Arthur and Kern: North American Peridermium 115 
aeciospores ovoid or cuboidal, 19-21x21-28 /x, the wall 1.5-2 /x, 
finely and evenly verrucose. 
On Pinus rigida Mill., Connecticut {Clinton), Maryland {Hcdg- 
cock & Long, see Mycologia 4: 282. 1912), Massachusetts {E. 
T. Bartholomew in Barth. N. Am. Ured. 720). 
On Pinus sp., Florida (Holway in Barth. N. Am. Ured. 5/7). 
Type collected at St. Augustine, Florida, on Pinus sp. (doubt- 
fully P. Taeda) March 27, 1903, E. W. D. Holway. 
Distribution: Atlantic coast from Massachusetts to Florida. 
The telial collections range from Maine to Kansas southward to 
West Virginia and Texas, but have not been found in the south- 
eastern part of the United States. 
This species stands apart from the other foliicolous species on 
pine on account of the short, fragile peridium and the small, 
quadrilateral peridial cells. Per. inconspicuum, since described 
by Long, has a peridium which resembles this species in being 
rather short and delicate, but differs in having larger, thicker- 
walled peridial cells of an oblong shape. The range for the species 
has been extended northward along the Atlantic coast as far as 
Massachusetts, but when careful search is made for it, the range 
will doubtless be found much greater. 
Clinton (Rep. Conn. Exp. Sta. for 1912, p. 353) made observa- 
tions in the field which led him to think that the telial stage of this 
form occurs on Euthamia, and recently confirmatory cultures have 
been reported by Hedgcock and Long (Phytopath. 3 : 250. 1913). 
The species apparently has distinctive microscopic characters, and 
is to be called Coleosporium delicatulum (Arth. & Kern) Hedg. & 
Long, Phytopath. /. c. 
2. Peridermium inconspicuum Long, Mycologia 4: 283. 1912 
0. Pycnia 0.2-0.3 mm. broad by o. 3-0.7 mm. long, low-conoidal, 
85-120 yu, high. 
1. Aecia flattened laterally, 0.3-0.7 mm. long, by 0.3-0.8 mm. 
high ; peridial cells oblong in face view, 19-27 x 38-55 /x, over- 
lapping, the side walls 3-4 /x thick, the inner wall rather finely and 
closely verrucose with uniform papillae; aeciospores ellipsoid, 
16-18x22-30 /x, the wall 1.5-2 /x, finely and very closely ver- 
rucose. 
On Pinus virginiana Mill., Maryland ( Charles ; Long, June 16, 
1912). 
