Epipodioxn 



Epivalve 



^yllopodium 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 (Lindle^) ; epiporyarch 

 {iToKvs, many; Apx', beginning), the 

 division of the median protoxylem 

 in a triarch stele (Prantl) ; epipro'- 

 teoid (+ proieoid), applied to 

 plants whose leaves have sclero- 

 gamnus cells on the upper surface 

 (Vesque) ; epip'terous, epip'terus 

 {irrepoy, a wing), winged, especially 

 at the summit. 



Epirrheorogy 'Jinppea), I overflow ; 

 ^6yos, discourse), the effects of 

 external agents on living plants. 



cpirhi'zous, -ziis (iirl, upon; f>iCa, & 

 root), gi'owing on roots, as certain 

 ]>arasites ; episep'alou8( + SEPALUM) 

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

 fore the sepals ; Ep'ispenn {airep^a, 

 seed), the coat or outer covering 

 of the seed, spermodenn, perisperm ; 

 epispermlcus, exalbuminous ; Epi- 

 BporaEg'ium {criropa, seed; ayyuov, 

 a vessel), the indusium of Ferns ; 

 Ep'ispore, Ejnspor'iuvi, 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 ; 

 episporlc, connected with the outer 

 coat of a spore ; epistamina'lis 

 (-f Stamen), on the stamens, as 

 hairs ; epistat'ic {cTariKhs, caus- 

 ing to stand), applied to a unit- 

 character becoming invisible but 

 not inactive (Shull) ; Epist'asis 

 is the condition ; epistom'eons 

 {orrSfMa, a mouth), "spigot-shaped" 

 (Heinig). 



Epist'roplie {iirta-rpotp^, turning about), 

 the arrangement of chlorophyll 

 granules on the upper and lower 

 faces of the cells in diffused light ; 

 cf. AposTRorHE ; adj. epistroph'ic ; 

 ~ Int'erval, or Epistroph'ion, S. 

 Moore's term for that range of in- 

 tensity of sunlight needed to pro- 

 duce Epistrophe ; Epistrophiza'tion, 

 the condition described . Epist'ro- 

 phy, Morren's term for the reversion 



of a monstrous form to the normal 

 condition : epanody, 



epitact'ic {iidTaKTos, commanded), 

 placed behind another; cf. panto- 

 tactic ; PARATACTIC. 



Epit'eospores, — ae, (iirl, upon ; -f 

 Spora), spores in a sorus surrounded 

 by prominent paraphyses, as in the 

 genus Epitea, Fries, whence the 

 term ; epitet'rarch (-f Tetkarch), 

 when in a triarch stele, the third 

 (median) protoxylem gi-oup is divided 

 (Prantl) ; epithall'ine {Oawhs, a 

 young shoot), growing on the tliallus; 

 EpithaH'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 [d-hKij, a case), 

 the outer and larger half-frustule of 

 Diatoms ; adj. epitbe'cal ; Epithe'- 

 cium, the surface of the fructifying 

 disc in Lichens ; Epithe'lium {diiKv, 

 a nipple), (1) any distinct layer of 

 one or more cells in thickness which 

 bounds an internal cavity ; (2) t = 

 Epidermis. 



Eplthem, or Epithe'ma, pi. Epithe'- 

 mata {imdrifia, a cover), masses of 

 tissue in the mesophyll of leaves, 

 serving as internal hydathodes, the 

 cells being usually devoid of chloro- 

 phyll, as in Crassula. 



epitri'arch [M, upon, -f triarch), 

 when in a triarch stele, the third 

 (medial) protoxylem group is upper- 

 most, t.ei ventral (Prantl) ; epitroph'ic 

 {rpo<p)), nourishment), having rela- 

 tion to Epitrophy (Wiesner) ; Epit'- 

 ropliy,tlie 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) ; epitrop'ic {rp6'Kos, 

 direction), below the axis ; epicotyl- 

 ary ; Epit'ropism = Geotropism ; 

 epit'ropoas (rpoir^, a turn), denotes 

 an anatropous ovule with its rapLe 

 averse when ascending, adverse 

 when suspended ; Epivarva, Epi- 

 valve {valva, a valve), the valve 

 belonging to the epitheca of a 



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