236 
Diosevrea. Herr. P. Hennings describes new species of fungi in — 
the genera Uromyces, Puccinia, Hymenochate, Cladoderts, Poly- 
porus, Phyllachora and Helotium. 
Practical Studies in Biology. I. The Potato. H. L. Osborn. 
(Amer. Month. Micros. Journ. xiii. 85-88; 105-110; 
illustrated). 
Revision of the American Species of Rumex Occurring North of 
Mexico. Wm. Trelease. (3rd Ann. Rep. Missouri Bot. 
Gard. 74-98; plates 13-33; reprint). 
Prof. Trelease recognizes twenty species of the genus within 
the area. 2. paucifolius, Nutt.. becomes R. Geyeri (Meisn.) the 
older name; &. Arizonicus, Britton, is referred to R. hymenosepalus, 
Torr. in which reduction we have no doubt he is in error, and 
all the North American plant which has gone as &. maritimus, 
is referred to R. persicariodes, L. The paper is illustrated by 
twenty plates, and will greatly facilitate the determination of these 
plants. N. L. B.- 
Resirepia striata. J.T. Hooker. (Curt. Bot. Mag. xlviii. tab. 
7233). 
Sereno Watson. John M. Coulter. (Bot. Gaz. xvii, 137-141 
with portrait and interior view of the herbarium of Harvard 
University). 
Spir@acee—On Certain. Edward L. Greene. (Pittonia, ii 
219-222), : 
Lutkea Hendersonii, from the Olympic Mts., Washington, B 
characterized as new. Professor Greene maintains Spir@a 
rymbosa, Raf., S. lucida, Dougl. and S. pyramidaia, 0. Sp. all as 
distinct from the Siberian S. Jetu/efolia, Pall., to which he refers 
as American only a specimen from Alaska. 
Systematische Stellung der Gattung Thorea, Bory. ¥r. Schmitz. 
(Ber. Deutsch. Bot. Gesell. x. 11 5-143). 
Tertiary Fossil Plants Strom Potosi, Bolivia. N. L. Britton. 
(Trans. Amer. Inst. Mining Engineer, Plattsburgh, Meeti"® 
June, 1892; Contrib. Herb. Col. Coll. No. 27, Reprint, PP 
10; 79 figures), : 
