346 BOTANICAL GAZETTE [MAY 
mental work necessary to establish the conclusions in reference to factors and 
adaptations remains to be done. 
Under “Flora” (pp. 200), 1058 native and introduced species are enumerated, 
representing 435 genera and ror families. Attention is called to the fact 
that the most striking feature of the flora is the large number of Gramineae, 
inosae, and Compositae, and the almost complete absence of Coniferae, 
Orchidaceae, Ericaceae, and Gentianaceae. New species are described under 
Picasa (2) and Vernonia (9), and a synopsis of the latter genus appears 
in an appendix. Several appendices, an elaborate summary, and a very full 
index show a real consideration for the convenience of the reader.—J. M. C 
tability.—Firrinc prepared, at the request of the editor of Ergebnisse 
der Physiologie i in 1905 an essay entitled Das Vorkommen von Reizlettungsvor- 
gingen bei den Pflanzen und die Methoden zu ihrem Nachweise, and in 1906 for 
the same work a second, Der Ablauj der Reizleitungsvorgdinge bei den Pflanzen. 
These essays are synoptical in their character and include extensive references 
to the literature of the subject, with the intention that these summaries might be 
useful to other physiologists as a source of information and to plant physiologists 
might serve as a starting-point for further investigations. Inasmuch as the wor 
in which they appeared has a rather limited circulation, especially among botan- 
ists, it seemed wise to the author to publish the two papers also as an independent 
physiological monograph; and in this form they do indeed make a small volume,3 
which can be had at a low price and thus becomes readily available. This work 
puts the facts of the matter succinctly, discusses the theories of conduction criti- 
cally though briefly, and therefore is likely to serve the very purpose which the 
author had in mind. The original separate publication has involved the reten- 
tion of the bibliography in two lists, largely duplicates; but this is a small incon- 
venience in view of the larger service.—C. R. B. 
German south-polar expedition.—Of the sumptuous quarto volumes reporting 
the results of this expedition in 1901-3, the seventh is devoted to botany. In the 
the first part, which has just been published,¢ HENNINGS reports upon the Fungi, 
describing over 30 new species (2 plates); ZAHLBRUCKNER treats the lichens, 
among which he finds 17 new species and a new genus, Steinera (Lichenaceae), 
and takes occasion to describe more fully a number of little-known species (3 
plates); ScHIFFNER lists the liverworts (of which about 40 were previously known), 
—— 3 a — and a new form out of the 14 collected (1 plate); BRoTH- 
61 mosses, of which 14 were new (3 plates); SCHENCK 
reports upon the vascular plants of each island, but finds no new species. 
3 Firtinc, Hans, Die aigomrer aia bei den oe Imp. 8vo. PP- 
oe figs. 15. Wiesbaden: J. F. Bergmann. naan M3 
utsche Sudpalar-Kapedition I9OI—1903, im so Sh des Reichsamtes des 
oe herausgegeben von ErIcH von Drycatski, Leiter der Expedition. VII 
pei Botanik. Heft 1. 4to. pp. 176. pls. 19. figs. 25. Berlin: Georg Reimer. 1906. 
M40. 
