1900 SUPPLEMENT—RECENT INTRODUCTIONS, &C. 307 
Dendrobium—continued. 
are always songht after. These are now extensively grown 
for cut-flower purposes. The exhibition tables also are 
adorned profusely with these gems during the early spring 
months of the year. 
With the more extensive cultivation of Dendrobiums, it is 
pleasing to note that mary of the “old fads,” such as grow- 
ing the plants on blocks, the absolute necessity of using 
charcoal for drainage, the hard-and-fast rales for damping 
the houses, watering, and their barbarous treatment during 
the resting season, are things of the past. Under the more 
generous and practical methods now adopted this section of 
plants is now grown far more easily and with better 
results than was the case in the past. 
The requirements now generally accepted in the success- 
ful culture of decidnous Dendrobiums are—first, to place 
the plants in as small a receptacle as possible, so that very 
little compost indeed is required, and that consisting of 
fibrous peat, with the whole of the dust extracted, and 
chopped living sphagnum in equal portions ; secondly, to 
pot immediately after the plants have Sowered and are 
commencing to emit new roots from the base of the growth ; 
and, thirdly, to give every encouragement to induce rapid 
and vigorous growth. ‘The whole section reqnires any 
amount of strong light throughout the year. Only sufficient 
shade is required to prevent actnal scorching of the foliage. 
In such conditions, and by maintaining during the day a 
high temperature in the house without resorting to 
fire-heat, rapid growth may be ensured. During the 
summer, at night only will fire-heat be necessary. In 
bright weather the plants may be liberally syringed, and 
every measure used to keep the atmosphere at the 
saturation point. The plants may also be watered when- 
ever they become anything like dry. 
The lower ventilators should be brought into use early in 
the day, and closed again as soon as possible after the 
middle of the day. As soon as this has been done, and the 
outside conditions are favourable, the whole of the plants 
should be given a thorough syringing overhead. This 
operation should always be done sufficiently early to 
enable the foliage to become dry before the cool 
evening, with a lowering temperature, arrives. These 
conditions should be maintained until the growth has 
matured; after which the plants should be gradually 
removed to cooler and drier quarters, where they may have 
an abundance of air and every inducement given to enable 
them to properly ripen their growths. 
During the season of rest only snfficient water will be 
required to maintain the bulbs in aplump condition. When 
any indication of the shrivelling of the bulbs is observed, 
such plants should be dipped in water, which induces them 
to plump up readily, and they soon regain their normal 
condition. The proper maturing or ripening of the growths 
is one of the principal requirements for the satisfactory 
flowering and for the future well-being of the plants. It is 
not desirable to place the plants into heat too soon after 
they commence to push their flower-brds, as they are 
sometimes thereby induced to turn their flower-bnuds into 
side-shoots. They should be gradually brought into their 
flowering quarters, and more liberal conditions provided 
until the flower-buds can be defined, when they shonld have 
every encouragement to induce them to expand their 
flowers. 
This section may be easily propagated, if it is desirable 
to increase the stock, by the cutting off of any of the 
back bulbs that possess nodes or eyes which have not 
flowered, and placing them in a basket of sphagnum, or by 
laying them on cocoa-nut fibre in the propagating case. 
The breaks are produced from the side eyes: when the 
breaks get well away, root action commences at the base. 
They may then be removed by carefully cutting away a 
mall portion of the old bulb with the new growth, and 
potting them up in the usual way. The potting compost 
should consist of finely-chopped sphagnnm and rongh sand. 
Every encouragement must then be given by heat and 
moisture to induce a free growth. 
The extensive importations of the lovely D. Phalznopsis 
has placed this noble species within the reach of all. The 
variable characteristics have been enormons, and are now 
so familiar that they need no description here. D. John- 
sone, the lovely D. atroviolacewm, and others, of what 
may be termed the New Guinea section of Dendrobiums, 
have also been extensively imported. These must be kept 
in the warm division throughout the year. Little moisture 
Dendrobium—continued. 
will be required at the roots during the rooting season : only 
sufficient should be given to maintain the bulbs in a plump 
condition. With the evergreen section very few additions 
have been made, and those do well under the conditions 
previously advised for this class. 
To the species, varieties, and hybrids- described on 
pp. 452-8, Vol. I., the following should be added - 
D. z#mulum (emulous). #7. white, fragrant, liin. across, the 
apical half of the segments sometimes stained pale yellow ; sepals 
narrow-lanceolate ; petals linear ; lip very short, three-lobed, the 
side lobes acute, spotted pink, the middle one reflexed ; Tacemes 
terminal, , five- to seven-flowered. Stems terete, 2in. to 4in. or 
more in length, sometimes tapering to a long, thin base with a 
small pseudo-bulb, and bearing at their summit two or three very 
coriaceous leaves. Australia. (B. M. 2906; F. A. O., i., part ii.5; 
G. C. 1895, i., p. 484.) 
D. amboinense (Amboyna). f- in pairs; sepals and petals 
creamy-white, spreading, nearly 3in. long, linear-lanceolate ; 
lip small, yellowish, edged with dark purple. J. terminal, 
oblong, acute. Stems jointed, bulbiform at the very base, four- to 
six-angled above. Amboyna, 1856 and 1895. A very singular 
species. (B. M. 4937 ; F. d.S. 1211.) 
D. amethystoglossum (amethyst-lipped). 1. ivory-white, 
except the amethyst-purple anterior lobe of the lip, crowded. 
about lin. in diameter; sepals and petals ovate-oblong, acute ; 
lip elongated, linear-spathulate, apiculate, convex in the middle, 
incurved at the margins except towards the apex; spur long, 
obtuse; column exposed; racemes 3in. to 5in. long, many- 
flowered. January and February. J. sessile, oval-oblong, sub- 
acute. Stems robust, sometimes 2ft. to 3ft. high and nearly lin. 
thick. Philippine Islands, 1872. (B. M. 5968.) 
D. anceps (two-edged). #. greenish or yellowish, 4in. long, 
axillary, very shortly pedicellate; mentum longer than the 
sepals; lip cuneate-oblong, obscurely three-lobed. 7. lin. to Liin. 
long, lanceolate or ovate-lanceolate, acute. Stem lft. to 3ft. 
long, stout, flattened. India. Syn. Aporum anceps (B. M. 
A 1239; L. B. C. 1875). 
D. anosmum (scentless). A form of D. superbum. 
D. Antelope (antelope-horned). _f. yellowish ; sepals ligulate- 
triangular, acute; petals long, antenniform, upright, painted 
sepia inside; lip striped and speckled mauve, the square anterior 
lacinia having its abrupt apiculus short. Moluccas, 1883. 
D. arachnites (cobwebby). jf. bright cinnabar-red, in fascicles 
of two or three, but sometimes solitary, 24in. across when spread 
out; sepals and petals linear, acute; lip veined purple, shorter 
than the other segments, sub-pandurate, convolute over the 
column at the base; column very short. J. linear-lanceolate, 
acute, 1sin. to 2jin. long. Stems terete, 2in. to 3in. long. Moul- 
mein, 1874. Very rare in cultivation. 
D. atropurpureum (dark purple). #. yellowish or pink, about 
4in. long, sub-sessile in axillary, shortly peduncled, bracteate 
heads ; mentum as long as the sepals; lip thick. J. lin. to 14in. 
long, variable. Stem 4in. to 6in. long. Tenasserim, &c. 
D. atroviolaceum (dark violet).* 7., sepals and petals creamy- 
white, spotted with deep purple; lip violet-purple inside, green 
outside, three-lobed; spike terminal, erect. Spring. Pseudo- 
bulbs tapering downwards, persistent, with two or three stont, 
leathery leaves near the apex. New Guinea, 1890. (B. M. 7371: 
G. C. 1894, xv., p. 113, f. 12; J. H. 1894, xviii., p. 65, f. 10; W.O. A; 
x., t. 444.) 
D. Augustz Victoriz (Augusta Victoria's). 
D. veratrifolium. 
D. aurantiacum (orange). 
tiacum. 
D. aureum album (white). 7. very pale, nearly white. A flower 
of the typical species is shown in Fig. 326. 
D. a. aurantiacum (orange). j. orange-yellow. The richest- 
coloured of all the varieties. SyN. D. aurantiacum. 
D. a. Henshalli (Henshall’s). /., lip white, suffused yellow at 
base, where there are two reddish-purple spots. (B. M. 4970, 
under name of D. heterocarpum Henshalli.) 
D. a. pallidum (pale). fl. sometimes smaller than in the type; 
lip erie with the exception of a yellow stain at base. Stems 
longer and slenderer. (B. R. 1839, t. 20.) 
D. barbatum (bearded). 1. white; lip three-lobed, edged with 
long, flexuous hairs; racemes terminal, short, four- or_five- 
flowered. Pseudo-bulbs bearing six or seven lanceolate-linear 
leaves. Birma, 1897. Allied to D. ciliatum. 
D. bicameratum (twice-arched). i. yellow, with red speckles 
arranged in stripes, in. broad, crowded on a short, sheathed 
eduncle; lip golden-yellow. J. linear-lanceolate, 3in. to 4in. 
ong, obliquely bifid. Stem clavate, fusiform, or elongate and 
lft. to lift. long. Sikkim Himalaya, 1837. Plant variable 
(Ref. B. 143.) Syn. D. breviflorum. 
A synonym of 
A synonym of D. aureum auran- 
