Epigonium 



OF BOTANICAL TERMS. Equatorial Plane 



EPIGO'NIUM, the archegouium 

 in mosses after the capsule has 

 developed. It is frequently 

 ruptured, a part being carried 

 up to form the calyptra, and a 

 part remaining at the base ot 

 the sporangium or its stalk, as 

 the vaginule. Also an homol- 

 ogous sac enclosing the young 

 sporangium in Hepaticse. 

 EPIG'YNOUS, growing upon the 



ovary. 

 flPINAS'TIC, denoting curvature 

 resulting from growth on tbe 

 upper side of an organ making 

 it curve downward. Com- 

 pare Hyponastic. 

 EP'INAsTY, that state of a grow- 

 ing dorsi-ventral organ in 

 which the upper surface grows 

 more rapidly than the lower. 

 EPIPET'ALOTJS, upon the corolla. 

 EPIPHLCE'ODAL, upon tbe epi- 

 dermis or outer surface. Com- 

 pare Hypophlceodal. 

 EPIPHLtE'tJM, see Corky Layer. 

 EP'IPHRAGM, a membrane clos- 

 ing the month of the capsule 

 in mosses; also a delicate mem- 

 brane closing the cup-like spo- 

 rophore in Nidularia. 

 EPlPHYL'LOtJS, growing or in- 

 serted upon a leaf, or upon the 

 upper side. Compare Hypo- 



PHYLLOUS. 



EPIPHYTAL, see Epiphytic. 



EPIPHYTE, a plant growing 

 upon another but not nour- 

 ished by it ; air-plant. Com- 

 pare Parasite. 



fiPtPHYT'lC, growing upon 

 another plant but not nour- 

 ished by it; epiphytal; pseudo- 

 parasitic. 



EPlPHYTdT'IC, a term applied 

 by Erwin F. Smith to any 

 wide-spreading disease among 

 plants, corresponding to an 



epidemic among men or an 

 epizootic among animals. 

 EP'iPlASM, protoplasm which 

 remains in an ascus or other 

 unicellular sporangium after 

 the formation of the spores. 

 EPIP'TEROUS, winged at the 



apex. 

 EPlRPvHEdL'OGY. the portion of 

 physiological botany which 

 treats of the effects of ex- 

 ternal agents on living plants. 

 (Rare.) 

 fipiRFvHl'ZOtJS, growing upon 



roots. 

 EP'ISPERM, the seed-coat, espe 



daily the outer coat or testa. 

 EPISPORAN'GIUM, an old term 



for indusium. 

 SlP'ISPORE, the outer coat of a 



spore; exospore. 

 EPIS'TROPHE, said of chloro- 

 phyl-bodies when they take 

 their position along the outer 

 wall of the cell, usually when 

 the light is of medium inten- 

 sity. Compare Apostrophe 

 and Systrophe. 

 EPITHAL'LINE, growing upon 



the thallus. 

 EPtTHE'LltJM, any distinct layer 

 of one or more cells in thick- 

 ness bounding an internal cav- 

 ity. Formerly applied also to 

 delicate epidermis of rootlets 

 and other external parts. 

 EPiX'YLOtfS, growing upon 



wood, as many fungi. 

 ERIZO'IC, growing upon living 

 animals, either parasitic or not. 

 EQUAL, symmetrical; regular; 

 of the same number; like 

 another iu all respects, or in 

 length. 

 E'ftTJ ALLY - PIN'NATE, s e e 

 Abruptly-pinnate. 

 i EftUATO'RlAL PLANE, the plane 

 which passes through the equa- 



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