Arthur: Cultures of Uredineae 
79 
as in the similar culture work of 1912, discussed above under 
number i. 
15. PucciNiA vuLPiNoiDis D. & H. — A Collection of this rust 
on Carex vulpinoidea (host determined by Dr. Theo. Holm) made 
by IMr. Overholts at Elkton, Ohio, was used to sow April 17 on 
Aster paniciilatus, A. Drummondii, SoUdago canadensis, S. gla- 
berrima {S. missouriensis of most manuals), 5 . Rugosa, and S'. 
mollis. There was no infection of Asters, but a most abundant 
infection of the four species of SoUdago, pycnia showing in each 
case April 27, and aecia May 7. 
Puccinia vulpinoidis.has been considered a distinctive and easily 
recognized species on account of the covered telial sori. A care- 
ful morphological study, chiefly by Dr. F. D. Kern, had shown 
however, that aside from this character the spore structure and 
range of hosts agree with P. Caricis-Solidaginis, or as we now say, 
P. extensicola, and to this morphological study was due the sug- 
gestion which led to the above successful cultures. The per- 
manently covered telial sorus must be considered in the light of 
this study to be associated with the structural peculiarities of the 
host, and not a character to be used without qualification. 
16. Gym NOSPORANGIUM CLAVARiAEFORME (Jacq.) DC. — Mate- 
rial on Juniperus sibirica, sent by Mr. Bethel from Tolland, Colo., 
was sown May 21 on Crataegus cerronus and gave rise to abun- 
dant pycnia June i, but no aecia matured.®* 
17. Peridermium fusiforme Arth. & Kern. — Through the 
kindness of Dr. F. A. Wolf of Auburn, Ala., typical material 
of this striking rust was received, gathered from a grove of 
Pinus taeda, which Dr. Kern and myself had visited in April, 
1912, and in which this form of Peridermium is very abundant. 
The first collection, sent March 22, 1913, was from a main stem 
an inch in diameter, the fusiform gall being one and a half inches 
in diameter at the middle, and six inches long. It was sown 
March 24 on two plants of Quercus rubra. Uredinia began to 
appear sparingly on one plant by April 3, but failed to appear on 
the other, although telia developed on both plants April 14, in 
ample and perfect development. 
3 * For previous cultures see Jour. Myc. 14: 19. 1908; Mycol. i: 239. 
1909; 4; 24. 1912; and 4; 56. 1912. 
