82 ERYTHEA. 
smaller irregular groups, which often extend along the veins. 
Pseudoperidia short, on the petioles oblong, with white torn 
edges. Aucidiospores subglobose or elliptical, with colorless 
verrucose membranes, 19-30 x 15-20u. Uredo and teleuto- 
spores: sori mostly hypophyllous and on the stems, of 
different size, scattered or confluent, when occurring on the 
stems and petioles, to large patches; dark brown, pulveru- 
lent. Uredospores shortly elliptical or globose, 25-28 x 22- 
274, brown, membrane thick, echinulate. Teleutospores 
mostly elliptical or obovate, generally rounded above, some- 
times attenuated below, usually without apical thickening, 
verrucose, chestnut brown, 30-50 x 22 x 294. Pedicels color- 
less, short, deciduous. 
On Viola lobata. Dunsmuir, Cal., May, 1894, leg. Holway; 
on Viola ocellata, Ukiah, Cal., May 22, 1894, leg. Holway 
and Blasdale. 
In its general appearance the fungus is somewhat different 
on both the host plants, but in the microscopical characters 
of the spots the agreement is complete. 
REVIEWS AND CRITICISMS. 
A Handbook of Systematic Botany. By Dr. E. Warmine, 
Professor of Botany in the University of Copenhagen. 
Translated and edited by M. C. Porrsrr, M. A., F. L.8., 
Professor of Botany in the University of Durham, Col- 
lege of Science, Newcastle-upon-Tyne. 8 vo., pp. XII, 
620. London: Swan Sonnenschein & Co.; New York: 
Macmillan & Co. 1895. 
The new Warming-Potter text-book is one that cannot 
fail to be of much use and interest to the general student of 
botanical science. Taken all in all, the work probably gives 
one a better conception of our present knowledge of plant- 
relationships than any other now before the public. The 
