January 30, 1892. 
THE GARDENING WORLD. 
343 
tivation may raise them to 18 in. The lateral shoots 
give off minor branches in a somewhat fan-shaped 
manner. The leaves are of a rich dark green, almost 
glaucous hue, when the plant is grown under suitable 
conditions, that is in a moderately high temperature 
with sufficient atmospheric moisture. It is one of 
the few species that may be grown well in a vinery, 
greenhouse or conservatory in shady positions. It 
is a native of Western China, and has for many years 
been pretty extensively cultivated in British gardens. 
—Selaginclla. 
(To be continued.) 
CHICAGO EXHIBITION, 
1893. 
The Royal Commission for this exhibition have is¬ 
sued the full text of the classification for the depart¬ 
ment which includes Viticulture, Horticulture and 
Floriculture, and we may remind intending exhibitors 
that February 29 Is the last day for receiving entries, 
which should be sent to Sir Henry Trueman Wood, 
John Street, Adelphi, W.C. The charge for space 
varies from 2s. 6d. to 5s. per square foot, but the 
minimum charge will be £5. 
There are fourteen classes in the section devoted 
to Viticulture, four for Horticulture, twelve for 
Floriculture, three for Arboriculture, five for Pomo¬ 
logy, nine for Preserved Fruits and Vegetables, and 
six for Appliances and Methods of Horticulture, &c. 
The classes in the sections in which our readers will 
probably be the most interested are arranged as 
follows:— 
Horticulture. — Garden vegetables and their 
cultivation. — Market and truck gardening.—Esculent 
vegetables,—Garden tools and other accessories of 
gardening. 
Floriculture. — Hardy perennials, flowering 
shrubs, etc., other than Roses, Rhododendrons, etc. 
—Roses of all varieties.—Rhododendrons, Azaleas, 
and wild flowers.—Orchids and Orchid houses.—Or¬ 
namental leaf plants.—Bedding plants and annual 
flowering plants, ornamental bulbs, etc.—Flower and 
seed trade : Methods of testing vitality of seeds.— 
Cactaceae. — Aquatic plants and their culture. 
Nymphsea, etc.—Cut flowers and florists’ work.— 
Floral designs, etc. Bouquets, preserved flowers, 
leaves, sea-weeds. Illustrations of plants and 
flowers. Materials for floral designs. Bouquet 
materials, bouquet holders, bouquet papers, table 
decorations. — Receptacles for plants. Flower 
pots, plant-boxes, tubs, fern-cases, jardinieres, etc. 
Window gardening. Plant and flower-stands, ornate 
designs in iron, wood, and wire. 
Arboriculture.—O rnamental trees and shrubs : 
Methods of growing, transplanting, etc.—Fruit trees 
and methods of rearing, grafting, transplanting, 
pruning, etc. ; means of combating insects and other 
enemies.—Nurseries and the nursery trade. 
Pomology.—F ruits of temperate and sub-tropical 
regions, as Apples, Pears, Quinces, Peaches, Necta¬ 
rines, Apricots, Plums, Grapes, Cherries, and 
Melons ; cold storage, and other methods of keeping 
packing, and shipping.—Citrus fruits : Oranges, 
Lemons, etc.—Bananas, Pine-apples, and other 
tropical fruits, except citrus fruits. — Small fruits 
Berries, etc.—Casts and models of fruits. 
Appliances and Methods of Horticulture, 
Floriculture, Arboriculture, etc.—H ot-houses, 
conservatories : Methods of construction, manage, 
ment, and operation.—Heating apparatus for hot¬ 
houses and conservatories.—Hot-beds, forcing and 
propagating houses and appliances.—Seats, chairs, 
and adjuncts of the garden and conservatory. — Orna¬ 
mental wirevvorlc, trellises, fences, borders, labels for 
plants and trees, etc. — Garden and nursery adminis¬ 
tration and management: Horticulture, floriculture, 
and arboriculture as arts of design and decoration. 
Laying out gardens: Designs for the laying out of 
gardens and the improvement of private residences ; 
designs for commercial gardens, nurseries, graperies ; 
designs for the parterre. Treatment of water for 
ornamental purposes : Cascades, fountains, reser¬ 
voirs, lakes. Formation and after-treatment of 
lawns. Garden construction, building, etc. : Rock- 
work, grottoes ; rustic constructions and adornments 
for private gardens and public grounds. Planting, 
fertilizing, cultivating, and appliances. 
. » 
♦ 
Florist’s Wife, 10 a.m.—"A nton, why do you 
want to drink beer so early in the morning, would not 
a glass or two of water do as well ? " 
"Keep quiet, old woman, water is too valuable 
tor my plants ,"—Staats Zeimng, 
ORCHID NOTES AND GLEANINGS. 
A new yellow Odontoglossum. 
At Messrs. Protheroe & Morris’ Rooms, on the 23rd 
inst., a very interesting new yellow Odontoglot came 
up for sale from Messrs. Charlesworth, Shuttleworth 
and Co. In general characters it came nearest to 
the type of O. excellens, but was of beautiful form, 
clear bright yellow, with a ray of whiteup the sepals, 
and all the parts spotted with cinnamon brown. The 
curious thing about it is that it did not come from 
the excellens district, but came with last year's 
importations of O. Alexandras from the hunting 
grounds for that species in the regions about Bogota. 
Cattleya Percivaliana. 
The flowers of this Cattleya, but more particularly 
the lip, are of a rich dark colour, and expanding as 
they do at a season of the year when other Cattleyas 
are conspicuous by their absence, Orchid growers, 
more especially those outside the smoke radius of 
large towns, place considerable value upon them. 
The sepals and petals of the ordinary form are rosy- 
lilac tinted with purple. The terminal lobe of the 
lip is crimson-purple, more or less tinted with 
maroon, while the interior of the tube is beautifully 
striped with red or purple on an orange ground. A 
very fine variety flowered recently in the nursery of 
Mr. P. McArthur, 4, Maida Vale, W., and which had 
a very dark lip margined with white, as sometimes 
occurs in other forms of C. labiata. The Cattleya 
under notice is the earliest to flower, the last blooms 
of it generally being overtaken with the earliest 
flowers of C. Trianae. 
Cypripedium venustum pardinum. 
There is an Indian species named C. pardinum and 
with which that under notice is liable to be confused, 
in the names at least, unless the specific name of the 
plant under notice is kept in view. The variety is a 
rare one and much superior to the type in several 
respects. The plant itself is of a dwarf, compact 
habit with short leaves, in fact the flowers are wider 
across the petals than the leaves are long, and are 
also larger than those of the type. The upper sepal 
is of a purer white, with broader and deeper green 
veins. The petals are purple in the upper portion, 
and furnished with larger and more scattered pur¬ 
plish-black warts or spots, hence the name pardinum. 
The lip has lost much of the green and brown shad¬ 
ing characteristic of the type, and appears more 
yellow. The fine variety recently flowered with Mr. 
P. McArthur, 4, Maida Vale, London, W. 
Odontoglossum Pescatorei. 
The flowers of this popular species are generally 
smaller than those of the equally useful O.crispum, 
but they are more abundantly produced on a branching 
scape. A very fine form has been flowering for some 
time past in the London Nursery, 4, Maida Vale. The 
flowers have broad petals and are pure white, with 
exception of the lip which is beautifully spotted with 
violet. The scape originally carried thirty flowers, 
but some of them have since been cut, and it now 
bears twenty which are very effective. 
Dendrobium Wardianum. 
Cultivators are now managing this species more 
successfully, and plants are not lost in the wholesale 
fashion they used to be. Formerly it was recom¬ 
mended that the plant should be grown on a block 
or in a basket, and it may certainly be grown in the 
latter or even in pots in the same way as D. nobile. 
It is grown the latter way by Messrs. J. Laing & 
Sons, Forest Hill, who succeed admirably with it. 
The stems vary from 2 ft. to 5 ft. in length, and are 
abundantly set with buds which are now swelling 
fast. Stems of such vigour could never be grown 
upon a block without a great deal of trouble or 
labour in the way of watering and feeding ; when so 
grown it generally means a starvation process as we 
see in various other species usually reckoned difficult 
to deal with but which prove of free and easy growth 
under different conditions. 
Cypripedium callosum. 
The. flowers of this species somewhat resemble 
those of C. Lawrenceanum, and are chiefly notable 
for the great size of the upper sepal, which is broadly 
cordate, white and beautifully marked with 
alternately longer and shorter veins, which are green 
towards the base, and purple upwards. The organ 
varies from 2J in. to 3 in. broad, and constitutes the 
most conspicuous part of the flower. The slightly 
deflexed petals are soft rose-purple in the upper 
portion, with a few blackish warts near the upper 
edge. Twin flowers are frequently produced by well- 
grown plants, and we noted it in this condition in the 
nursery of Messrs. J. Laing & Sons, Forest Hill. 
1 he vigour of the species also enables it to withstand 
the London fogs much better than many of the less 
robust kinds. Its native country is Siam, or Cochin 
China, from whence it was introduced as recently as 
1885. 
Trichocentrum triquetrum 
The habit of this Orchid resembles very much that 
of an Iris about six inches high. The leaves are 
erect, deep green, and arranged in the same way as 
those of an Iris, for a dwarf species of which it 
might be mistaken when not in bloom. The flowers 
are produced singly from the axils of the leaves, and 
hang downwards on short peduncles much in the 
same way as those of some species of Masdevallia. 
They are of a pale yellow, blotched with orange 
markings all over the lip. The spur at the base of 
the lip is somewhat over an inch in length. As anew 
species it is very interesting, and somewhat more 
showy than those hitherto known. In the matter of 
cultural treatment it likes plenty of light and heat, 
and, in the growing season, plenty of water. Small 
pots or pans plunged in a basket amongst sphagnum, 
and hung up near the glass in the warm house, will 
prove the most suitable for it. Messrs. Charles, 
worth, Shuttleworth & Co., Heaton, Bradford, and 
of Clapham, introduced it from Peru, and flowered 
it in May last. Messrs. Linden, of Brussels, also 
flowered it soon after. There is a fine coloured 
illustration of it in Lindenia, pi. 311. 
Odontoglossum ramosisslmum. 
Amongst the taller growing and free branching 
Odontoglossums, that under notice is worthy of a 
place to give variety to the dwarfer and few flowered 
species. Those who can appreciate the beauty of 
variety cannot fail to see the value of O. ramosissi- 
mum. It requires rather more space than O. crispum, 
seeing that the leaves are linear-strap-shaped, and 
2 ft. to 3 ft. long, and the pseudo-bulbs are also large. 
The panicle is 3 ft. long, and much branched, with a 
profusion of medium sized but pretty flowers, and 
attractive in the aggregate. The sepals are lanceo¬ 
late, wavy, and white, with a few violet blotches on 
the claw ; while the petals are similar, except that 
they are blotched with violet-purple all over the 
lower half. The lip is triangular at the base with a 
long point, and the broad base is violet, with a white 
crest, consisting of nine lobes. The column is also 
tinted with violet. The above are the characters as 
taken from a plant in the nursery of Messrs. Charles- 
worth, Shuttleworth & Co., 213, Park Road, Clap- 
ham, but individuals or varieties show some range 
of variation in the amount of spotting. The species 
is a native of Venezuela, and very showy, although 
by no means common. 
Cypripedium barbatum Warneri. 
The beauty of this variety lies in its dwarf habit and 
the rich colouring of the upper sepal. The flower 
scape is about S in. or 10 in. high, and the compact 
foliage does not differ from that of the type. The 
dorsal sepal is white on the upper third of its length, 
with a broad /y-shaped band across the middle ; the 
basal portion is pale with numerous bright green 
lines. The slightly declining petals are rosy-purple 
on the lower longitudinal half.ymd at the apex with 
a few black warts on the upper edge. The lip i3 
moderate in size, and dull purple. There is no 
regular time for the flowering of this fine variety, and 
if a few plants of it are kept, its attractive flowers 
may be had at almost any season. It is in bloom now 
in the nursery of Messrs. Charlesworth, Shuttleworth 
& Co., 213, Park Road, Clapham 
WHAT TO DO IN THE GARDEN. 
Thrip and Red Spider 1 in the Stove.— Great 
watchfulness must be kept over the occupants of the 
stove till the weather gets warmer, the days longer, 
and more moisture is maintained in the atmosphere 
of the house. The hard firing that has been neces¬ 
sitated to keep up the temperature during frosty 
nights and cold winds, often encourages the spread 
of thrip and red spider to an alarming extent before 
they are noticed. Fumigation if carefully carried 
out will destroy thrips ; and in case any plants are 
in flower, and the blooms likely to be injured with 
strong smoke, a light fumigation may be given on two 
successive nights. Red spider may be destroyed by 
