametangium. The structure iu which 

 sexual cells are prodiiced 



Gametes. Sexual cells 



Gametophore. Any special part of the 

 gametophyte on which gametangia, 

 autheridia^or archegooia are borne 



Gametophyte. The phase of the plant 

 which is marked by the power of pro- 

 duction of sexual cells or gametes. It 

 may be actual or potential, 31, 515 



Gamodesmic. A term used to indicate 

 that the several vascular bundles of a 

 stele are fused together instead of 



