148 . THE ORCHID REVIEW. 
CYRTOPODIUM VIRESCENS. 
Two species of Cyrtopodium are pretty well known in gardens, namely, 
C. punctatum (Saintlegerianum) and C. Andersonianum (cardiochilum), 
besides which a new species, C. Aliciz, has recently appeared. Several 
others are known from dried specimens and drawings, and one of them, a 
native of Brazil, has now been imported by Messrs. F. Sander and OnE 
St. Albans, with whom it has recently flowered. The flowers are rather 
smaller than those of the two species first named, and the plant consider- 
ably dwarfer. The sepals and petals are greenish yellow, spotted with red- 
brown, and the lip a little brighter in colour, with purple side-lobes. It 
was originally discovered in the neighbourhood of Lagoa Santa, and flowers 
during the autumn. 
Cyrtopodium virescens, Rchb. f. and Warm. in Osa Bot. Hamé. (1881), p. 89 ; Warm. 
in Kjobenh. Vidensk. Meddel, 1884-86, p. 88, t. 7, fig. 4. “ee 
CALENDAR OF OPERATIONS FOR MAY. 
By H. A. Burperry, Highbury, Moor Green, Birmingham. 
Tuts will be a busy month. All species of Orchids are in active growth, 
and must be assisted by all possible means, making the most of this and 
the following three months to complete the building up of strong pseudo- 
bulbs. Constant attention is necessary, or the plants may receive a check 
which they may not be able to recover from for some time: 
Cool-house Orchids are easily injured by heat, and must now be kept as 
cool as possible. Should the outside conditions be hot or very dry, it is 
best to use the top ventilation with discretion during the heat of the day, 
~ but taking care to use them freely during the night. The temperature 
‘must be kept down in the daytime by heavily shading, removing the same 
when the sun has lost its power in the evening, and by a frequent use of the 
hose-pipe, thoroughly damping down every available space. Lattice-work 
blinds raised a few inches from the glass has the advantage of keeping the 
house much cooler than “stuff” blinds. No plant in this department 
must suffer from drought, but should not be kept in a sodden condition. A 
slight spraying overhead may be given with advantage after a day’s warm 
sun, but soft water must be used. 
I am of the opinion that Cattleyas and Lezlias are frequently denied 
sufficient heat during. the growing season. It is then that these species 
delight in a liberal treatment, and an abundance of moisture must be given 
in the atmosphere, and the plants themselves well watered. It is necessary 
to shade many of them from the scorching rays of the sun, as stated in 
