A DISEASE OF PINES CAUSED BY CRONARTIUM PYRIFORME. 6 
fig. 4) from Colorado, some of the asciospores are very short and 
slightly acuminate, while many are ellipsoid or even globoid (PL I, 
fig. 3). In specimens on Pinus pungens from Pennsylvania many of 
the spores are nearly twice as long as those from Pinus contorta, 
the acumination is very marked, and the spores are rarely ellipsoid 
(PI. I, fig. 2). 
Peck's type material of Peridermium pyriforme is in the New 
York State Museum, at Albany, N. Y. It consists of a split branch 
4 cm. long, 1 cm. thick at one end and 0.5 cm. thick at the other; 
the weak, fragile peridia barely protrude beyond the bark. The 
split surface of the twig is glued to the yellow paper bearing one of 
the legends. The specimen is in fairly good condition and most of 
the essential characters, both macroscopic and microscopic, can be 
determined from it. What appears to be the other half of this speci- 
men is at the New York Botanical Garden, Bronx Park, N. Y. ; but 
it is much insect eaten and but little can be determined from it. 
The type material at Albany bears the following legends on the 
box: "Peridermium pyriforme, Newfield, N. J. Ellis #2040." On 
the original wrapper is "Peridermium pyriforme on pine limbs in 
the spring, Newfield, N. J. .0015-.0025. No. 2040 Ellis." This 
legend is in two parts. The name is in Peck's handwriting, with a 
drawing of a spore and size of spores in pencil, while the host, loca- 
tion, and number of the specimen are in ink and are in Ellis's hand- 
writing. The word "type" is not in the original legend. The fol- 
lowing is Peck's original description of Peridermium pyriforme (10) 
and his remarks on the same: 
Peridia erumpent, large, white when evacuated, the cells subrotund, with a paler 
margin, marked with radiating striations, spores obovate, pyriform, or oblong- 
pyriform, acuminate below, .0015-.0025 inch long. 
Bark of pine branches. The specimen is labeled "Newfield, N. J.," but Mr. Ellis 
informs me that it may have been collected in Georgia and placed by accident among 
his New Jersey specimens. 
In the dried specimens the peridia are mostly compressed, about one-fourth of an 
inch long, and scarcely exserted above the surface of the bark. The spores are pale 
yellow, but probably they are more highly colored when fresh. The acumination is 
generally acutely pointed, and it is sometimes so elongated as to make the spore 
appear clavate. It is one of the most distinctive features of the species. 
SYNONYMY AND DESCRIPTION OF THE FUNGUS. 
Cronartium pyriforme (Peck) Hedge, and Long, 1914, Alternate Stage of Peridermium 
Pyriforme. 
Cronartium asclepiadeum thesii Berk., 1845, in Lond. Jour. Bot., v. 4, p. 311. 
Peridermium pyriforme Peck, 1875, in Bui. Torrey Bot. Club, v. 6, No. 2, p. 13. 
Caeoma comandrae Peck, 1884, in Bui. Torrey Bot. Club, v. 11, No. 5, p. 50. 
Cronartium thesii (Berk.) Lagerh., 1895, in Troms0 Mus. Aarsh., v. 17, p. 94. 
Peridermium betheli Hedge, and Long, 1913, in Phytopathology, v. 3, No. 4, p. 251. 
Pycnia unknown. 
