468 GRAFF: PHILIPPINE BASIDIOMYCETES 
There are two varieties of Polystictus tabacinus, which represent 
two different sorts of development and variation from the type. 
The first variety, barbatus, does not vary in pilear texture but in 
the fact that the upper surface is covered with a long tomentum, 
and has a somewhat darker shade of color. This tomentum varies 
in length from short, at the outer margin, to about 3 mm., near 
the place of attachment of the fungus. 
In the case of the second variety, substygius, the variation is 
one of which insufficient notice has been taken; namely, a tendency 
toward the assumption of a perennial development in an occasional 
species, which is typically annual, when growing under the warm 
conditions of a tropical climate. This second variety has de- 
veloped in this manner. The context of the plant develops much 
thicker and harder than normally. The upper surface loses its 
characteristic velvety tomentum, becoming hard and smooth. 
Otherwise than this the plant retains its usual characters. To one 
unfamiliar with the variations through which this plant may pass 
the natural tendency would be to place it in the genus Fomes. 
While pore layers have been occasionally observed in this variety 
they are the exception rather than the rule. 
Fomes spadiceus (Berk.) Cooke is not this species, but a quite 
distinct plant. 
Reported from Samoa, the Philippines, Malacca, and the East 
Indies. 
TRAMETES Fries 
TRAMETES ELMERI (Murr.) Graff, Philip. Jour. Sci. 9: Bot. 243. 
I9I4. 
Tyromyces Elmeri Murr. Bull. Torrey Club 34: 475. 1907. 
Polyporus Elmeri Sacc. & Trott.; Saccardo ,» oyll. Fung. 21: 279. 
1912. 
Luzon: Province of Bataan, Mount Mariveles, November, 
1904, Elmer 6954, on dead wood. 
The generic characters of this fungus are those of Trametes 
rather than Polyporus. Saccardo evidently made the change on 
general principles rather than after a critical study of the species. 
As yet collected only in the Philippines. 
TRAMETES INSULARIS Murr. Bull. Torrey Club 35: 405. 1908. 
Luzon: Province of Benguet, Baguio, April, 1909, R. C. Me- 
Gregor, Bur. Sct. 8311, on Pinus insularis Endl. 
