316 BOTANICAL GAZETTE [area 
1902) has described new species of Aster, Gnaphalium (2), and Amica (4) 
from the northwest.—F. V. CovILLE (Proc. Biol. Soc. Washington 15 :2}- 
29. 1902) has discussed the confused synonymy of Rides aureum and R. 
entum.—C. L. POLLARD (Torreya 2 :24-25. 1902) has described a new violet 
from New Jersey, and also (Proc. Biol. Soc. Washington 15 : 19-21. 1902) 
five new American species of Chamaecrista.— R. S. WILLIAMS (Bull. Tort. — 
Bot. Club 29 : 66-68. f/s. 4-5. 1902) has described new western species of 
Eurhynchium and Brachythecium.— CHARLES H. Peck (idem 69-74) has 
published thirteen new species of fungii—ALICcE Eastwoop (idem 75-82. 
pls. 6-7) has described new Californian species of Fritillaria, Monotropa, 
Cycladenia, Potentilla, Orthocarpus, Spraguea, Sidalcea, Stachys, and Ts 
folium.— W. H. Lone, Jr. (édem 110-116) has described seven new Texan 
species of Puccinia, with illustrations. —F. GAGNEPAIN (Bull. Soc, one 
France IV. 1: session extraordinaire LXXIX. 1go1) has published a new 
genus (Au/otandra) of Zingiberaceae.—J. M. C. a 
CowLEs,” in a very comprehensive paper, gives the results of his observa 
tions on the influence of rocks on vegetation. The physical and 
initial stages of erosion, and consequently the plants will be: om 
the last stages of the life history the plants and conditions will be 
same. “The vegetation of all hills in a given region, of whatey oe 
or physical nature, is tending toward an ultimate common destiny, 
most parts parts of the United States is the mesophytic forest "9" 
sion of plant societies is sometimes slow and sometimes fast, ened 
have at any given period before the ultimate stage is reached a . 
soils. Were the stages equally rapid in all cases, there would be 
_ differences.” : ness : 
The author’ i i - made on granite») © 
uthor’s researches comprise studies” eee 
: basalts, etc., in northern Michigan and in Connecticut, on quate" 
__ ®Cowzzs, H. C., Contributions from the Hull botanical laboralor? 
ae Bull. Am. Bureau Geog. 2 : 163-176, 376-388. 1901. oe 
