94a THE ORCHID REVIEW. 
ing to reproduce, two of the names, however, being altered in conformity 
with the now accepted standard. 
Mr. Roebelen commences by remarking that it is, undoubtedly, of great 
importance to botanists to have as much information as possible when 
describing a new species; its surroundings and its nearest allied neighbours : 
being almost as necessary as the simple description of the plant itself. He 
then endeavours, as far as his own experience will allow, to give the exact 
distribution of the species of Euphalenopsis which grow in the Philippine 
Islands. The long chain of extinguished volcanoes, running from south to 
north, connecting the Moluccas with the Island of Formosa and Japan, 
seem to have had their part in the distribution of Phalenopsis, as almost 
all the known species lie in this line, and away from which they do not 
appear so numerously. Moreover, each well defined species may be 
connected with its own extinguished volcano, and around which it grows — 
more numerously than elsewhere. Singularly enough, the few active | 
volcanoes, although well-wooded to a great height, are almost destitute of 
Phalenopsis. Beginning at the southermost point of the Archipelago, lies 
the small island of Balut, at 6° N. lat., with its extinguished volcano, 
Sarangani. Here the typical form of P. Sanderiana grows—leaves green 
and flowers dark rose-coloured—and no other form is to be found on the 
island. Their area of distribution may be said to lie between the sea-level 
up to an elevation of 800 feet, which corresponds exactly with the limits of 
bamboos in these latitudes—the beginning of the fern region. Crossing the 
Channel to the Island of Mindanao, the second in extent of the Philippines, 
along the coast from the south point, Saragani to the west, as far as the 
volcano of Pollok, a white-flowered Phalznopsis grows, with silver-grey 
markings on the leaves, similar to those of P. Schilleriana, but not yet 
described as a distinct species, though often sent home amongst plants of 
P. Sanderiana. It is most likely that from here came the variety known as 
P. Schilleriana alba. Turning to the East, to the Bahia de Davao, from 
Sarangani to the River Hijo, from the very sea-shore up to the slopes of the - 
‘volcano Apo, came all the Phalznopsis sent home as P. Sanderiana. 
It is on this particular spot that so many varieties have been found 
having variation in the colour of their flowers and the markings of the 
leaves—the result, undoubtedly, of intercrossing between three different 
species, viz., P. Aphrodite, P. Sanderiana, and the white-flowered silver- 
grey-leaved species. In no other part of the Islands are so many species 
formed in such near proximity. as there. Although P. Aphrodite and Bex 
Schilleriana are to be found growing in close proximity to each other in 
the island of Luzon, yet they do not seem to intercross with such facility 
as the above-mentioned species undoubtedly do. On the north coast of 
Mindanao, from the south-west point of Zamboanga up to the River 
res 
