274 Lichenes. — Bryophyten. — Pteridophyten. — Floristik etc. 



auspices of the Geological and Natural History Survey of Minne 

 sota in the six years from 1896—1902. It is a complete manual 

 and contains 267 pages and 51 excellent plates of all the lichens 

 known to occur in the State of Minnesota. The manual begins 

 with a general discussion of lichens and 36 pages are devoted to 

 the views held as to their origin and as to the nature of the algal 

 and fungal symbionts, the morphology and reproduction of the 

 group and some facts regarding their economic importance. The 

 main body of the work includes descriptions and a record of the 

 distribution of upwards of 350 species and varieties, representing 

 67 genera. Füll keys to the genera and species are included. 



The Classification adopted follows in the main that of Zahl- 

 bruckner in Engler and Prantl, although in the sequence of the 

 genera several departures from that Classification are noticeable. No 

 attempt has been made to indicate the relationships of the different 

 families to the families of the ascomycetous fungi. 



The number of new species described is surprisingly small 

 when one considers the extent of the work and the many years 

 of close acquaintanceship that the author has had with the lichens. 

 The descriptions are füll and complete, especial attention being 

 given to the size of the thalli — a point which the author points 

 out as being generally neglected in current liehen descriptions. No 

 attempt has been made toward a final arrangement of the synon5^m3^ 

 of the genera and species treated. In cases where a species has 

 been transferred from the genus in which it was originally placed 

 to another genus, the old combination is reproduced together with 

 the proper citation. 



An extended bibliography is appended containing more than 

 260 titles. This part of the work was compiled by P. L. Ricker of 

 the United States Dept. of Agriculture. 



While the avowed scope of the work is restricted to the State 

 of Minnesota, the manual will be found especially serviceable to 

 students of lichenology throughout the northern United States 

 and will not be without value to any American Student of this 

 difificult group of fungi. L. O. Overholts. 



Cooper, W. S., A List of Mosses collected upon Isle 

 Royale, Lake Superior. (Bryologist XVI. p. 1—8. Jan. 1913.) 



The list includes 106 species of mosses, the habitat of which 

 is given, as a matter of ecologic interest. Harshberger. 



Schaffner, J. H., An undescribed Equisetum from Kansas. 

 (Ohio Nat. XIII. p. 19—21. 1912.) 



Contains description of Equisetum Kansanum. 



J. M. Greenman. 



Adamaon, R. S,, Plants from Western China. (Journ. Bot. 

 LI. nO. 604. p. 129—131. 1913.) 



A list of the plants collected by F. K. Ward in China in 

 1909 — 10. There are five new species of which 3 are here described 

 Tiz. Gueldenstnedtia flava, Vacciniuni Wardii and Jasminuin Wardii. 



M. L. Green (Kew). 



