DOG-TOOTH VIOLET. 
ward, and roots downward from 
its base, every plant may be divided 
into as many new plants as it has 
buds ; but the common application 
of the term division is to the dividing 
of those roots which send up many 
stems or suckers. 
DoppEr.—See Cuscu'ra. 
Dopeca‘TtHEON.—Primulacee. — 
The American Cowslip. <A very 
pretty plant, to which Linneus gave 
a very strange name; Dodecatheon 
signifying the twelve Roman divini- 
ties. The plant is a native of Vir- 
ginia, and it is generally considered 
quite hardy ; but it is very difficult 
to keep. It should be grown in the 
open ground, in a sandy loam, in 
rather a shady situation, and kept 
moist. One reason of its being lost 
is, that if the roots are once suffered 
to become too dry, they wither ; and 
when moisture is given, they rot 
instead of reviving; and another 
reason is, that as the stem and leaves 
die away in winter, the root is often 
dug up and thrown away as dead, 
by jobbing gardeners, who are unac- 
quainted with the plants of the gar- 
den they are working in. To prevent 
this, a mark of some kind should 
always be fixed in the ground in 
small gardens ; or when a new gar- 
dener isemployed, its situation should 
be pointed out to him. ‘There are 
several garden varieties. 
Dog-toorn VioLet. — Erythro- 
nium dens canis is a pretty bulbous- 
rooted plant with spotted leaves and 
purple flowers. ‘There is a variety 
with white flowers ; and E. ameri- 
cana has large dark yellow flowers. 
The European kinds will grow in 
any common garden soil, and do 
not require taking up; but the 
American species, which is much 
the handsomest, is apt to wasiv its 
strength in producing roots instead 
of flowers. For this reason, it does 
best grown in well-drained pots, in 
rather poor soil, or what is better, in 
sandy peat. 
191 
DORYCNIUM. 
Doc-woop.—See Co rnus. 
Do'ticnos.—Leguminose.—Climb- 
ing annual and perennial plants, 
from the East and West Indies, 
generally with purple ar yellow pea- 
flowers.. The pods and seeds are 
eatable, and in some cases also the 
roots. Soy is made from the seeds 
of one of the East India species. 
They are generally grown ina stove; 
but most of the kinds will thrive in 
greenhouse heat, particularly if 
planted in the free ground in a con- 
servatory, and trained up a pillar, 
or over trellis-work. The soil for 
all the species should be sandy loam. 
D. Lablab, L. (Lablavia vulgaris, 
D. Don,) the Egyptian Bean, has 
splendid dark purple flowers, and 
will grow well in the open air, if 
treated as a half-hardy annual. 
Doro’nicum.— Composite.—Leo- 
pard’s Bane. Showy perennial 
plants, with large dark yellow flow- 
ers, which look very well in a border, 
and which will grow with scarcely 
any care in any common garden soil. 
One species, a native of Siberia, has 
white flowers. 
Dorrma’nnta.—-Lobelidcee.—-Pro- 
fessor De Candolle’s new name for 
the common British species of Lo- 
belia. It is an aquatic plant, and is 
generally found in pends, or small 
lakes. ‘There is an American spe- 
cies of the same habits, and both 
have blue flowers. 
Dorya'ntues.—-Amaryllidadcee.—- 
D. excélsa, the only species known, 
is a splendid Australian plant, send- 
ing up a flower-stalk twenty or 
thirty feet high, crowned with a head 
of bright scarlet flowers. The plant 
is herbaceous, and it requires a peaty 
soil and greenhouse heat. It dies as 
soon as it has produced its flowers. 
Dory'cntum. — Leguminodse.——A 
genus of little hardy plants, sepa- 
rated by Tournefort from the Lotus, 
or Bird’s-foot 'Trefoil, and growing 
freely in any common soil. They 
are most suitable for rockwork. 
