ex 



Ezhomotropy 



ex, privative prefix in place of e, when 

 a vowel follows. 



exalba'mlnoas, exalbumino'sus {ex, 

 priv. ; 4- Albumen), destitute of al- 

 bumen, used only of seeds when the 

 embryo occupies the whole cavity 

 within the testa ; escalate, exala'tus 

 {alatus, ■winged), wingless. 



exalta'tus (Lat., raised high), lofty, 

 tall. 



exai>%alate (ex, priv. ; annulus, a 

 ring), used of Ferns which do not 

 possess an elastic ring round their 

 sporangia. 



Exanth'etna(^|, out of ; 2i'0oj, a flower), 

 (1) a blotch on leaves, etc., as though 

 eruptive; (2) the " Dieback " of 

 CitrtLS ; Exanth'ium J bractlets of 

 the last degree, incapable of forming 

 axillary buds, and immediately ex- 

 ternal to the flower. 



exapophysa'tus [ex, priv. ; -f Apo- 

 physis), destitute of an apophysis, 

 or swelling below the capsule of a 

 Moss. 



©x'arcli (^f out of; apxh, origin), used 

 of vascular bundles in which the 

 whole primary wood is centripetal ; 



Cf. PERIXYLIC. 



exar'eolate, exareola'tus [ex, priv. ; -}- 

 AREOLATUs), not spaoed out or 

 marked into small areas ; exar'il- 

 late (+ Aiai.LA), without an aril; 

 exar'istate, exarista'tv.s (+ Arista), 

 destitute of awns. 



exas'perate, exa-spera'tus (Lat., rough- 

 ened), rough with hard projecting 

 points. 



ex cavate {excavaius, hollowed out), 

 as though dug out. 



excen'trio, excen'triciis {ex, out of; 

 centrum, the centre), one-sided, out 

 of the centre, abaxial. 



Ex'ciple, Ex'cipule.(Crozier), Excip'- 

 nlaxn, Excip'ulu!> (excipula, a basin), 

 wart-like excrescences on the thallus 

 of certain Lichens, which have a 

 narrow opening ; the portion of 

 thallus which forms the rim round 

 the base of apothecia. 



Excitabirity, ExcitahiVitas (excitahis, 

 roused), the faculty of responding to 

 external stimuli. 



Excoe'mum (^|, out ; oifj-dw, I issue), a 

 fringe or tuft of hair at the base 

 of the glumes in some, grasses 

 (Richard). 



Excoria'tion {ex, out of; corium, skin), 

 the falling otf of the outer layer of 

 the terminal cells of glandular or 

 capitate hairs, as in Geranium 

 (Heinig) ; Excortica'tion {corticatus, 

 covered with bark), the stripping of 

 bark. 



excres'cent {excresccns, growing out), 

 growing in an unnatural way, as a 

 wari; or other outgrowth ; Excres'- 

 cence, a gnaur or wart on the stem 

 of a tree ; enation. 



Excre'tiou (ex, out of ; cretus, sifted), 



(1) the action by which any sub- 

 stance is rejected from the organism ; 



(2) the thing itself excreted, as 

 gum, resin, honey, etc. ; excur'rent, 

 excur'rens (Lat., running out), (1) 

 running through to the apex and 

 beyond as a mucro ; (2) where the 

 stem remains central, the other parts 

 being regularly disposed round it ; 

 '-' Vena'tion, in -Ferns, when the 

 veinlet is directed outwards. 



exendosperm'ous (6|, out ; ivlov, with- 

 in; airepfia, seed), used of seeds which 

 have reserve material stored in the 

 embryo ; exendotrop^ic ( + Endo- 

 TROPic), when fertilized from another 

 flower of the same or a different 

 plant (K. Pearson) ; Exendot'ropy, 

 the condition itself. 



exe'sus:^ (Lat., eaten away), applied 

 to a surface irregularly sculptured 

 as though by corrosion. 



exfo'liate {ex, from; folium, a leaf), to 

 come away in scales or flakes, as the 

 bark of the Plane ; Exfolia'tion, 

 peeling off. 



exha'lant {exhalo, I exhale), breathing 

 out, as exhalan'tia Va'sa | imagin- 

 ary vessels in the epidermis, actually 

 the sides of confluent cells ; Ex- 

 hala'tion, the function discharged 

 by stomata in passing otf vapour ; 

 exhomotrop'ic, ( + homotropic), 

 when fertilized from the anthers of 

 the same, or a different plant (K. 

 Pearson) ; Exhomot'ropy, is ^he 



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