72 
Di'dyjius — D ouble or twin. (See the fruit 
ot Hanthkra the weed known 
as Wart Cress.) 
Didyna'mus — W here the stamens are four 
and arranged thus — two longer than 
the other two. 
DiFFLu'ENT~R(’adily dissolving. 
Diffor'jiiS'— H aving an unusual shape, as 
Ciri'mis d 
Diffract' — B roken into distinct areolfe, 
sspai ated by chinks. 
Diffuse' — S preading widely, horizontally, 
and irregularly. ( See i»or’ W7Y/YTC77'ir diffnso..) 
Digitate', 1>igita'tc.s— A i>plied to a 
simple leaf, where the lobes are very 
narrow, deeply cut, and all extend 
neaj'ly to the base of the limb, imitating 
the hngers of the Immau hand. (See 
the inriorescence (»f Couch-grass.) 
Digy'nus— P ossessing two distinct pistils, 
or a pistil with two distinct styles ; or 
with two distinct stigmas. 
Dila'ted, Dilata'tus— E xpanding into a 
lamina. 
DiME'KOUSi and 11<I • TETRA - PEN’TA - TO 
POLYMEEors, signifies that the flowers 
are symmetrical, and have2,3, 4, 5, or an 
indefinite number of pai'ts in each 
whorl. 
Dijiid'iate, Dimipia'tus — H alved, where 
partial imperfection seems to exi-st, as 
in a stamen whose anther has only one 
lobe; a leaf or leaflet w’hose limb is 
fully developed on one side of the mid- 
rib," and scarcely ax all on the other. 
(See the pinnules of many Adiantums.) 
DiiiOR'riiors, DiMOii’Piirf)— Where similar 
l-jarts of the same plant assume different 
shapes, as LindnC'’ dha<frpha. 
Dke'cious, Diotcouft (from the Greek, 
dis twice, and oikoa a house) — Bearing 
the male and foinah* flowers on distinct 
xdants, as the iiate Pain?, Phanix 
dactijUfira, 
DiPLO'TEGIS, DIPLO'TECTA, DirLO'YEGirM — 
A dry fruit, formed as the capsule, 
but from l)eing ‘Mnferiov” is also 
invested by the persistent calyx. Por 
exj>m]?le, fruit of LohdvA» the Tea-tree 
{Lijilot^permuiii), KucatyptU!^, &c. 
Dioica— D icecious, ;*k Phytolucca dioica, 
the Bella Sombs a tree. 
Dip'teiiol's, Dii''teru.- 5 — Having two mem- 
branous expansions termed wings. 
Disciflo'r-e (2nd Series of Pnlypetals)— 
Torus usually thickened or expanded 
into a disk, either free or adnato to the 
ovary, or to tue calyx, or to both, 
rarely reduced to glands, or wanting. 
Stamens as many, or twice ns many, 
as petals, an fewer. Ovary superior or 
partially iiiiiner.''ed in the disk, divided 
into cefls with axile jdaceutas, or the 
carpels distinct. (Stamen-s indefinite in 
a very fcv.^ exceptional species. Ovary 
inferior or enclo.«.ed in the calyx-tube 
in most Rbauiueie; l-celled in some 
Olacinese.) 
Discoid', Dtscoi'dal — A round somewhat 
thickeneil lamina, the mai’ginsof which 
are also rounded. Also used to designate 
a large spot of colour surrounded by A 
some other colour. (See the seeds of 
J^UX-l'07iilCa.) H 
Disk or Disc, from Dis'cu.s, a quoits ■ 
Certain fleshy ex|5acsions between the S 
stamens and pistil ; an enlargement of H 
the receptacle which* occur in some II 
flowers. The usual forms cui>-lik6 M 
(cupular), or flat like a quoit, or V 
cushion-like (pulvinate). It may be H 
entire, toothed or lobed, or divided llj 
into quite separate jiarts, when these l|| 
parts are often speken of as glands. ||j 
DissEc''rus — ^^Tlere the segments, as in | 
some leaves, are very numerous, and J 
deeply cut, as in Gernnciim dissectmi. I ■ 
Dissep'ijiexts — T he ])artitions of an ovary I 
or fruit. ’ 
Dissi'uiKNa — Pursting asunder v.dth elas- 
ticity, as some sccd-vc.^sels, particu- | 
larly thos*^ of the J'hiphurbiacese. , 
Dissiir'icAR— Unlike, when similar organs 
assume different forms in the same i 
individual, like the anther of | 
Dis'tiohous, Dis'rirHcs— Arranged in two | 
rows, on opposite sides of a common i 
axis. (See the loaves upon the branch- 
lets of the Bald Cyprus, Taxodiim 
distichiLin,) 
Distrac'tilis (Dirtraclus, drawn asunder) 
— Applied to the connective, when it is 
so much enlarged as to keep the lobe5 I 
of the anther wide apart, as in the I 
genus Salvia. I 
Dicret'ic — Fluiits having the_ power o I 
promoting an increa'^ed discharge of 1 
urine, as Dandeliim, Parsley, &c. I 
Diue'xus— The term is given to flowers I 
which enilure but for one day. I 
Diva'ricate — Spreading irregularly in I 
various directions, as Stur-gnws, Chloris R 
divm'icAtlui^. 11 
Diyero'ing, Divergek?v — when similar I* 
jiarts, aiiproximatiug at their bases, I 
incline away^ from each other towards I 
their extrcniiticfi. • 
DiVfiKSiFO'LiUR — Having leaves of two or 
mo! e .‘ihaj>es. ■ 
Dodec.a'gyxous — Provided with twelve ' 
styles or stigmas. 
Dodkcak'drous — Provided with twelve 
stamens. 
Dodra'.ns, a span ; of .about nine inches. 
Dola'briforji, Dolabra'tus, Dolabri- 
for'mis — A xe-shaped . 
Dor'sal — On the back. DoRSUii — The 
back.— DoRSiFERUa — Where the fructi- 
fication is borne upon the hock a.s in a 
large number of ferns. 
DRAfcTic— Applied to medicines wdiich act I 
violently. _ 1 
Drupa'ceocs, Drupa'crus— Either having ' 
the character of a dru}je, or resembling 
one in outward appearance. 
Drupe, Deu'pa — A fruit in winch the 
jjericarp, when ripe, con.-iists of two 
distinct portions — an outer succulent 
one called the Sarcocarp (covered like 
the berry by a .skin or ejiicavp), and an , 
inner dry endc^carp called the Kuta- I 
men, which is either cartilaginous (of \ 
