374 BOTANICAL GAZETTE | NOVEMBER 
is used in the arts. A seventh chapter (incomplete) is to describe the micro- 
scopic characters of the most widely used woods. — B. 
THE LAST ISSUE of the Minnesota Botanical Studies (2:537-655. 1901) 
contains the following papers: E. M. FREEMAN, ‘A preliminary list of 
Minnesota Uredineae,” a little over 100 species being included ; DEALTON 
AUNDERS, “A new species of Alaria,” from the Californian coast; F. 
BuTTen, “A preliminary list of Minnesota Xylariaceae,” including 19 
species; W. A. WHEELER, “A contribution to the knowledge of the flora of 
the Red river valley in Minnesota,” 325 species being listed, with eight 
excellent heliotype plates of plant formations; H. B. HUMPHREY, “ Observa- 
tions on Gigartina exasferata Harv.,” a histological study, with one helio- 
type plate; W. G. FANNING, “Observations on the algae of the St. Paul city 
water;’’ W. A. WHEELER, “Notes on some plants of Isle Royale;” D. 
LANGE, “Revegetation of Trestle island;” J. C. ARTHUR and E, W. D 
Hotway, “Violet rusts of North America,” with one plate; H. L. LYON, 
“ Observations on the embryogeny of Nelumbo ” with three plates, reviewed 
in the BOTANICAL GAZETTE for October.—J. M. C 
THAT FIRES are not always so detrimental as they seem is disclosed by 
a reading of the second edition of the phytogeography of Nebraska.” The 
first edition has been reviewed in this journal,’* and a statement as to the new 
material is all that is needed here. A comparison of the two editions shows 
that the entire book has been essentially revised and brought up to date, 
although the table of contents reads much the same in the two editions. 
Among the more important additions are a full discussion of methods for the 
determination of the frequence and abundance of species, a brief treatment 
of the primitive flora of the great plains, and the treatment of floral and 
vegetation elements and of accessory biological characters. Throughout the 
detailed chapters on the formations, much new material, the result of three 
years’ further labor, is added. In the review of the first edition, the impor- 
tance of this contribution to ecological workers was stated. Now that the 
book has been in actual use for four years, it is possible to speak yet more 
highly of its value. It is not too much to say that it is the most important 
valuable work that has yet appeared in the field of American phyto- 
eography.—H. C. CowLeEs. 
NOLES FOR-STUDENTS. 
S. YAMANoUCHTI™ has described and figured bodies in the dividing pollen 
mother cell of Lilium longiflorum, which stain deeply, are centers of radia- 
*PounD, Roscoz, and CLEMENTS, FREDERIC E.—The ee ot 
Nebraska, I. General Survey. 8vo. pp. 442, with four maps. Lincoln, Nebras 
The University Publishing Co. 1900. Second edition. 
™ Bor. GAZ. 25 : 370. 1898. 
™Einige Beobachtungen iiber die Centrosomen in den ee von 
Lilium longifolium. Beihefte Bot. Centralbl. ro: 310-303. pl. z. 1901 
