Digitus 
diplo 
from the summit of the main 
petiole, straight ribbed; Dig’itus, 
a measure of about 3 inches in 
length, or 8 cm. ; digita’lis, a finger- 
length. 
dig’onous (dls, two, ywvia, an angle), 
two-angled, as the stems of some 
eacti (Crozier); Digyn’ia (yurh, a 
woman), a Linnean class, with a 
gynaecium of two pistils; digyn’ian, 
dig’ynous, with two separated styles 
or carpels. 
dilacera’‘tus ¢ (Lat.), torn asunder, 
lacerated. 
Dilamina’tion (dis, apart, lamina, a 
thin plate), the separation of a 
layer from a petal, like or unlike it 
in form ; chorisis. 
dila’ted, dila‘tus (Lat., widened), ex- 
panding into a blade, as though 
flattened, like the filaments of 
Ornithogalum. 
dilep’idus + (dis, two, Nels, emldos, 
scale), consisting of two scales. 
dilu’tus (Lat. thinned) of a pale tint. 
dimer’ic, dim’erous, -rus (dis, two, jepds, 
a share), with two members in each 
part or circle. 
dimid’iate, dimidia’tus (Lat., halved), 
(1) halved, as when half an organ 
is so much smaller than the other, 
as to seem wanting ; (2) used of the 
calyptra of Mosses when split on 
one side by the growth of the 
theca; dimidia’to-corda’tus, when 
the larger half of a dimidiate leaf 
is cordate, 
dimorph’ic, dimorph’ous (dls, twice, 
popdh, shape), occurring under two 
forms; Dimorph’ism, the state of 
presenting two forms, as long or 
short-styled flowers in the same 
species. 
dimo’tus (Lat., separated), somewhat 
remote from. 
Diodang’ium (dlodos, apassage, dyyelor, 
a vessel), Van Tieghem’s term for 
sporangium in Vascular Cryptogams 
and Bryophytes. 
Di‘ode (dlodos, a passage), Van Tieg- 
hem’s term for a reproductive body 
eculiar to vascular plants which 
tocelopi into a rudimentary body 
78 
or prothallium, the transition be- 
tween the rudimentary and adult 
stages; cf. Isopiopy, HErTERO- 
DIODY ; Di’odogone (-yov7, offspring), 
Van Tieghem’s term for a sporan- 
gium which produces diodes in 
Phanerogams, the embryo sac and 
pollen sac; Di/odophytes (gurdv, a 
plant), vascular plants (Van Tieg- 
hem). 
Dioe’cia (ds, two, olkos, a house), a Lin- 
nean class of plants with unisexual 
flowers; dioec’ian, dioec’ious, uni- 
sexual, the male and female ele- 
ments in different individuals; 
dioec’io-dimorph’ous, heterogonous; 
dioec’io - polyg’amous, when some 
individuals bear unisexual flowers, 
and others hermaphrodite ones; 
Dioec’ism, the condition of being 
dioecious ; dioi’cous, a spelling used 
by bryologists for DioEciovus, the 
male and female organs on separate 
plants. 
dioph’anus = DIAPHANOUS. 
Di‘osmose, Diosmo'sis (dd, through, 
&opos, a pushing), the transfusion 
of liquid through membrane. 
dipet/alous, -us (dls, two, méradov, a 
flower-leaf), having two petals; 
diphyll’ous, -ws (pvAAov, a leaf), 
having two leaves; diplanet‘ic 
(wAdvos, roaming), relating to Dr- 
PLANETISM ; Diplan’etism, double- 
swarming ; in certain genera allied 
to Saprolegnia the zoospores escape 
from their sporangium destitute of 
cilia, come to rest in a cluster each 
forming a cell-wall, and after some 
hours the protoplasmic contents of 
each spore escapes, acquires cilia 
and active movement. 
Diplecolo’beae (dls, twice, mAékw, I 
fold, AoBds, a lobe), 4 sub-order of 
Cruciferae, the incurved cotyledons 
being twice folded transversely ; 
Dipleurogen’esis (7)evpa, the side, 
‘yéveots, beginning), term used by 
L. H. Bailey for Bilaterality, as 
the type of animals; cf. Cenrro- 
GENESIS. 
diplo (d:rd0os, twofold), in composi- 
tion =duplo. 
