58 THE ORCHID REVIEW. (FEBRUARY, 1907- 
parents. The horticultural side of the question will take care of itself, but 
we want more than fine things. We want to know also their origin and 
relationship to each other, for we have already too many that are of quite 
doubtful parentage. 
In conclusion we may add that M. Linden also encloses a photo show- 
ing a house with seedling Cypripedes on one side and Cattleyas crossed. 
with allied genera on the other. 
EPIDENDRUM x KEWENSE: A MENDELIAN EXPERIMENT. 
Tue history of Epidendrum x kewense has already been given in this. 
work (vol. xi. p. 6). The reciprocal crosses between E. erectum and E. 
xanthinum, which produced it, were made before the Mendelian problem was 
engaging so much attention, but when the hybrids flowered it was obvious 
that here was material for a very interesting Mendelian experiment. The 
two parents, though so closely resembling each other in general character, 
possess one very marked difference, namely, that of colour, one having 
flowers of a very deep self purple, the other of a clear bright yellow. There 
were also the advantages that the pollen can be easily manipulated, with- 
out much risk of the results being vitiated by stray pollen from some un- 
known source, and that the seedlings arrive at the flowering stage within a 
reasonable period. Accordingly, at the end of 1goz, I carefully self- 
pollinated several flowers in succession, but without getting a capsule. I 
then crossed and recrossed the hybrid with both its parents, and succeeded 
in getting two out of four possible capsules, namely E. xX kewense ? X 
evectum g, and E. xanthinum @ X kewense d. The seeds ripened in the 
course of the summer and were at once sown, both yielding plenty of 
seedlings, of which only a few could be kept and grown on. Last autumn 
three spikes began to push. A flower of E. xanthinum x kewense 
expanded first, and proved to be orange-yellow, decidedly deeper in colour 
than the seed parent. A bad spell of fog came, and the rest of the buds 
dropped. There is a second spike of the same cross, but the buds are not 
yet open. Flowers of the other cross, E. X kewense x evectum, expanded 
a few days later, and proved to be bright purple, with a yellow crest ; not 
so deep a purple as the pollen parent, in which the crest also is purple- 
Both the secondary hybrids are therefore partially intermediate, as in the 
case of Phragmopedilum x Sedeni recrossed with its two parents. Over 
a year later, when the plants of E. x kewense were stronger, I again 
tried to self-fertilise the flowers, and this time obtained a good capsule- 
and plenty of seedlings, which are now over a year old, and in thriving 
condition. When these arrive at the flowering stage the results should 
be very interesting. I may add that the results of these crosses have 
already been predicted from a Mendelian standpoint, but it remains to 
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