epiphyllous 



Epitrophy 



petiole and blade are developed ; 

 epiphyll'ous, -us, growing on leaves; 

 epiphyllosperm'ous (<nrepfJLa, seed), 

 bearing seed or the like on leaf-like 

 organs, as the dorsiferous Ferns. 



Epiph'ysis (^7ri0i;w, to grow up), pro- 

 tuberances round the hilum or for- 

 amen of some seeds ; strophioles. 



Ep'iphyte (ri, upon, QVTOV, a plant), a 

 plant which grows on other plants, 

 but not parasitically ; an air-plant ; 

 epiphy'tal, epiphytic, relating to 

 epiphytes ; epiphy'toid (e^os, like), 

 used in ~ Par'asites, as Loran- 

 thaceae and Santalaceae ; Ep'iphy- 

 tism, the condition of epiphytes ; 

 epiphyte' tic, used of wide-spreading 

 disease in plants, as an epidemic 

 (Crozier ); Ep'iplasm ( ir\d<T/j.a, 

 moulded), protoplasm rich in gly- 

 cogen, which remains in the ascus 

 after the formation of ascospores ; 

 glycogen-mass ; Epipleu'ra (irXevpcL, 

 a rib), the outer half of the diatom- 

 girdle, belonging to the epitheca ; 

 Epipod'ium (TroDs, TroSoj, 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 glands upon the stipe of 

 an ovary ; (3) J the stalk of the 

 disk itself (Lindley) ; epipol'yarcli 

 (77-0X1)5, many, apx^ beginning), the 

 division of the median protoxylem 

 in a triarch stele (Prantl) ; epip'- 

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

 winged, especially at the summit. 



Epirrheol'ogy (ttrippcw, I overflow, 

 Xcryos, discourse), the effects of 

 external agents on living plants. 



epirhi'zous, -zus (tirl, upon, pla, a 

 root), growing on roots ; as certain 

 parasites ; episep'alous( + SEPALUM) 

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

 fore the sepals'; Ep'isperm (ffirtppa, 

 seed), the coat or outer covering 

 of the seed, spermoderm, perisperm; 

 episperm'icus, exalbuminous ; Epi- 

 sporang'ium (cnropa, seed, tiyyeiov, 

 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. 



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 (eirl, upon, + TETRABCH), 

 when in a triarch stele, the third 

 (median) protoxylem group is 

 divided (Prantl) ; epitnall'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'ciuin, the surface of the fructi- 

 fying disc in Lichens ; Epithelium 

 (#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 (^n-idrj/j.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- 

 stda. 



epitri'arch (^Tri, upon, + TRIARCH), 

 when in a triarch stele, the third 

 (medial) protoxylem group is upper- 

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

 (r/)o0r>, 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); 



91 



