ENCYCLOPEDIA OF GARDENING. 
POT CULTURE: Compost, equal parts loam, leaf-mould & sand. 
Sow seeds 1-16 in. deep in 5 or 6 in. pots placed in temp. 55°, or in cold 
frame in April or May. Water moderately. Apply weak liquid manure 
when plants are in flower. Place plants when in flower in cool green- 
house or window. 2 
SPECIES CULTIVATED: D. elegans (Syn. Clintonia less). blue and white, 
summer, 6 in., N.W. America; pulchella (Syn. Clintonia pulchella), blue, white, and 
yellow, summer, 6 in., W. America. 
Down Thistle (Onopordon acanthium).—See Onopordon. 
Downton EIm (Ulmus glabra var. pendula).—See Ulmus. 
Draba (Whitlow Grass)—Ord. Crucifere. Hardy perennials. 
Pretty rockery plants, 
CULTURE: Soil, ordinary. Position, crevices in sunny rockeries, 
or on old walls. Plant, March or April. Propagate by seeds sown 
where plonts are to grow in April; division of roots in March. 
SPECIES CULTIVATED: D. aizoides, yellow, March, 3 in., Europe (Britain) ; 
Aizoon, yellow, April, 3 in., W. Europe; alpina, yellow, April, 3 in., N. Europe; 
Maevii, white, spring, 3 in., Spain; pyrenaica, lilac purple, fragrant, April, 3 m., 
S. Europe; rupestris, white, summer, 3 in., N. Europe. . 
Draczena (Dragon-plant; Dragon Blood-tree).— Ord. Liliaces. 
Stove evergreen plants. Orn. foliage. First introduced 1640. Leaves, 
variegated with various colours. 
CULTURE: Compost, two parts peat, one part loam & sand. Posi- 
tion, well-drained pots in stove or greenhouse. Pot, Feb. to March. 
Water moderately Oct. to March, freely afterwards. Temp., March 
to Sept. 75° to 85°; Sept. to March 55° to 65°. Propagate by seeds 
sown 1 in. deep in pots of light sandy soil in temp. 85° in March; cut- 
tings of main stems cut into lengths of 1 in. & partially buried hori- 
zontally in pots of sandy soil in March; cuttings of fleshy roots, inserted 
lin. deep in pots of sandy soil in temp. 75° to 80° in March or April; 
stem-rooting March or April; offsets inserted 2in. deep at any time. 
See also the genus Cordyline for so-called greenhouse dracenas. 
SPECIES CULTIVATED: D. concinna, leaves green, margined with red, 4 to 
6 ft., Mauritius; Draco (Dragon Tree), leaves glaucous, hardy in Cornwall and 
Scilly Isles, 40 to 50 ft., Canary Islands; fragrans, leaves green, 6 ft., Trop. 
Africa; fragrans Lindenii, leaves, yellow and green; fragrans massangeana, leaves, 
white and green; godseffiana, leaves white and green, 3 ft., Trop. Africa; goldieana, 
leaves, green and white, 4 to 6 ft., Trop. Africa; sanderiana, leaves, white and 
green, 5 ft., Trop. Africa. See also trade lists for varieties. 
Dracocephaium (Dragon’s-head; Moldavian Balm). — Ord. 
Labiatzw. Hardy annual & perennial herbs. First introduced 1596. 
CULTURE: Soil, light ordinary. Position, cool partially shady 
borders. Plant, Oct., Nov., March, or April. Propagate annual & 
perennial species by seeds sown 4 in. deep in light sandy soil outdoors 
u April; cuttings of young shoots inserted in light sandy soil under 
hand-light or in cold frame in April or May; division of roots in Oct., 
Nov., or March. 
ANNUAL SPECIES: D. canescens, lilac blue, Aug., 12 to 18 in., E. Europe; 
Moldavica (Moldavian Balm), blue, July and Aug., 12 to 18 in., E. Siberia. 
PERENNIAL SPECIES: D. austriacum, blue, summer, 12 to 18 in., Europe; 
grandiflorum, blue, summer, 6 to 9 in., Siberia; ruyschianum, purplish blue, June, 
12 to 18 in., Alps; speciosum, lilac, June, 18 in., Himalayas. 
Dracunculus (Dragon; Snake-plant).—Ord. Aroidesw. Hardy 
tuberous-rooted perennial. First introduced 1548. Leaves, flesh col- 
our mottled with black, resembling skin of snake. 
CULTURE: Soil, sandy. Position, well-drained sunny border. 
Plant tubers 3 in. deep in Oct. or Nov. Propagate by division of tubers 
in Oct. or March. 
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