New species of fungi 
CoRNELIUS Lotr SHEAR 
The following fungi appear to be undescribed. Most of them 
have been discovered during our studies of the fungous diseases of 
the cranberry. Type specimens of all are deposited in the patho- 
logical collections of the Department of Agriculture. 
Ozonium omnivorum sp. nov. 
No fructification definitely known. Sterile mycelium usually 
a dirty yellow, sometimes whitish when young or growing in cul- 
tures or in the vessels of vascular bundles of plants ; hyphae form- 
ing strands and spreading from them, producing a rather dense 
arachnoid layer on the surface of the host and bearing I to 4 
branches arising and growing at right angles from the same point 
near the ends, diameter 3-5 », tapering toward the ends. 
Type, xo. 1447 C. L. S., on cotton root, Petty, Texas, Sept. 2, 
1905. The fungus occurs from eastern Texas to southern Cali- 
fornia and has also been found in southern Oklahoma and Indian 
Territory. This fungus is a facultative parasite infesting the soil 
and attacking the roots of a great variety of plants and causing 
serious damage to cultivated crops, such as cotton, alfalfa, cow- 
peas, sweet potatoes, beets, and fruit trees. Few crops except 
Stasses and grains are free from it. The fungus was described 
and figured by Pammel * who called it Osonium auricomum Link. 
Having had an opportunity to examine Link’s type at Berlin, we 
are convinced that this fungus is quite different from his. 0. auri- 
¢omum Link is somewhat similar in color but has a much coarser 
and looser mycelium, and lacks entirely the slender tapering 
branches arising at right angles which are so characteristic of O. 
omuivorum. O. auricomum occurs in Texas, but so far as observed 
only as a pure saprophyte. Owing to the important economic 
relations of this root-rot fungus, it seems desirable to give it a 
Specific name, even though its fruiting formis not known. We 
* Ann. Rep. Texas Agr. Exp. Sta. 2: 61 et seq., p/. 2, 3. 1889. 
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