Davis—Parasitic Fungi in Wisconsin — I. 
89 
sporules in a discoid layer 100-150/* broad which is covered by 
a chitinoid, pundulate clypeus which becomes irregularly fis¬ 
sured; sporules straight or allantoid, 6-10 x %-l%/*. North 
American Fungi 674 on Betula lent a, collected by Nuttall in 
West Virginia, shows faded leaves with circular green areas. 
The pycnidia, however, are by no means confined to the green 
spots. In the West Virginia specimens also the sporules are 
smaller than in the type as described. I assume that it repre¬ 
sents it in its Sacidium structure. Perhaps this is not distinct 
from Leptothyrium betulae Fckl. 
(This has since been collected on the same host at Wausaukee.) 
A Gloeosporium which has appeared in the greenhouse of the 
botanical department at Madison on the leaves of Dendrobium 
moschatum causes orbicular arid spots about 1 cm. in diameter 
with a dark purple border and elevated margin. The acervuli 
are brown, scattered, mostly epiphyllous; the sporules oblong 
to ovate-oblong, obtuse at both ends, biguttulate, KKL5x4/*. Prob¬ 
ably this is Gloeosporium cinctum B. & C. and perhaps also Gl. 
pallidum Karst. & Har. The studies of Shear and Wood, how¬ 
ever indicate that it is a conidial condition of Glomerella cingu- 
lata (Stonem.) S. & V. S. (U. S. Dept, of Agr., B. P. I., Bull. 
252). 
Colletotrichum helianthi n. sp. Spots definite, orbicular, 
olivaceous with a cinereous center and a black margin, paler be¬ 
low, often confluent, 3-5 mm. in diameter; acervuli very promi¬ 
nent, one or few on a spot, 50-65/* broad, surrounded by black 
rigid bristles 80-150x3-5/* which taper from base to apex; spor¬ 
ules hyaline, fusiform to arcuate, nucleolate, acute at each end, 
25-35x2%-3%/*. On Helianthus sp. indet. Madison, Wisconsin, 
July 7, 1907. This is allied to C. solitarium Ell. & Barth, from 
which it differs in the larger bristles and sporules. I found the 
specimen in the herbarium of the University of Wisconsin with 
the name of the collector not given 
Ovularia asperifolii Sacc., var. lappulae n. var. Spots sub- 
orbicular, dark brown, %-l cm; conidiophores hypophyllous, 
scattered or in tufts of 2—4, hyaline, often toothed, usually 16- 
20x3-4/*; conidia in chains which are sometimes branched, hya¬ 
line, 6-18x3-4^; the lower conidia are cylindrical, acute at each 
end, 12-18x3-3%/*, the upper fusoid, 6-12x3-3%/*. Much 
