epiphyiious 



Epitrophy 



petiole and blade are developed ; 

 epiphyll'ous, -us, growing on leaves; 

 epiphyllosperm'ous (awepfj-a, seed), 

 bearing seed or the like on leaf-like 

 organs, as the dorsiferous Ferns. 



Epiph'ysis (e7r((/>i'/w, to grow up), pro- 

 tuberances round the hilum or for- 

 amen of some seeds ; strophioles. 



Epiphyte (eiri, upon, tpvrov, a plant), a 

 plant which grows on other plants, 

 but not parasitically ; an air-plant ; 

 epiphy'tal, epiphyt'ic, relating to 

 epiphytes ; epiphy'toid (elSos, like), 

 used in ~ Par'asites, as Loran- 

 thaceae and Santalaceae ; Ep'iphy- 

 tism, the condition of epiphytes ; 

 epiphyto'tic, used of wide-spreading 

 disease in plants, as an epidemic 

 (Crozier) ; Ep'iplasm (TrAacrytui, 

 moulded), protoplasm rich in gly- 

 cogen, which remains in the ascus 

 after the formation of ascospores ; 

 glycogen-mass ; Epipleu'ra (TrXeupd,, 

 a rib), the outer half of the diatom- 

 girdle, belonging to the epitheca ; 

 Epipod'ium (wovs, woSos, a foot), (1) 

 the apical portion of a developing 

 phyllopodium or longitudinal axis 

 of a leaf ; (2) J a form of disk con- 

 sisting of glauds upon the stipe of 

 an ovary ; (3) the stalk of the 

 disk itself (Lindley) ; epipol'yarch 

 (wo\vs, many, apx?], beginning), the 

 division of the median protoxylem 

 in a triarch stele (Prantl) ; epip'- 

 terous, epip'terus (irrepov, a wing), 

 winged, especially at the summit. 



Epirrheol'ogy (eirippeu, I overflow, 

 Xo'7os, discourse), the effects of 

 external agents on living plants. 



epirhi'zous, -zus (eiri, upon, pi'fa, a 

 root), growing on roots ; as certain 

 parasites ; episep'alous( + SEPALUM) 

 (1) on the sepals ; (2) standing be- 

 fore the sepals ; Ep'isperm (a-n-epfj.a, 

 seed), the coat or outer covering 

 of the seed, spermoderm, perisperm ; 

 episperm'icus, exalbuminous ; Epi- 

 sporang'ium (airopa, seed, dyyeiov, 

 a vessel), the indusium of Ferns ; 

 Ep'ispore, Epispor'ium, an external 

 coat or perinium formed from the 

 periplasm round the oospore in 



some Fungi and the spores of cer- 

 tain of the higher Cryptogams ; 

 epispor'ic, connected with the outer 

 coat of a spore ; epistamina'lis 

 ( + STAMEN), on the stamens, as 

 hairs. 



Epist'rophe (eTnarpo^rj, turning about), 

 the arrangement of chlorophyll 

 granules on the upper and lower 

 faces of the cells in diffused light ; 

 cf. APOSTROPHE ; adj . epistroph'ic ; 

 ~ Int'erval, S. Moore's term for 

 that range of intensity of sunlight 

 needed to produce Epistrophe ; 

 Epistrophiza'tion, the condition de- 

 scribed ; Epist'rophy, Morren's term 

 for the reversion of a monstrous 

 form to the normal condition. 



epitet'rarch (eiri, upon, + TETRARCH), 

 when in a triarch stele, the third 

 (median) protoxylem group is 

 divided (Prantl) ; epithall'ine 

 (0aXXos, a young shoot), growing 

 on the thallus ; Epithall'us, the 

 cortical layer of Lichens, by Zukal 

 employed for all modifications 

 of the cortical hyphae at the 

 margin or apex of the thallus, 

 which serve as protection to the 

 gonidia ; Epithe'ca (#77/07, a case), 

 the outer and larger half-frustule 

 of Diatoms; adj. epithe'cal ; Epi- 

 the'cium, the surface of the fructi- 

 fying disc in Lichens ; Epithe'lium 

 (#77X77, a nipple), (1) any distinct 

 layer of one or more cells in thick- 

 ness which bounds an internal 

 cavity ; (2) J = EPIDERMIS. 



Epithe'ma, Ep'itheme ( eirWrifj.a, a 

 cover), masses of tissue in meso- 

 phyll of leaves, serving as internal 

 hydathodes, the cells being usually 

 devoid of chlorophyll, as in Cras- 

 sula. 



epitri'arch (tVi, upon, + TRIARCH), 

 when in a triarch stele, the third 

 (medial) protoxylem group is upper- 

 most i.e.ventral(Prantl); Epit'rophy 

 (rpofpr), food), the condition when 

 the growth of the cortex on wood 

 is greater on the upper side of 

 the organ ; or having buds or 

 shoots on the upper side (Wiesner); 



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