GLOSSARY AND GENERAL INDEX TO VOL. IL 527 



which the separate steles remain for 

 the most part iudepeudeut 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 

 gi-oups 



Diastase, 455, 456 



Dichogamy, 519 



Dichotomous branching. Brandling 

 which results fi'om the division of a 

 growing point with two equal parts 



in Liverworts, 105 



in Selaginella, 160 



Diclinism, 520 



Diclinous. A term applied to plants 

 whose flowers contain either stamens 

 or pistil, but not both 



Didunamous. A term applied to an an- 

 drcecium which consists of two pairs 

 of stamens, one pair being shorter 

 than the other 



Differentiation, histological. The de- 

 velopment of various kinds of cells in 

 the interior of a plant 



— morphological. The segregation of 

 the plant body into different members 



— phi/siological. The assignment of 

 different functions to different struc- 

 tures, or different parts of a plant 



Dioecious. Producing the male and 

 female gametes on different plants. 

 Also appUed to Phanerogams in which 

 stamiuate and pistillate flowers are 

 produced on different plants, 520 



Dijylosteynonous. A term used to indicate 

 that an androecium consists of two 

 whorls of stamens in regular alterna- 

 tion with the perianth leaves 



Dissepiments. The partitions which are 

 found in some compound ovaries 



Distribution of seaweeds, 34, 48 



Dorsiventral leaves. Those whose upper 

 and lower halves have a different 

 structure 



Dwarf -male, 61 



EctojJlasm. The outer la, er of the proto- 

 plasm of a cell 



Egg-apparatus, 182 



Elaioplasts, 452 



Elaters of Hepaticae, 102 



Equisetum, 154 



Embryo of Cycadea;, 177 



Embryonic branches of Chara, 39 



Emergences. Outgrowths from a plant 

 which consist of 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 



Epihlema. The outermost layer of cells 



covering the root 

 Epicotyl. The part of a seedling which 

 extends from the insertion of the coty- 

 ledons to that of the first foliage leaves 

 Ejjigynous. 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 

 I nourishment from them parasitically, 

 481 

 Epiplasm, 85 

 ! Episperm. The outer coat of the seed 

 ' Epispore, 147, 154 

 I Epistrophe, 487 

 I Erythropliyll, 464 

 ! Erythrozym, 456 



Etiolated plants, 485, 486 

 Etiohn, 485 



Eusporangiate. Having sporangia which 

 arise from more tlian one cell, 122 

 [ Evolution of sex, 47, 55, 59, 516 



sporophyte, 516 



Exceptions to typical characters in 



Calyciflorte, 261, 364 

 Exceptions to tvpieal characters in 



Discifloras, 261, 330 

 Exceptions to typical characters in 



Gamopetalae, 262 

 Exceptions to typical characters in 



Thalamiflorae, 261, 303 

 Excretion, 46 



Exodermis. A peculiarly thickened layer 

 of cells, Ij'ing generally immediately 

 under the epiblema of the root 



Fatigue, 503 



Fertilisation. The fusion 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 called pollination, 517 



Floats of macrospore of Azolla, 147 



FoUose liverworts, 104 



Formation of carbohydrates, 442 



proteids, 444 



Frustule, 41 



Fungus-cellulose, 69 



Gametangium. The structure in which 

 sexual cells are produced 



Gametes. Sexual cells 



Gametophore. Any special part of the 

 gametophyte on which gametangia, 

 antheridia^or archegonia 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 



