296 THE ORCHID REVIEW. 
Epidendrum Pseudepidendrum, an extremely rare plant, grows at 
Bugaba, in Chiriqui, occupying an area of less than two miles diameter, 
and there it fruits regularly. Once I found a single and unique specimen 
of it at Potrerillos, some fifteen miles from Bugaba, whose big dimensions 
and freedom of flowering showed that the climate of Potrerillos was even 
more congenial to it than that of Bugaba; but the numerous flowers of 
that specimen never became fertilised, although the locality was full of 
native bees. And so it is with the rare Odontoglossum Krameri, which 
grows in a very restricted locality in Chiriqui, and again one hundred and 
fifty miles off in Costa Rica. The two or three unique and isolated 
specimens I found of it far off from their natural spots were always sterile. 
Such was also the case with Odontoglossum chiriquense, Rchb. f., of which 
I discovered the first and quite isolated specimen ten miles away from its 
very restricted natural habitat. 
As to which particular insects fertilise the commoner Orchids of Costa 
Rica, I can say very little—in fact, it is a much more difficult matter than 
it looks; and while I doubt not that with time I can discover a few or 
perhaps many of them, yet it will be a long and weary task, and I am no 
longer a young man. My business obliges me to remain almost constantly 
at my nursery establishment, and on my now rather rare personal explora- 
tions I feel (quite contrary to my younger years) always somewhat uncom- 
fortable until I can return home, and, therefore, I am not too anxious to 
prolong my journeys with scientific researches. At home at my nurseries, 
however, I spend much more time and care in such investigations ; but 
the fact is that the surroundings of our capital are as thickly populated 
as is the average of England, and remarkable wild growing Orchids 
are near here nearly as scarce as they are near London, and therefore 
the chance of discovering the certainly very scarce and always local insects, 
that do the work of fertilisation in their respective districts, is of course 
very little. 
I trust that sooner or later both myself and others may be able to 
communicate some more observations, which will throw further light on 
this interesting problem. 
San José de Costa Rica. RICHARD PFAUv. 
CATTLEYA GASKELLIANA ALBA. 
This beautiful albino has recently flowered in several collections, and a 
charming and very fragrant Cattleya it is, as is well illustrated by a flower 
Sent from the collection of W. Thompson, Esq. Walton Grange, Stone, 
Staffordshire, by Mr. Stevens. When Reichenbach described it in 1888, he 
_ Temarked that it might be distinguished from the variety albens by its 
