if 6 Review: 
8. Ferguson, M. C. “The Development of the Pollen-tube and the Division 
of the Generative Nucleus in Certain Species of 
Pines.” Ann. Bot. XV. 1901. 
9. Goebel, K. “ Organography of Plants.” 1900. 
10. Jiiger, L. “ Beitriige zur Kenntniss der Endospermbildung und zur 
Embryologie von Taxus baccata .” Flora 8b. 1899. 
11. Lawson, A. A. “ The Gametophytes, Fertilization and Embryo of 
Cephalotaxus drupacea. Ann. Bot. 21. 1907. 
12. ,, ,, “ The Gametophytes, Archegonia, Fertilization, and 
and Embryo of Sequoia seinpervirens .” Ann. Bot. 
XVIII. 1904. 
13. Miyake, K. “ Contribution to the Fertilization and Embryogeny of Abies 
balsavia." Beihefte zum Bot. Cent. XIV. 1903. 
14. ,, “ On the Development of the Sexual Organs and Fertili¬ 
zation of Picea excelsa .” Ann. Bot. XVII. 1903. 
15. Robertson, A. “Studies in the Morphology of Torreya calipornica, II.” 
New Phytologist, Vol. III. 1904. 
16. ,, ,, “The Taxoidese: A Phylogenetic Study.” New Phyto- 
logist, VI., 3 and 4, 1907. 
17. Strasburger, E. “ Uber das Verhalten des Pollens und die Befruchtungs- 
vorgange bei den Gymnospermen.” Hist. Beit. 4. 
1892. 
REVIEW. 
Plant Physiology and Ecology, by Frederic Edward 
Clements, Ph.D., President of Botany in the University of 
Minnesota. 315 pages, 125 Illustrations. London, 1907. 
P ROFESSOR CLEMENTS is one of the clearest and most 
logical exponents of ecology, and any contribution to the 
subject by him is worthy of earnest consideration. A great deal of 
the substance of the work now under review has already appeared 
in his “The Development of Vegetation” (1904) and also in his 
“Research Methods in Ecology” (1905). The latter work was 
reviewed in these columns at some length by Dr. F. F. Blackman 
and Mr. A. G. Tansley. 1 The present text has been largely based on 
the two earlier works, though most of the matter is new or re-written, 
and, to a fairly large extent, re-arranged. The plant is first 
considered as an individual, with respect to factor, function, and 
form, and then as a member of a plant group. “ The book is 
intended for use with classes in second-year botany in College and 
1 New Phytologist, Vol IV. 1905. 
