bail 
1900 SUPPLEMENT—RECENT INTRODUCTIONS, &C. 299 
Dahlia—continued. 
BEATRICE, pale rose, very fine; BEATRICE MARTIN, white, 
tinged rose, fine for cutting; COUNTESS OF LONSDALR, 
purplish-rose, tinged orange, of good habit; Esony, blackish- 
maroon, tinted with purple; F. C. PAWLE, rich crimson, tinted 
with rose, bushy; GREE WHITE, pure white, bushy habit ; 
ISLAND QUEEN, mauve; K Ss’ WHITE, the best white in 
cultivation ; LAVERSTOCK BEAUTY, vermilion, shading to reddish- 
yellow ; LEONORA, bright pink, tinged rose ; LOADSTONE, bright 
orange-red; Lucius, orange-red; MAGNIFICENT, orange-buff, 
shaded rose; Mary SERVICE, shades of heliotrope, pink, 
and yellow, dwarf; Miss Fincu (Fig. 313), carmine, flushed 
crimson and purple; MRs. FINDLAY CAMPBELL, orange- 
scarlet, of excellent form; MRS. HALFORD, rosy-scarlet ; 
Fic 314. FLOWER oF Cactus DAHLIA MRS. JOHN GODDARD. 
Mrs. JOHN GODDARD (Fig. 314); Maks. STEPHENSON CLARKE, 
yellow, tipped and flushed orange-scarlet ; PROGENITOR, glowing 
scarlet, suffused purple; RANJI, deep maroon; RED ROVER, 
deep crimson ; STARFISH, orange-scarlet, sturdy ; SYLPH, orange, 
handsome ; THE CLOWN, deep orange, tipped with white ; UNCLE 
Tom, deep maroon; VISCOUNTESS SHERBROOKE, reddish-terra- 
cotta, with apricot yellow tinge. vil 
DAHLIA (of Thunberg). A synonym of Tricho- 
cladus (which see). 
DALBERGIA. According to the authors of the 
“Genera Plantarum,” this includes Amerimnon. 
DALEA (of Gertner), A synonym of Microdon 
(which see)... 
DALIBARDA. Bentham and Hooker include this 
genus under Rubus, and the correct name of D. repens is 
Rubus Dalibarda. 
DALRYMPLEA. A synonym of Turpinia (which 
see). 
DAMASONIUM (from damein, to conquer; applica- 
tion rather obscure). Syn. Actinocarpus (ander which name 
the genus is described on p. 21, Vol. I.). About four species 
of annual or perennial, stemless herbs are referred here by 
the authors of the ‘‘ Genera Plantarum” ; two are found in 
Europe, North Africa, and Western Asia, a third in Aus- 
tralia, and a fourth in California. Flowers white, disposed 
Damasonium—continwed. 
in ample, branched racemes or panicles, hermaphrodite ; 
perianth leaflets six, in two series, the three inner ones 
slender, membranous, and persistent, the outer ones petal- 
like and deciduous. Leaves all radical, petiolate, ovate, 
oblong, cordate, or lanceolate, with a prominent midrib. 
D. australe (Southern). The correct name of Actinocarpus 
minor. 
D. stellatum (star-like). The correct name of Actinocarpus 
Damasonium. 
DAMASONIUM (of Schreber). 
Ottelia (which see). 
DAMNACANTHUS. Syn. Bawnannia. The species 
of this genus are natives of China, Japan, and the 
mountains of Eastern Bengal. Flowers white, small, 
axillary, solitary or in pairs. Frnit red, pea-like. Leaves 
small, sub-sessile, ovate, acuminate. To the species 
described on p. 489, Vol. I., the following should be added: 
D. indicus (Indian). i. tubular; corolla tube jin. long, the 
segments jin. long. Spring. jr. 8in. in diameter, borne while 
the plant is flowering. 7. opposite, shining green, sin. or more 
in length. Branches slender, with needle-like spines. Japan, 
oie, eee An ornamental, greenhouse or hardy, evergreen 
shrub. 
DAMPING OFF. A disease of seedling plants due to 
the attacks of a fungus (Pythiwm de baryanum). Prof. 
Marshall Ward characterises it as ‘‘one of the commonest 
of all maladies found in gardens, occurring in the seed-beds 
of all kinds of plants in very wet weather, or when the 
beds are kept too shaded or the seeds haye been sown 
too thickly and kept too moist.’’ At the onset of the 
attack only a portion of the seedlings appear to be 
attacked, but gradually the whole of them in seed-bed or 
seed-pan are involved, and are covered by a white thread-like 
mycelium. The first symptom that anything is wrong is a 
characteristic paleness and toppling over of some of the 
plants, which are attacked just above the soil-line. Such 
seedlings should at once be removed and burned. As a 
further preventive measure the same quarters should not be 
used for seedlings the next season, as the disease is kept 
alive through winter by means of oospores. Cruciferous plants 
are very liable to suffer from the disease. 
DAMSON MITE (Bryobia pruni). A destructive and 
prolific species of the family Tetranychidx, found, as its 
common name suggests, upon the Damson. This pest has 
only been noted within recent years, though doubtless its 
depredations in the past have been put down to Red Spider, 
which it somewhat resembles in form, if not in colonr. It 
has eight pairs of legsin the adult state, the front pair being 
much the longest. Unlike its relative, the Gooseberry 
Mite (which see), it spins no web. 
The first symptoms of attack are an unhealthy appearance 
of the leaves, which prematurely yellow. Such leaves, if 
examined by the aid of a pocket-lens on their under-surface, 
will be found to harbour numbers of the pests in various 
stages of development. The mature Mites are reddish- 
brown ; while the larvze vary considerably as to colour. 
Prior to the second moult the larve are red, and have but 
six legs. Later the remaining pair is developed, and the 
colour of the creature undergoes a change. As winter 
approaches, the larve hide beneath the bark or beneath the 
growths which are allowed to form upon trunk and branches. 
Here they live in comparative safety, awaiting the advent 
of the tender young leaves in the spring. 
When the Mites are detected the trees should be sprayed 
with a weak solution of Kerosene Emulsion, sold ready 
prepared; and in winter, when the trees are at rest, they 
should be cleansed of Moss and Lichen by the aid of a caustic 
potash and soda solution sprayed on. See Lichen. 
DANAA. A synonym of Physospermum (which see). 
DANAE (a classical name ; Danaé was the daughter of 
Acrisins, King of Argos, by Eurydice). Syn. Danaidia. 
Orv. Liliacee. A monotypic genus. The species, 
D. Laurus, is described on p. 335, Vol. III., under its old 
name, Ruscus racemosus. 
DANZA. It is a matter of regret that the requirements 
of these interesting Ferns shonld be so little understood. 
Many importations have taken place within the last few 
years, but none of the species has become plentiful : 
the various kinds of treatment have invariably produced 
unsatisfactory results. Cases after cases of these plants, and 
A synonym of 
