CLINTON: NORTH AMERICAN USTILAGINEAE. 
375 
by Winter and as issued in Rab. Fungi Eur., 1099. While the 
germination of this species, apparently, has not been described, 
Cocconi has described that of Ustilago Ornithogali, which is of 
the Ustilago type. 
* * Spores golden. 
Ustilago Vaillantii Tul. 
Ustilago Vaillantii Tul., Ann. Sci. Nat., Bot., hi, 7: 90. 1847. 
Sori in anthers and other essential organs, filling the floral envel¬ 
opes with a dusty dark olive mass ; spores variable, golden brown, 
ellipsoidal to spherical, smooth, but inner wall apparently obscurely 
echinulate, chiefly 7-12 g in length. 
Host: Scilla praecox, Mass. 
This European species, so far as the writer is aware, has been 
collected in North America only in the vicinity of Boston, where it 
was found on cultivated species of Scilla. It is not unlikely that it 
occurs elsewhere but has escaped attention. Among the older spe¬ 
cies this is one of the very few that have not been encumbered with 
a number of synonyms. Schroter and Brefeld have described its 
germination. 
Ustilago Oxalidis Ell. & Tr. 
Ustilago Oxalidis Ell. & Tr., Journ. Myc., 6 : 77. 1890. 
Exsiccati: Ustilago Oxalidis Ell. &Tr., on Oxalis stricta . Ell. & Ev., N. A. 
Fungi, 2424, Ell. & Ev., Fungi Col., 470, Rab.-Wint.-Paz., Fungi Eur., 4007, 
Seym. & Earle, Econ. Fungi Clinton Ust. Supp., C 79, C 80. 
Sori in the seeds, inconspicuous (affected ovaries scarcely differ¬ 
ing from the normal except on dehiscence showing more or less of 
the seeds changed into reddish brown dusty spore masses slightly 
larger than the uninfected seeds); spores golden yellow, chiefly 
ovoid to spherical, occasionally more elongated or irregular, coarsely 
verrucose, 13-20 g in length. 
Host: Oxalis stricta , Conn., Ia., Ill., Ivans., Miss, (type), Mo., 
N. Y., Wise. 
In the study of this species the writer has found that the stamens 
of the infected flowers contain what appears to be a conidial stage. 
This forms ovoid to subspherical, hyaline, thin walled conidia in 
