592 ARTHUR: NEw UREDINEAE 
resemblance of the spores to those of some species of Ravenelia, 
The upward thickening of the walls, the distribution of color, 
pores and sculpturing, are characters when taken together that 
would indicate a member of the subfamily of Raveneliatae, but 
_ the family of the host is widely removed from any represented in 
that group of rusts. Its relationship is, consequently, problematical. 
Uredo inquirenda sp. nov. 
II. Uredinia amphigenous, scattered or in circinating groups, 
round, 0.5 mm. across, subepidermal, soon naked, dark cinnamon- 
brown, pulverulent, ruptured epidermis noticeable ; urediniospores 
oval or obovate, 18-23 x 28-36, wall cinnamon-brown, rather 
thin, I-1.5 4, somewhat thicker above, 1.5-2.5 4, evenly and 
strongly echinulate, pores 8, unevenly spaced in two zones of 4 
each, equidistant from the equator ; pedicels more or less persist- 
ent, slender, usually once or more length of spore ; paraphyses 
none, 
On undetermined plant, bearing the local name of ‘‘ Washing- 
ton Vine,” Auburn, Alabama, December 12, 1889, Geo. F. Atkin- 
son 1051. This species, like the preceding one, possesses the 
characters of the Raveneliatae, and for this reason has special 
interest. The rust appears to have been very abundant, all of the 
leaves of the collection being well covered with sori. The mate- 
rial came into my hands about three years ago among a lot of un- 
determined specimens, kindly sent from the herbarium of Cornell 
University for study. Since that time much effort has been 
expended to ascertain the probable identity of the host, but with- 
out making the slightest advance. Dr. E. M. Wilcox and Prof. J. 
F. Duggar of Auburn, Ala., have made inquiries and can find no 
trace of the original plant, or of any plant to which the name of 
“Washington Vine” is now applied. The collector is unable to 
recall any helpful information, and other botanists familiar with 
the southern flora do not recognize it. There are only individual 
leaves in the collection. These are 4-6 cm. long by I-2 cm. 
wide, rather thin, green both sides, smooth, entire, lanceolate, ses 
sile, or narrowed into short petioles. It is probable that the plant 
is not a native of the southern states, but has been cultivated for 
ornament, 
PuRCUE University, 
LAFAYETTE, INDIANA 
