118 THE JOURNAL OF BOTANY 
the gradual development of modern views of morphology; the mor- 
phology of the flower; taxonomy—a concise but very condensed 
account of np work ze the ee d; and paleobota anys which has 
are the pee of the other tw reen is naturally more at 
home in plant physiology, ga. “Book u1., Which deals with this 
aspect of the science, occupies about one half of the entire volume 
It includes eleven chapters which form an excellent résumé of 
k of the period. At +6 end of the book there 
eee RY of works to which reference has bee desiande in the 
As a whole the new History of Botany is a careful, well- 
prernsl and eminently readable etek of the progress of botany 
from 1860 to 1900, and should rank as not the least useful of Dr. 
Green’s numerous and valuable Bia taisioitis to botanical literature. 
BOOK-NOTES, NEWS, ée. 
At the meeting of the Linnean Society on February 17th, 
1910, pa W. T. Saxton gave an account of his recent investiga- 
tions upon the anatomy of the genera Widdringtonia Endl. an 
Callitris Vent. Evidence was brought forward - show (1) that 
type; (2) that Widdringtonia cannot be maha in the genus 
Callitris, but must rank as a distinct genus. (1) The chief points in 
which these two genera differ ie the Cupressine@ are as 
follows :—(a) the position of the archegonia. In Cupressinee 
these are found at the apex of the iio Dial i Widdringtonia and 
Callitris never at the apex; (6) the Neesrrgerne prothallus cells ; 
() the development of the proembryo. LHight free nuclei are 
rmed in these genera and the piseMeys fills the archegonium ; 
(a) at least three embryos may be formed from a arc proembryo. 
Callitrinee wee: su moe? as a tribal nam i hese two 
oO 
the nucellus. In Callitris about pee such cells are found, half 
way,up the na ; (6) the number and arrangement of the 
archegonia differ materially in the two genera ; (c) the mic ees we 
phyll normally forse four sporangia in Widdringtonia, three 
the bo pits i 
of Callitris; these are not found in Widdringtonia 
