GLOSSARY OF BOTANIC TERMS 405 
occur in wind-pollinated flowers—e. g. grasses—excludes the action 
of — isitors as a universal cause. rite suggests that the 
frequency of ee inflorescences in grasses may be related to 
their stillakin on by the wind, but it is not ensy 6 regard this as the 
are or even as a very srt pootil 
st fascinating subject, and full of possi billtsed 4 is that of 
the third section (pp. 142-174): ‘‘ Differences in the formation of 
organs at different meted stages. Juvenile forms.” 
ma 
seed-plants ‘‘ the cotyledons which so i differ in form from 
the foliage-leaves are merely arrested forms of these, the arrest 
being sometimes permanent, sometimes reeier ray is a far too 
ibrar spoiler yi and leaves unexplained a very large number of 
cases. This section consists chiefly of a useful ea of a number 
of illustrative instances from different Sea -groups. 
‘* Malformations and their significance in pitt ai age AO ” is the 
subject of section iv. (pp. 177-202), the smallest of the five. The 
of plant-organs are based on differences in nutritive material, a 
theory which would be most difficult to prove, though it may afford 
a useful working hypothesis. 
The fifth and last eee be. 205-270), deals with ‘‘ the 
influence of correlation and e ernal formative stimuli upon the 
A. B. BR. 
A brace ‘y of Botanic Terms with their Derivation and Accent. By 
ngamiIn Daypon Jackson. 8yo, cloth, pp. xi, 827. Price 6s. 
Londos : Duckworth & Co. 
this volume, Mr. Jackson has given us another C those 
results of a industry with which his name is associated— 
value to 
Jackson has suppli ed nd cig wantin, 
r. Jackson’s preface is at once mae } infor orming and so modest, 
