344 BOTANICAL GAZETTE [may 



volume has now appeared.^ The twenty-five species illustrated include six new 

 species of Crataegus from Missouri, and new species from China or Japan under 

 Ulmus, Berberis, and Viburnum (3), Four new species of Lonicera from China 

 are described without illustration by Rehder, who also describes and illustrates a 

 new hybrid under Mains. The tropical American (Florida and Mexico to Central 

 America) species illustrated are Alvaradoa amorpJioides Liebm., Pinus Grcggii 

 Engelm., and P. Lumlioltzii Robinson and Fernald. The ten remaining species 



w 



are from China or Japan, and belong to Berberis, Acer, Rhododendron, Viburnum 

 (5), and Lonicera (2), — J. M. C. 



Plant phyla. 



upon a 



natural (evolutionary) classification of plants, and the result has just appeared in 

 published form. He recognizes fifteen great *' phyla," and presents a diagram 

 to illustrate their relationship. It is impossible to give any adequate conception 

 of the scheme, for it is very compactly presented and includes an enormous mass 

 of details. A glimpse of the point of view may be obtained from the following 

 list of the "phyla," the number following each name indicating the number of 

 families included: Myxophyceae (9), Protophyceae (17), Zygophyceae (21), 

 Siphonophyceae (18), Phaeophyceae (23), Carpophyceae (26), Carpomyceteae 

 (145), Br}'ophyta (54), Pteridophyta (13), Calamophyta (4), Lepidophyta (7), 

 Cycadophyta (9), Gnetales (i), Strobilophyta (9), Anthophyta (280). The labor 

 involved in organizing and defining these (536 families must have been enormous. 

 J. M. C 



American Breeders* Association.— The literature of breeding which is now 

 growing with great rapidity is necessarily much scattered. The third annual report 

 of the American Breeders' Association^ contains a large number of papers cover- 

 ing a wide range of subjects relating to both plant and animal breeding. The 

 papers which are of most interest to scientific breeders and students of heredity are 



poultry 



the 



AVENPORT 



breeds," by W. E. Castle; "Some results in selecting red clover for disease resist- 

 ance," by S. M. Bain; "Heredity in carnation seedlings," by J. B. Norton; 

 "Report of the committee on theoretic research in heredity," by Charles W. 

 Ward; "The chromosome in the transmission of hereditary characters," by W. J. 



Spillman 



ports 



be of the greatest value to breeders of the economic crops. One of the best of these 



■ -- S 



* Sargent, C. S., Trees and shrubs. Illustrations of new or little known ligneous 

 plants, prepared chiefly from material at the Arnold Arboretum of Harvard University- 

 Vol. II. Part I. pp. 1-55. pis. 101-125. Boston and New York: Houghton, Mifflin 

 & Company. 1907. $5.00. 



' Bessey, Charles E., A synopsis of plant phyla. Univ. Nebraska Studies T.no. 

 4- pp. 100. 1907. Lincohi: University Publishing Company. 50 cents. 



8 Annual report of the American Breeders' Association, Vol. 3. 8vo. pp. 3°S- 

 \\ ashington, D. C. 1907. 



