330 
THE DICTIONARY OF GARDENING, 
Doucin Stocks—continued. 
finding more favour with nurserymen, The Donucin is 
increased by suckers or division as well as by-root-cuttings. 
Another excellent mode of propagation is to earth up the 
plant like Celery, and then cut it up, planting out the 
rooted pieces. 
DOUGLAS FIR BLIGHT (Sclerotinia Douglasic). 
Though the Donglas Fir is oftenest attacked, yet Welling- 
tonias and other Conifers, mostly in a young state, also 
suffer. On the Continent the disease is much more in 
evidence than here. The chief symptoms are the presence 
of a greyish mould and a withering of the young shoots. 
Towards the end of summer, Sclerotia, in the form of 
minute black spots, are formed on the dead shoots, and 
these bodies are responsible for carrying the fungas over 
the winter. Conidia are also found upon the fallen needles. 
Once the disease gets a hold, the trees had better be up- 
rooted and burned. As a preventive measure young stock 
in the seed-beds and nursery-beds should be sprayed with 
sulphide of potassium in spring. 
DOUGLASIA. One species of this genus is a native of 
Central Europe; the rest are North American. Flowers 
axillary or terminating the branchlets, solitary and sessile 
or pedicellate, sometimes fascicled or umbellate : calyx fiye- 
cleft to the middle ; corolla salver-shaped, the limb of five 
imbricated lobes. Leaves imbricated or clustered and 
spreading, entire. To the species described on p. 488, 
Vol. I., the following should be added: 
D. levigata (smooth).* jl. rose-pink, pedicellate, 4in. in dia- 
meter ; corolla-tube twice as long as the calyx, the lobes very 
broadly obovate ; involucral bracts four to six, 4in. long ; peduncle 
about lin. long, erect, two- to tive-flowered. Spring and autumn. 
1. rosulate, }in. to Zin. long, linear or oblong-lanceolate, acute 
orsub-acute. Alps of Oregon, 1886. Plant tufted. (B. M. 6996.) 
DOUMA. A synonym of Hyphene (which see). 
DOVEDALE MOSS. See Saxifraga hypnoidea. 
DRABA. The species of this genus are very broadly 
distributed over the cooler parts of the globe. To those 
described on p. 489, Vol. I., the following should be added : 
D. repens (creeping). /l. yellow, in loose racemes; petals obovater 
obtuse, twice as long as the calyx ; scape naked, nearly glabrous. 
June. J, alternate, covered with hairs; lower ones oval-lanceo- 
late or oblong: upper ones linear. Siberia, 1818. A creeping 
perennial, 
D. scabra trong: jl. yellow ; petals twice exceeding the calyx 
and stamens. J. linear-lanceolate, acute, glossy green. Juniper- 
like. Western Caucasus, 1897, A pretty rock-plant. 
DRACZNA. To the species described on pp. 490-1, 
Vol. I., the following should be added : 
D. bicolor (two-coloured).* l. white, tinged with red, ina dense, 
globose, terminal, shortly pedunculate spike; bracts brown; 
large. /. sub-contiguous, the upper ones slightly ascending, 
oblong, 4in. to 6in. long, 2in. to din. broad, deltoid-cuspidate at 
apex, narrowed into a petiole lin. to 3in. long; lower ones 
oblong-lanceolate, lft. to 1{ft. long, 4in. to Sin. broad. Trunk 
5ft. high. Fernando Po, &e. (B. M. 5248.) 
D. congesta (congested). A synonym of Cordyline stricta. 
D. Doucetii (Doucet’s). A form of Cordyline australis. 
D. ensifolia (ensate-leaved). A synonym of D. fruticosa. 
D.- floribunda (abundant-flowered). jl. greenish, cylindrical, 
above sin. long; panicle drooping, shortly pedunculate, 3ft. to 
4ft. long, made up of fifteen to twenty drooping racemes lft. or 
more long. J. fifty to sixty, crowded in a dense rosette, lorate, 
acuminate, 3ft. to 4ft. long, 3in. to 34in. broad. Trunk 6ft. to 
8ft. high. Native country unknown, (B. M. 6447.) 
D. fragrans Lindeni (Linden’s). /. recurved, deep green, with 
a broad, centrad, striped variegation of yellow and pale yellowish- 
green. 1887. 
D. f. Massangeana (Massange's). J. broadly lanceolate, 
acuminate, dark green, with a median, whitish stripe. 1993. 
This variety closely resembles D. f. Lindeni. (B. H. 1881, 16.) 
D, fruticosa (shrubby). #. white, jin. to lin. long, in an ample, 
terminal, deltoi anicle. 1. eighty to 100, sessile, narrow- 
linear, 1ft. to 14ft. long, lin. to 14in. broad, acute. Trunk tree- 
like, often branched. A. 10ft. Native country unknown, 1862. 
Syn. D. ensifolia (R. G. 1864, t. 451). 
D. Godseffiana (Godseft’s).* A prettily-variegated plant, having 
the general habit of D. sureulosa, but the spots on the leaves 
are ote bright creamy-yellow, 1893, (B. M. 7584; R. H. 1893, 
p. 3 
D. Hookeriana (Hooker's). jl. greenish, about lin. long ; bracts 
white, persistent ; racemes in an erect panicle lift. to 2ft. long. 
1. crowded towards the apex of the stem, sessile, ensiform, 2ft. to 
Dracena—continued. 
3ft. long, lin. to 14in. broad, tapering to a long point, pale green, 
witha whitish border. South Africa, Syn. Cordyline Rumphit 
(B. M. 4279). 
D. H. latifolia (broad-leaved). J. 2in. to 3in. broad in the 
middle, narrowed to the base. (Ref. B., t. 353.) 
D. marmorata (marbled). jl. greenish-white, less than lin. 
long ; panicle narrow, erect, 14ft. to 2ft. long. Spring. /. crowded, 
sessile, lanceolate, recurved, plicate, bright green, copiously 
marbled with white, 3ft. long, 4in. broad. Singapore, 1882. 
Allied to D. arborea. (B. M. 7078.) 
D. salicifolia (Willow-leaved). A synonym of D. rejlexa. 
D. Sanderiana (Sander’s).* /. narrow-lanceolate, sheathing at 
base, 6in, long, 14in. broad, elegantly curved, green, banded with 
white. Stem slender, branched at base. Western tropical 
Africa, 1892. A distinct and ornamental species. (G. C. 1893, 
xiii., p. 442, f. 65; J. H. xxvi., p. 389, f. 71.) 
D. sepiaria (ledge-loving). A form of Cordyline terminalis. 
D. stricta (erect). A synonym of Cordyline stricta. 
In addition to the above, the following garden forms may be 
enumerated: cristula, Laingti, mirabilis, Ponbellei (R. H, 1888, 
p. 530), Vhomsoniana. 
DRACZNOPSIS. 
see). 
DRACOCEPHALUM. To the species described on 
p. 491, Vol. I., the following should be added. A few plants 
formerly classed hereunder are now referred to Cedronella, 
Lallemantia, and Physostegia. 
D. chamzdryoides (Chamedrys-like). 
campanulata. 
D. imberbe (beardless). _/., corolla lilac-blue, lin. long, the lips 
nearly equal; bracts cuneate, cut, glabrous. /., radical ones long- 
petiolate; cauline ones few, shortly petiolate, all reniform, deepl 
crenate. Floriferous branches erect. . 6in. Siberia, 1 
(R. G. 1080, f. 4-5.) 
DRACONTIUM. Bentham and Hooker include here- 
under Hehidnium (kept distinct on pp. 498-9, Vol. I.) and 
Godwinia. To the species described on pp. 491-2, Vol. L., 
the following should be added : 
D. foecundum (fertile). fe spathe dull brown outside, dark 
vinous-purple within, Sin. high, erect, narrowly cylindric-oblong ; 
elas bluish-brown, 1fin. high, sub-sessile, erect, cylindric, | 
obtuse. March, 7. solitary, produced after the flower, 4ft. to 5ft. 
in diameter, horizontal, tripartite, each segment bearing several 
pas of drooping leaflets ; petiole 6ft. high. Tubers surrounded 
by a profusion of acute bulbils, rising above the ground, British 
Guiana, 1880. (B. M. 6808.) 
D. spinosum (spiny). A synonym of Lasia heterophylla. 
DRAGONFLIES (Odonata). Very beautiful insects, 
varying greatly in size and colouring, but usually brilliant. 
As perfect insects they ‘‘hawk’”’ for their prey upon the 
wing, and the larger species, at any rate, render good 
service to the gardener by destroying many objectionable 
Moths and Butterflies. Though usually found near water— 
lakes, ponds, rivers, &c.—the larger Dragonflies venture 
long distances therefrom. So swift are they upon the wing 
that their movements are not readily noted when they are 
food-foraging. Indeed, it is not until we see the cast-off 
wings, maybe, of a captured Butterfly as they descend that 
we realise what has happened. The indigestible portions of 
the prey are apparently dropped by the Dragonfly. It is 
only in the perfect insect stage that Dragonflies are usually 
seen ; the remainder of their lives is passed in the water. 
DRAGON, GREEN. See Arum Dracontium (the 
correct name of which is now Arisema Dracontium). 
DRAKA. Syn. Arthrochilus. The species of this 
genus are rarely met with in cultivation. 
DRAPERIA (named in hononr of Professor John 
William Draper, of New York, chemist and _ historian), 
Orv. Hydrophyllacee. A monotypic genus. The species 
is a low and diffuse or decumbent, half-hardy, silky-hairy, 
perennial herb, branching from a slightly woody base, 
allied to Phacelia, It thrives in ordinary goil, in a shady 
position, with protection in winter, and may be increased 
by divisions, a 
Included under Cordyline (which 
A synonym of Sphacele 
D. systyla (columned). fl. crowded in a pedunculate, terminal 
cyme ; corolla bright violet, 4in. to sin. long; spikes or racemes 
unilateral. J. all opposite, ovate, entire, pinnately veined; 
petioles slender, California, 1896. 
DRAPIEZA. A synonym of Disporum (which see). 
