depressed 



Development 



wall, more or less covering it, in 

 various forms. 



depressed, depres'sus (Lat.), sunk 

 down, as if flattened from above ; 

 depress'o-trunca'tus = RETUSE ; De- 

 pres'sio (Lat.), a pressing or sink- 

 ing down, a little hollow ; ~ dor- 

 sa'lis, a depression in the spores of 

 some Agarics extending along the 

 back of the spore ; ~Mla'ris, a 

 similar depression, but of less ex- 

 tent, above the hilum (Fayod). 



deregula'ris J (de, opposed ; regularis 

 in order), between regular and ir- 

 regular (Lindley). 



Derivative Hy'brids, those sprung 

 from a union of a hybrid, and one 

 of its parent forms or another 

 hybrid. 



Der'ma (Se'/y* a > 5e/>/*aros, skin), surface 

 of an organ, bark, or rind ; Derma- 

 calypt'rogen (KaXvirrpa, a veil ; 

 Yewao^Ibringforth), Schwendener's 

 term for a common histogen which 

 produces root- cap and root-epider- 

 mis in Phanerogams ; derm'al, relat- 

 ing to the outer covering ; ~ Tis'sue, 

 the substance of the epidermis and 

 periderm; dermati'nus, applied to 

 those plants such as Lichens, which 

 live on bark or epidermis ; der- 

 mat'ioid (ddos, form), skin-like in 

 function or appearance ; Derm'ato- 

 cyst, Dermatocys'tis (KIHTTIS, a bag 

 or pouch), inflated hairs on the sur- 

 face of the sporophore of young 

 Agarics ; Dennat'ogen (yevvau, I 

 bring forth), the meristem forming 

 the layer of nascent epidermis ; 

 primordial epidermis ; Dermat'- 

 ophyte (tpvrbv, a plant), any Fungus 

 parasitic on the skin of man or 

 other animals (Crozier) ; Dermat'- 

 osomes (o-w/ia, a body), Wiesner's 

 term for granular bodies in rows, 

 united and surrounded by proto- 

 plasm, which form the cell-wall ; 

 Dermoblas'tus (/SXatrr&s, a shoot), 

 " the cotyledon formed by a mem- 

 brane that bursts irregularly " 

 (S. F. Gray) ; Dermocalypt'rogen 

 see DERMACALYPTROGEN. 



deBcend'ing,descen'de?is (Lat. ), tending 



gradually downwards; (1) as the 

 branches of some trees ; (2) as the 

 roots ; Axis, the root system ; 

 ~Metamorph'osis, substitution of 

 organs of a lower grade, as stamens 

 for pistils, petals for stamens, etc. ; 

 ~ Sap, formerly applied to the 

 Cambium ; Descen'sus J = Root. 



Desertion of Host = LIPOXENY. 



des'inens, Desinen'tia (Lat., ceasing), 

 ending in, the manner in which a 

 lobe terminates. 



Desmobry'a (5e<r/tds, a bond ; fipvov, a 

 moss), a division of Ferns, where 

 the fronds are adherent to the 

 caudex ; cf. EREMOBRYA ; Des'- 

 mogen (yevvaw, I bring forth), dis- 

 tinguished as pri'mary~, the pro- 

 cambium, or embryonic tissue from 

 which the vascular tissue is after- 

 wards formed ; or sec'pndary ~, 

 formed from the cambium, after- 

 wards transformed into permanent 

 vascular strands. 



destructive Metab'olism, those changes 

 which take place during the waste 

 of tissues ; ~ Par'asite, one which 

 seriously injures or destroys the 

 host. 



detect'us (Lat., laid bare) = naked. 



determinate, determine/ tus (Lat., 

 bounded), definite ; ~ Growth, 

 when the season's growth ends with 

 a bud ; ~ Inflores'cence, when it 

 ends with a bud, as in cymes ; De- 

 termina'tion, -atio, the ascertaining 

 the names and systematic position 

 of plants, identification. 



Deuterog'amy (5eJre/>os, the second ; 

 ydfws, marriage), peculiar nuclear 

 fusions in certainCryptogams, super- 

 posed upon and subsequent to the 

 sexual act (P. Groom); Deutero- 

 plas'ma (irXfofta, moulded) = PARA- 

 PLASM ; sometimes contracted into 

 Deut'oplasm ; Deuterostroph'ies 

 (crr/>o0^, a twist or turn), spirals 

 of a third degree in the develop- 

 ment of leaves. 



Development, the gradual extension 

 of the parts by which any organ or 

 plant passes from its beginning to 

 its maturity. 



