BOTANICAL NOTES. 
187 
To this should be added about 30 numbers of palms and orchids, which 
will show similar proportions between duplicated and single collections, 
with a small balance in favor of the later months. The mosses, 28 num- 
bers, and the fungi probably contain little of interest. On the other 
hand, the lichens are expected to add materially to the list of Philippine 
species. In spite of the disparity in numbers, Mr. McGregor’s collection 
was the more interesting of the two. 
As practically all belong to the Bureau of Science series, they will be 
cited by number only, except in the case of new species. Mr. McGregor’s 
numbers are from 10210 to 10574 and 10761 to 10783, mine are 6792, 
6831 to 7000, .9001 to 9308, and 9592 to 9597. 
The island is peculiarly rich in epiphyllous hepatics and lichens, the 
former much the more abundant in August, the latter forming a greater 
percentage later in the year. This feature had been noted by Mr. 
J. B. Leiberg, who had previously visited the island. They occur at all 
elevations, but are somewhat most abundant just within the outer fringe 
of vegetation along the coast. They are practically always confined to 
the upper surface of mature leaves, and in the humid atmosphere of 
Polillo seem to have no difficulty in reaching the fruiting stage within 
such a period as the length of the life of the leaf will permit. As yet, 
the determinations of the lichens have not been received, but the hepatics 
have yielded a high percentage of novelties. 
On the other hand, but one genus of flowering plants was obtained 
which was not previously recorded from the Philippines, and it has since 
been found by two collectors on other islands. There are herein indicated 
as endemic to Polillo only 14. species of flowering plants, to which a 
very few may subsequently be added. where the material is in the hands 
of specialists, or is insufficient for certain determination. None of the 
ferns are endemic, and with hardly an exception, they are of wide distri- 
bution. In the enumeration of the species, those that are known to be 
of general or wide distribution in the Philippines are merely listed. 
However, when the species has previously been collected on but few 
occasions, or when the collections, however numerous, seem to have been 
confined to definite regions, the range is given. 
It is from these cases of more or less restricted distribution that the 
most notable results of the exploration have been . obtained. Several 
such eases excited comment until it was found that with rare excep- 
tions they seemed to follow along definite lines. These indications have 
been investigated, with many species not collected' on Polillo, and con- 
firm the conclusions based on the species of that island, so that it, is 
possible to offer a somewhat definite theory, of distribution. 
The plants of the Benguet-Lepanto mountain region have' long been 
known to differ greatly from those of the less elevated provinces, and 
to find their allies on the higher mountains throughout the Archipelago, 
