Bots 
dusty 
Dots (1) receptacles of oil in the 
leaves ; (2) pits in the cell-wall ; 
dotted, punctured with dots; ~ 
Ducts, vessels with pit-like mark- 
ings on the walls; ~ Tis’sue = 
BotHRENCHYMA. 
doub’le, du'plex (1) twice ; (2) used of 
flowers when the petals are mon- 
strously increased at the expense 
of other organs, especially the 
stamens ; ~ bearing, producing a 
crop twice in the same season; 
Doub'ling, the same as chorisis ; 
doub'ly, something repeated, as ~ 
toothed, the teeth themselves being 
toothed, 
Down (1) soft pubescence; (2) the 
pappus of such plants as thistles ; 
down’y, pubescent, with fine soft 
hairs. 
Dra’canth (draganthum, Mid. Lat.), 
a synonym of Gum Tragacanth. 
Draco’nine, a red resinous sub- 
stance from ‘‘Dragon’s Blood,” 
produced by Daemonorops Draco, 
Blume, and Dracaena Draco, 
Linn. 
drawn, applied to attenuated shoots, 
diminished and etiolated, often 
increased in length. 
drep’aniform (dpéravy, a sickle, 
forma, shape), falcate (Crozier) ; 
Drepa’nium, a sickle-shaped cyme. 
Drip-point, Drip-tip, the acuminate 
apex of a leaf, from whose point 
water soon drips; Germ. Traufel- 
spitze. 
droop’ing, inclining downwards, cer- 
nuous, but not quite pendent, 
Drop’per, the young bulb of a tulip, 
not of flowering size. 
Drop’ ping-point = Drip-PoINT. 
drupa’ceous(drupa,anolive, + aceous), 
resembling a DRUPE, possessing its 
character, or producing similar 
fruit; Drupe, Dru’pa, a stone-fruit 
such as a plum ;—Spw rious ~, any 
fleshy body enclosing a stone; 
Dru’pel, Dru’pelet, Drupe’ola, a 
diminutive drupe, the fruit of the 
Blackberry is an aggregation of 
these; Drupe’tum, a cluster of 
drupes; Dru’pose, a constituent of 
82 
the stone-cells of the flesh of pears 
(Cross and Bevan). 
Dry-rot, destruction of timber in 
houses by Merulius lacrymans, Fr. 
du’bious, du‘bius (Lat.), doubtful, 
used for plants whose structure or 
affinities are uncertain. 
Duct, Duct’us (Lat., led, conducted), 
an elongated cell or tubular vessel, 
especially occurring in the fibro- 
vascular portions of plants; an’- 
nular~, the secondary thickenings 
occurring more or less in the form 
of rings; closed ~, long cells, not 
continuous, but with the intervening 
septa remaining ; dot’ted ~ , = Botu- 
RENCHYMA ; intercel’lular ~, pas- 
sages between the cells; retic’u- 
lated~, where the markings seem 
to form a network ; scalar’iform ~ 
with ladder-like markings as in 
Ferns. 
dul’cis (Lat.), sweet, extended to any 
kind of taste which is not acrid; 
Dul'cite, a crystalline substance 
from Melampyrum, also found in 
Madagascar Manna. 
du’metose, dumeto’sus (dumetum, a 
thicket), bushy, relating to bushes ; 
Dume’tum, a thicket. 
dumose’ (dumo’sus, bushy), full of 
bushes, of shrubby aspect ; Du’mus 
(Lat.), a bush. 
duode’ni (Lat.), by twelves, growing 
by twelves. 
duplex (Lat.), double; du’plicate, 
duplica’tus, doubled or folded, 
twin ; Duplica’tion, doubling, CHorI- 
sis; duplica’to-crena’tus, doubly 
crenate ; denta'tus, doubly- 
toothed ; ~ pinna’tus, bipinnate ; ~ 
serra‘tus, doubly-serrate ;~ terna’- 
tus, biternate; duplo = twice as 
many, in Greek compounds it is 
diplo. 
Dura’men (Lat., a hardened vine 
branch), the heartwood of an exo- 
genous stem, which has become 
hardened by deposits. 
Dust, Blair’s word for Pollen; dust’y, 
covered with granulations re- 
sembling dust; or powdered, fari- 
nose, 
~ 
