No. 5.] ‘- USTILAGINE OF CONNECTICUT. 31 
Urocystis Rab. 
The sori usually occur in the leaves or stems, where they 
often cause considerable distortion, or more rarely in the 
floral parts, and form dark colored, dusty spore masses. The 
spore balls are permanent, composed of an enveloping cortex 
of tinted sterile cells, enclosing one to several spores, and are 
of small to medium size. The spores are reddish brown, and 
of variable shape and size. Figs. 14, 15, 41, 42. 
The sori of this genus look very much like those of Usti- 
lago. Saccardo in his Sylloge Fungorum describes 34 spe- 
cies; I2 of these occur in North America, and 4 have been 
listed from this state. A few of the species are of some 
economic importance. 
Key to Species of Urocystis. 
I. Spore balls usually with 1 fertile cell, rarely with 2; 
sori forming extended outbreaks on leaves and 
GODS. cgece saunas eaccinnehame ceo eactaaenes U. Cepule. 
II. Spore balls usually with 1 or 2 fertile cells, rarely 
with 3 or 4. 
A. Sori forming pustular or irregular swellings 
on leaves and stem.............. U. Anemones. 
B. Sori in striz usually on under side of leaf 
sheath) 4.ccnceowne ni ceees oa see in wes U. occulta. 
III. Spore balls usually with 3 to 5 fertile cells, rarely 
with more; sori oblong in base of flowers...... 
U. Hypoxyis. 
Urocystis Cepulz Frost. Figs. 14, 42. The sori occur 
in the leaves and bulbs as isolated pustules or often as more 
extended areas, and are at first covered by a thin plant mem- 
brane, but eventually rupture this, disclosing a black, dusty 
spore mass. The spore balls are ovoid to spherical, small, 
17-25u in length, and contain one or rarely two spores.’ The 
sterile cells are tinted, ovoid to spherical, small, 4-84, and 
rather completely cover the spores. The spores are reddish 
brown, ovoid to spherical, and chiefly 12-16 in length. 
Host and Distr.: Allium Cepa, Green’s Farms, June, 
