discous 
Divergence 
receptacle ; disc’ous, the same as 
discoid (Crozier). 
discrete’, discre'tus (Lat., parted), 
separate, not coalescent. 
Dise’us (Lat. from dickos), see Diso; 
Dise‘ulus (dim. of Dzscus), the 
adventitious lobule of Hepaticae 
(Spruce); dise’al, word used by 
J. Smith to express ‘‘on the 
surface of the frond, superficial.” 
disep’alous, -us (dls, two+SEPALUM), 
of two sepals. 
Disjunc’tion (disjunctio, separation) 
see DiaLysis, Fission, SoLurion, 
varying degrees of separation in 
organs; Disjune’tor, Woronin’s 
term for a spindle-shaped cellulose 
connection between the gonidia in 
certain Fungi; the developed sep- 
tum, as in Sclerotinia Vaccinii, 
Woron. 
Disk, see Disc. Disk is the more 
usual spelling in the case of Com- 
positae, as ~ Flor’ets, ~ Flow’ers, 
those occurring on the central 
portion of the capitulum of com- 
positae, not of the ray (or margin) ; 
~ shaped = DISCOID. 
Disloca'tion (dis, apart, Jocus, a place) 
= DIsPLAcEMENT; disoperc’ulate 
(operculum, a lid), deprived of the 
cover or lid. 
disperm’ous (dls, double, omdpua, a 
seed), two-seeded, 
Dispersal, Dispers’ion (dispersus, 
scattered), the various ways by 
which seeds are scattered, by 
wind, birds, adhesion to animals, 
ete.; inGerm., Verbreitungsmittel. 
Dispi‘rem (dls, two, + Srirem) a 
stage in nuclear division, as in 
Psilotum triquetrum, Sw. which 
follows the Dyaster (Rosen). 
dispi’rous (d's, double, oezpa, a coil), 
Spruce’s term forthe elatersof Hepa- 
ticae which have double spirals. 
Displa’cement, the abnormal situa- 
tion of an organ; diremption. 
Disposit’io (Lat., arrangement), the 
manner in which parts are ar- 
ranged, as “disp. $” indicates 
that phyllotactic system. 
issect’ed, dissect’us (Lat., cut up), 
80 
deeply divided, or cut into many 
segments. 
Dissemina’tion (disseminatio, sowing), 
the contrivances by which ripe 
seeds are shed by the parent plant ; 
in Germ., Aussaet. 
Dissep'iment, Dissepiment’um (Lat., 
@ partition), a partition inan ovary 
or pericarp, caused by the ad- 
hesion of the sides of carpellary 
leaves ; spurious ~, a partition not 
having that origin. 
dissil’ient, dissil’iens (Lat., flying 
apart), bursting asunder. 
dissim’ilar (dissimilis, unlike), when 
similar organs assume different 
forms in the same individual, as 
the anthers of Cassia. 
Dissocia’tion (dissociatio, separation), 
separation. 
dist’ad = dis’tal (disto, Istand apart), 
remote from the place of attach- 
ment; the converse of proximal; 
dist/ant, distans, when similar parts 
are not closely aggregated, in 
opposition to approximate. 
Disten’sion (distensus, stretched out), 
swollen or bulging. 
Disteleol’ogy, defined by Haeckel as 
purposelessness ; for botanic usage 
see DYSTELEOLOGY. 
dist’ichous, -ws (dlorexos, of two rows), 
disposed in two vertical ranks, as 
the florets in many grasses. 
dist/inct, distinct’us (iat. separate), 
separate from, not united. 
distrac’tile, distracti’lis (distractus, 
pulled two ways), borne widely 
apart, as the anther-lobes in 
Salvia. 
dithe’cal (dls, two, On, a case), 
dithe’cous, dithe’cus, of two cells, 
as most anthers; ditrichot’omous 
(rpix7, threefold, réun, a cutting), 
doubly or trebly divided. 
diur’nal, diur’nus (Lat., daily), oc- 
curring in the day-time, sometimes 
used for ephemeral; ~ Sleep, = 
PARAHELIOTROPISM, 
divar'icate, divarica’tus (Lat., spread 
asunder), extremely divergent. 
Diverg’ence (divergiwm, turning in 
different directions), used when 
