102 THE ORCHID REVIEW. [APRIL, 1908, 
several Cypripedium seedlings on a pot. How they got there I don’t know, © 
These I transferred to small pots, but I have lost all but one. I sowed some 
Dendrobium seed in February, and without exaggeration I should say there 
are some thousands germinating, but I anticipate that the result will 
as in the other instance, nil. 3 
My collection has now assumed a respectable size, consisting. as it does, . 
of some 950 plants. The Cattleyas and Dendrobiums do wonderfully well, 
one of my D. nobile having made a bulb 33 inches long by an inch in 
diameter. My method of culture is a very ordinary one, and would 
interest, but it evidently suits the plants. I am of opinion that anyo 
with ordinary intelligence, provided that the interest is there, can gro 
either Cattleyas, Lelias or Dendrobiums. y 
At present I have not been very successful with Odontoglossums, but I 
expect to have much better results during the current year. The house¥ 
not suitable, but I have made a complete alteration. It is a lean-to, and] 
have had the stage altered, and the back wall covered with ferns, and these, 7 | 
being continually moist, have added considerably to the humidity of the 
atmosphere—in fact, with all the ventilators open, the hygrometer registets | 
5 degrees below saturation point, whereas with only the lower ventilatots | 
open one degree below saturation is easily maintained. Of course, 
these conditions have only obtained since I made the above alterations. | 4 
With Zygopetalums my failure has been complete, deterioration : 
invariably commencing with the young growths, the central leaves turning 
black, and rotting out.—A mateur. 
INHERITANCE OF ALBINISM IN ORCHIDS. 
Ar the meeting of the R.H.S. Scientific Committee held on March 3f¢ 
the following communication was read from Mr. C. C. Hurst, F.L5:# 
“Two distinct and definite cases of albino Orchids producing coloured 
forms when crossed were recently brought before this Committee by Mr. 
H. J Chapman. Such facts, accepted by the Mendelians, are important 
inasmuch as they go to show that albinism in Orchids is inherited 1 * 
similar manner to albinism in Sweet Peas and Ten-week Stocks, and in 
accordance with Mendel’s Law. An albino Orchid is distinguished from 2 
frie : pies , the absence of purple sap. _ For instance, the well-know® 
ea ae Ss igi insigne Sandere is an albino form a 
witge purple sap of the type has disappeared. Recent experimel 
with Sweet Peas and Stocks, carried out by Mr. W. Bateson, F.R.Sa #P 
R. C. Punnett, and Miss E. R. Saunders, at Cambridge, have fully 
demonstrated that the appearance of sap colour depends on the simultane 
ous presence of two colour factors, If both of the colour factor a 
present the sap is coloured, but if either (or both) of the colour factor . 
