488 
THE DICTIONARY OF GARDENING, 
Doryanthes—continued. 
the handle of a spear, bearing flowers on the top). Овр. 
Amaryllidacee. A genus of extremely beautiful ama- 
ryllids, requiring greenhouse culture, similar to Dasylirion, 
Fowrceroya, &c. They thrive best in a compost of loam 
and leaf soil, in equal parts. Propagated from suckers, 
which should be placed in small pots, and grown on, 
repotting into larger sizes. as becomes necessary. А 
considerable size of plant has to be attained before 
flowers are produced. 2 
D. excelsa (tall.* /. very brilliant scarlet, each as large as the 
common ite An disposed in a globose head at the top of 
** the bracteate the base of which is surrounded by leaves. 
. Summer. /. numerous, long, h. 8ft. to 16ft. New 
‘South Wales, Fig. 678. (В. М. 1 
D. Palmeri (Palmer’s).* fl. red, with the centre lighter e, 
fannel-shaped ; spik пузам lft. to 1}ft. high, pos е, 
12in. broad, i iy Phe ~ clothed with leafy bracts. l in а 
dense tuft, b 
-lanceolate, each — б, long by 6in. in 
breadth, gracefully arching. A. 8ft. to 1 Queensland, 1 
This is а very handsome species. (B. M. МЫС. 
DORYCNIUM (the old Greek name of a species 
TE. Convolvulus, from йоту, a spear). Including Bon- 
ORD. Leguminosc. А. genus of abont half-a-dozen 
species of elegant hardy herbs or sub-shrubs. Flowers 
eapitate or sub-umbellate, usually numerous. Leaves 
trifoliate, with the stipules in the form of the leaflets. 
All are of the easiest culture in rather dry soil, and are 
readily increased by seeds. 
D. herbaceum (herbaceous). fi. white ; heads on 1 neles. 
July. Z., leaflets and sti stipules borate, à obtuse. "Dies i certae 
erect. А. 1}ft. South агора, 
rco MICA Pe or pale red, large; heads 
many-flowered. July. 'L sessile; Е моск от 
obovate. Stem erect, suffruticose, h. lft. to 2ft. South Euro 
1683. Plant clothed with м 
КА roots} hoary tomentum, (B. M. 336, ux 
D. latifolium (broad-leaved). Л, white ; paso man 
Re bracteate towards the a June. 1, sessile ; leaflets 
stipules obovate and mucronu 
i X Te zit. East Europe, 1818. Plant Pe i s sub-shrubby. 
DIU nre rectum (upright). 
cp сес Sie i дое —Q peduncles bract- 
bovate, mu- 
M "en erect, inei 
Plant villous. A BL South Europe, 1600 
- DORYOPTERIS. Included under Pteris. 
| —  QOSSINIA (named in honour of E. P. Dossin, a Bel- 
"giam Бошан). The only spe | this genus a аыл 
terrestrial orchid, nearly — to A Anectochilus, but 
differing in the boat-shaped process of the column, as 
| ue f the abonet, of ОРЫ Е the lower 
- part of the lip. 
D. marmorata (marbled)* is qae AUTE name 
described in iuo ven Di E Anectochilug of the 
таз o eetehi | 
Syn. Cheirostylis Au (F. 
epithet Double is applied to flo 
structural conformation. The most 
rendering a flower Double, in the ал 
1e term, are substitutions of petals or 
for stamens and pistils, one or both. 
common mode of Doubling is brought 
much more value, from a purely horticultural st 
than single ones. The protective floral 
corolla—frequently wither quickly after 
\ ‘reproduction have been metamorphosed into 
р в, they remain, as a rule, in full beauty а 
Miime. The predisposing causes of Donbling 
ry different ie various plants. In some, it may 
a process po^ "^ star 
D. suffruticosum ( E еа 4 
keel; heads of flowers i perm 
_ and ‘stipules dcr acute. dur h. 2ft. 
to 3ft. South MSN S. ique Siom айтары. 7 of Lotus 
Pier ar ^ 
whilst in those flowers in which the 
s of nutrition; in others, by- 
aue 
Double Flowers—continued. 
tendency for the flowers to become Double under culti- 
vation. Single-flowered plants have been imported which, 
in a few years, have altogether ceased to produce single 
flowers. For a very exhaustive account of the various 
kinds of Doubling, and their morphological significance, 
the reader is referred to one of the Ray Society's publi- 
cations, “Vegetable Teratology,” by Dr. M. T. Masters. 
The means adopted by some successful growers to obtain 
Double Stocks will be described under Stocks. 
DOUBLY-SERRATED. Twice serrated. 
DOUGLASIA (named in honour of D. Douglas, a 
very zealous botanist and collector in North-west America; 
he came to an untimely end in the Sandwich Islands). 
ORD. Primulacee. A genus of four species of little hardy 
evergreen plants, allied to Androsace. They form admir- 
able subjects for alpine situations. A compost of peat 
and loam is the best soil for them. Propagated by 
seeds. In Europe, the genus is represented by D. Vi- 
taliana, already mentioned in this work under its more 
generally accepted name, Androsace Vitaliana. The other 
three species belong to Arctic North America: 
D. nivalis (snowy).* jt иш, sub-umbellate, on long peduncles. 
April ¿. linear, orte sub-amplexicaul, closely hairy. Branches 
a Ero xd sub-verticillate. h. 5іп. Rocky Mountains, 1827 
DOUM fixi See Hyphene thebaica. 
DOVE FLOWER. See Peristeria elata. 
DOWN. A term applied to soft, short hairs, like 
down. 
DOWNINGIA (named in honour of A. J. Downing, 
a promoter of horticulture). Syn. Clintonia, under which 
generic name the two species below-mentioned are gene- 
rally included, but erroneously so. ORD. Campanulacea. 
Very ornamental annuals. Flowers bilabiate. Leaves small; 
linear-lanceolate. They are used with great effect in 
summer flower-gardening, and but little care is necessary 
to insure success, Seeds should be sown in a spent hot- 
bed, in March, thinned out, so as to give the plants room, 
and kept growing till May, when they may be transferred 
to the open border. D. ааа. is especially pretty for 
hanging baskets. 
D. rere (беру Л. pie ад к 
б white streak on the 
мал, eso ка, ummer. pe dead 
veined. Пагу, enr west America, 1827. (В. R. AL) 
rich blue, with yellowish 
D. pulchella (fair.* Л. et yell eyes ; I 
ts of corolla ovate, 
Кан. S 34 i ‘California, 4 
pulchella. (B. R. ^ 
DRABA (Greek name used by Dioscorides, from drabe, 
acrid; referring to the taste of the leaves). Whitlow 
Grass. Including Petrocallis. ORD. Crucifere. More 
than 150 species have been described; but it is probable 
that not more than half that number are really distinct. 
Perennial or annual branched herbs, which are some- 
times tufted, sometimes elongated, smooth or pilose, or 
usually velvety from soft branched hairs. Flowers white 
or golden, rarely pink or purple; racemes terminal; 
pedicels filiform, bractless. Leaves linear, oblong or 
ovate, entire or toothed, 
= Amongst the spring - flowéring alpines," says Mr. 
Robinson, “the genus Draba must always take an im- 
portant position. In addition to the brilliant golden 
colour of the flowers of one section of the genus, the 
plants are characterised by а dwarf compact habit, and by 
. much neatness in the arrangement of the bristly ciliated 
hairs, which not unfrequently become bifureate; thus 
the attractive appearance in the matter of colour is 
enhanced, on a closer inspection, by the beauty of form 
апа detail. In another section, we find white to be the 
‘predominant colour ; and though in many cases the flowers 
are small, still, Te een rate ap a жек ш ые 
нш йыйды contrasted with the dark grean leaves, - 
