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 ;~hila’ris, a 
similar depression, but of less ex- 
tent, above the hilum (Fayod). 
deregula’ris + (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. 
Derma, (dépua, dépuaros, skin), surface 
of an organ, bark, or rind ; Derma- 
calypt’rogen (kahimrpa, a veil; 
yévvaw, bringforth), 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 (eléos, form), skin-like in 
function or appearance ; Derm’ato- 
cyst, Dermatocys'tis (kiorts, a bag 
or pouch), inflated hairs on the sur- 
face of the sporophore of young 
Agarics; Dermat’ogen (yévvaw, I 
bring forth), the meristem forming 
the layer of nascent epidermis ; 
primordial epidermis; Dermat’. 
ophyte (durdv, a plant), any Fungus 
parasitic on the skin of man or 
other animals (Crozier); Dermat’- 
osomes (cdua, a body), Wiesner’s 
term for granular bodies in rows, 
united and surrounded by proto- 
plasm, which form the cell-wall; 
Dermoblas’tus (8dacrds, a shoot), 
‘the cotyledon formed by a mem- 
brane that bursts irregularly” 
(S. EF. Gray); Dermocalypt’rogen 
see DERMACALYPTROGEN. 
descend 'ing, descen’ dens (Lat.), tending 
gradually downwards ; (1) as the 
branches of some trees ; (2) as the 
roots; ~ Ax'is, 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 t = Root. 
Deser’tion of Host = LiroxENny. 
des‘inens, Desinen’tia (Lat., ceasing), 
ending in, the manner in which a 
lobe terminates. 
Desmobry’a (decuds, a bond; Bpvor, w 
moss), a division of Ferns, where 
the fronds are adherent to the 
caudex; cf. ERemoprya; _ Des’- 
mogen (yévvaw, I bring forth), dis- 
tinguished as pri’mary~, the pro- 
cambium, or embryonic tissue from 
which the vascular tissue is after- 
wards formed ; or secondary ~, 
formed from the cambium, after- 
wards transformed into permanent 
vascular strands. 
destruct’ive Metab’olism, those changes 
which take place during the waste 
of tissues; ~ Parasite, one which 
seriously injures or destroys the 
host. 
detect’us (Lat., laid bare)=naked. 
deter’minate, determina’‘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, -atvo, the ascertaining 
the names and systematic position 
of plants, identification, 
Deuterog’amy (devrepos, the second ; 
yduos, marriage), peculiar nuclear 
fusions in certainCryptogams,super- 
posed upon and subsequent to the 
sexual act (P. Groom); Deutero- 
plas’ma (mAdopa, moulded) = Para- 
PLASM ; sometimes contracted into 
Deut’oplasm ; Deuterostroph’ies 
(crpoph, a twist or turn), spirals 
of a third degree in the develop- 
ment of leaves. 
Devel’opment, the gradual extension 
of the parts by which any organ or 
plant passes from its beginning to 
its maturity. 
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