Dictyosporangium 
(ADDITIONS) 
edaphic 
Dictyosporan’gium (dlxrvov, a net, + 
SPoRANGIUM), the sporangium of 
Saprolegnia, with encased spores 
germinating within the sporangium 
(Walpole and Huxley); Dictyox’- 
ylon (év\ov, wood), applied to the 
cortex of a fossil stem possessing 
a netted system of hypodermal 
fibrous strands, asin Lyginodendron 
(Scott). 
Dientomoph'ily (+ ENToMOPHILY), 
when in a species, some individuals 
are adapted for insect-fertilization 
by a different group of visitors 
from the remaining individuals 
(Engler and Prantl); Dimonoe’- 
eism (+ Monoscism), the condi- 
tion of two out of three kinds of 
monoecious flowers, having perfect 
flowers, and (a) male, (b) female, or 
(c) neuter flowers also (Knuth). 
Dictyu’chus State of Saprolegnieae, 
= Dicryosporaneium (Hartog). 
Di‘odange (+ Drops, a-yyefov,a vessel), 
a group of diodes surrounded by one 
or more layers of sterile cells (Van 
Tieghem). 
diplos’tichous (c7lxos, a row), in two 
series or rows; diplox’ylous, dip- 
loxylic. 
Dis’cals, Bessey’s proposed abbrevia- 
tion of Disciflorae, a series of poly- 
petalous Phanerogams. 
Dise or Disk, add (7) the expanded 
base of the style in Umbelliferae ; 
(8) in a bulb, the solid base of the 
stem, around which the scales are 
arranged. 
Discentra‘tion (dis, apart, centrum, 
centre), used by C. F. Schimper 
for (a) fasciation of the axis, and 
(6) multiple of a leaf-organ (Pen- 
zig). 
Dischis’ma (dls, two, cxlcua, separa- 
tion), the fruit of Platystemon, 
which divides into longitudinal 
carpels, each of which again 
divides transversely. 
disjune’tive (disjunctivus, disjoined) 
Symbio’sis, applied by Frank to 
those cases in which the sym- 
bionts do not form an associated 
organism, but are temporarily 
associated, as in the case of insects 
and plants. 
Dis'trophy (rpo¢#, nourishment), em- 
ployed by Re for disparity in size 
of homologous organs. 
dodecan’der, dodecandrous. 
dolichosty’lous (+ Styx), in dimor- 
phic or trimorphic species applied 
to the long-styled form. 
Dom‘itoform (domitus, tamed, forma, 
form), a cultivated form, the 
original being unknown or dis- 
similar (Kuntze). 
doub‘le Fructifica’tion, dimorphism 
in fruit, applied to certain Algae ; 
~ Nee’dle, in Sciadopitys, a dwarf 
branch without bud-scales, the two 
leaves being fused together at the 
edges into one needle. 
Dromot’ropism (dpduos, a course, 
Tporh, a turning), the irritability 
of climbing plants which results in 
the spiral growth (Macmillan) ; 
adj. dromotrop’ic. 
Drupe, false, a nut-like fruit where 
the lower persistent part of the 
perianth becomes fleshy, as in 
Neea. 
du’plicate Par’asitism,self-parasitism, 
as in the case of mistleto upon 
mistleto. 
Dy’ad, a subdivision of a TerRaD by 
mitosis, again dividing into single 
elements (Calkins). 
dyspho’tic, dysphotis’tic (@us, gwros, 
light), applied by A. F. W. 
Schimper to the deeper situated 
BrentHos; ~ Plants, are those 
which are adapted to a minimum 
of light; dyst’ropous (7por, a 
turning), injurious insect-visiting, 
as far as the flowers are concerned ; 
Dys’tropy, the condition described. 
ecil‘iate (+ CrL1um), without cilia ; 
eflagellifferous (+ FLAGELLUM, 
JSero, I bear), destitute of flagella. 
Ec'topy (éxrémios, displaced), the 
abnormal position of an organ. 
edaph’ic (&dagos, the ground), 
A. F. W. Schimper’s term for the 
influence of the soil on the plants 
growing upon it. 
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