388 THE JOURNAL OF BOTANY 
pores notes about for years. Would not the general use of the 
onocarp”’ for annual or biennial yw matters greatly? 
I ors some facts. Do not all annuals become biennials if they 
cannot flower and produce seed in their first ¢ season ? 
experience generally and particularly. Is it not equally true that 
the further north you travel into the shorter arctic summer the 
except as a follower of man. Do not old-world weeds come out 
top in new lands, because they have “te ago adapted thertoulves 
by evolution to the environment caused by man ? Babe should we 
not recognise this as a law? If in ninety pe t. of cases the 
ant is a‘ o 
REVIEWS. 
Flora Z Cornwall : being an Account of the Floweri ing Plants and 
Ferns found in the County of Cornwall, including the Scilly 
Is By F. Haminron Davey, F.L.S. With six Portraits 
and a oars S ana Chegwiddin. 8yo, cl., pp. Ixxxviil, 
N this, the most ee ates to our local floras, we have 
the result of ten years’ stead 
who is not only personally ac uitted ith th I 
writes, but who has Gir 23 WE e region of which he 
— floras (Journ. Bot. 1902, 
ample evidence that the succeeding years h t 
the completeness of the work. Fe Bithigieg mors 
e Flora proceeds on the usual lines. It begins with an 
introduction of eighty-eight pages, in which are passed in review 
the topography, climate, and geology of the county; about half 
the space is devoted to the history of botanical research in Corn- 
