OcroBEK, 1921.] THE ORCHID REVIEW. ixg 
in the vicinity of large towns, and plants flowering during late summer and 
-early autumn always develop better blooms than in late autumn and early 
winter, owing to the better light. It is no easy matter to maintain this 
species in a robust condition. A constant supply of fresh air and plenty of 
sunlight are necessary to obtain good results. The troublesome watery 
spots that appear in the leaves and afterwards turn black are most prevalent 
during the winter, when the leaves are most active. Given abundance of 
light and air during the growing season, the foliage becomes hard and solid 
and not so liable to spotting. The only method of combatting the trouble 
is to avoid an excess of moisture, both at the roots and in the atmosphere, 
and, at the same time, to keep the house well ventilated whenever the 
weather is favourable. During the resting period the plants should be given 
a light position in a house having an intermediate temperature, and water 
given only when the leaves show signs of shrivelling. 
Vanda Kimballiana and V. Watsonii.—Two of the most charming 
and fascinating plants in the whole Orchid family. The flower spikes of 
these species are well advanced, and ere the blooms commence opening, 
the plants should be placed in slightly warmer and drier conditions, 
where the flowers will develop better, and not be so likely to become 
spotted as in a cool, moist atmosphere. The flowering season over, 
the fleshy roots should be afforded less water, reducing the amount 
gradually. During winter the plants may be rested in a cool-intermediate 
house. 
Thunias.— After these plants have done growing and the leaves have 
fallen they require a thorough season of rest. They should soon be in that 
stage, and during the resting time they will not require any water at their 
roots. The pots may be placed on their sides on a shelf out of sight, where 
Ihe temperature does not fall lower than 50 to 55 degrees. 
Dendrobium Wardianum. —This species was originally introduced by 
Simons in 1856, and soon afterwards flowered in Messrs. Jackson’s 
Nursery, at Kingston, being at first figured as a variety of D. Falconeri, 
but afterwards under the above name in honour of Dr. Ward, of 
Southampton, who also flowered it. These original plants were collected 
In Assam, and have slender stems. The stouter Burmese form was 
introduced by Messrs. Low & Co., in 1875, and was figured and described 
-as D. Wardianum var. Lowii, and subsequently as D. W. giganteum. 
The Burmese form grows intermixed with D. crassinode and hybridises 
with it. D. Wardianum candidum has pure white flowers, but maintains 
the yellow disc and the two eye-like brown spots. In the variety album 
these brown spots are absent. 
