Diplobacillus 
Discopodium 
Diplobacill’us (dirddos, twofold, + 
Bacruuos), bacilli which are com- 
posed of two cells, or adhere in 
pairs; Diplobacte’ria ( = DrpLo- 
BACILLUS) ; diplocaulese’ens (caules- 
cens, stem-producng), having axes 
of the second order; Diplococ’cus 
(+Coccus), a coupled spherule or 
result of the conjugation of two 
cells; diplochlamyd’eous (xAaus, 
a cloak) = dichlamydeous ; having 
a double perianth. 
Dip’loé (Si7A07, doubling), Link’s term 
for MESOPHYLL. 
Diplogen’esis (dirdéos, twofold, yéveats, 
a beginning), doubling of parts 
normally single; Diploperisto’mi 
(+Perristoma), with double peris- 
tome, applied to Mosses ; diploste’- 
monous (oTjwy, a stamen), with 
stamens in two whorls, those of the 
outer whorl alternating with the 
petals, the inner whorl alternating 
with the last; Diploste’mony, 
stamens as just described ; diplos’- 
tic, Van Tieghem’s term for root- 
lets when the mother-root has 
only two xylem bundles; Diplo- 
te’gia, -gis, -giwm (réyos, a covering), 
a capsule or other dry fruit, in- 
vested with an adnate calyx; an 
inferior capsule ; diploxyl’ic (vdov, 
wood), used of vascular bundles in 
which the centrifugal part of the 
wood is secondary. 
Dip’tero-cecid’ia (dis, two, mrepov, a 
wing, xnyxis, a gall), galls produced 
by dipterous flies; dip’terous,-us, 
two-winged, having two wing-like 
processes ; dipyre’nus (rupiv, fruit- 
stone), containing two stones. 
Direc’tion Cells, ~ Corpus’cles, syn- 
onyms of Potar CELLS ; 
Direct’/-Metamorph’osis, the same as 
ProcREssivE METAMORPHOSIS; ~ 
Superposition, the situation of 
accessory buds in an axil above the 
leading bud or that first formed 
(Crozier); direc’te - veno’sus, a 
feather-veined leaf, where second- 
ary ribs (primary veins) pass direct 
from mid-rib to margin, digitiner- 
vius; direct/ing Leu’cite, = T1no- 
79 
Direm’ption, 
LEUCITE ; direct‘ive Spheres, = AtT- 
TRACTIVE SPHERES. 
Diremptio (Lat., a 
separation), the occasional separa- 
tion or displacement of leaves. 
diri’noid, resembling the apothecium 
of the genus Dirina. 
disappear’ing, branching in extreme. 
disartic'ulate (dis, apart, articulus, a 
joint), to separate at a joint, as the 
leaves in autumn. 
Disc, or Disk (disc’us, a quoit), (1) 
development of the torus with- 
in the calyx or within the cor- 
olla and stamens ; (2) the central 
part of a capitulum in Compositae 
as opposed to the Ray; (3) the 
face of any organ, in contradis- 
tinction to the margin; (4) certain 
markings in cell-walls, of circular 
outline; bordered pits; (5) the 
valves of diatoms when circular ; (6) 
the base of a pollinium;—adhe’sive 
~, modified tendrils, as in Vitis 
heterophylla, Thunb., Lrcilla, ete. ; 
dis’cifer (Lat.), discife’rous (fero, I 
bear), disc-bearing, as the wood of 
conifers; dis'ciform, disctform’is 
(forma, shape), flat and circular, or- 
bicular ; discig’erous (gero, I bear), 
disc-bearing ; ~ Frus’tules, in Dia- 
toms those having valves more or 
less circular in outline ; Dis’cocarp 
(xapmos, fruit), an ascocarp in which 
the hymenium lies exposed whilst 
the asci are maturing ; an apothe- 
cium ; Discocarp’ium, a collection 
of fruits within a hollow receptacle, 
as in many Rosaceae. 
disc’oid discoi'deus (dicxos, a quoit, 
eldos, like), with a round thickened 
lamina, and rounded margins; ~ 
Flow’ers, those belonging to the 
disk, usually tubular florets; ~ 
Marking, see Disc, 5; disco’idal, 
discoida'lis, orbicular; Discoli’- 
chenes (+ Lichenes), Wainio’s term 
for Discomycetous LicHENS, 
dis’color (Lat. of different colours), 
used when the two surfaces of a 
leaf are unlike in colour. 
Discopod’ium (dicxos, « quoit, sods, 
mo60s, a foot), a disc-shaped floral 
