No. 377] REVIEWS OF RECENT LITERATURE. 373 
degraded form, the author’s belief being that the simplicity of its 
flowers is really primitive. 
In a paper in the Videnskabelige Meddelelser of the Copenhagen 
Natural History Society for 1897, Dr. V. A. Poulsen, whose work in 
this field extends over many years, publishes a paper dealing with 
the extrafloral nectaries of Excecaria, Fragraea, Vaccinium, and 
Shorea. 
Professor Hitchcock, who is giving more time to cecological studies 
than most Experiment Station botanists appear to find time for, pub- 
lishes as Bulletin No. 76 of the Kansas Station at Manhattan a well- 
illustrated paper on “The Vegetative Propagation of Perennial 
Weeds.” 
Professor Pammel, whose work on the seedcoats of Leguminosz 
and Euphorbia is well known, issues as contribution No. 6 from the 
Botanical Department of the Iowa State College a paper on the 
seeds and testa of some Crucifere, reprinted from the American 
Monthly Microscopical Journal. The paper is freely illustrated by 
figures showing the macroscopic appearance and microscopic struc- 
ture of the seeds studied. 
Dr. F. Hock, Oberlehrer in Luckenwalde, has recently published 
a concise elementary treatise on botanical geography. 
Under the title “ A First Ohio Weed Manual,” Professor A. D. 
Selby publishes an instructive discussion of the weed question in 
general and a descriptive illustrated list of Ohio weeds. 
Lathyrus splendens, a beautiful species of Southern California, is 
figured in the Gardeners’ Magazine for February 12. 
Vanilla is considered with respect to its botany, cultivation, micro- 
scopy and chemistry in the Journal of Pharmacy of New York for 
February. 
The principal weeping willows form the subject of an instructive 
article by A. Rehder in Moeller’s Deutsche Gartner-Zeitung for Feb- 
ruary 19, in which good figures are published of Salix elegantissima, 
S. alba vitellina pendula, S. blanda, and S. salomoni. 
1 Höck, F. Grundzüge der Pflanzengeographie. Unter Rücksichtnahme auf den 
Unterricht an höheren Lehranstalten. Breslau, Ferdinand Hirt, 1897. 190 pp., 
50 ills., 2 maps. 
? Ohio Agricultural Experiment Station, Bulletin No. 8&3. Wooster, Ohio, 
September, 1897. 8vo, 249-400 pp., 71 ills. 
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