280 ^ CENTURY OF PROGRESS IN THE NATURAL SCIENCES 



of experimental methods to bryophytes began so late, relatively, that investi- 

 gations on the physiology, cytology, genetics, and experimental morphology of 

 these plants have been pioneer enterprises. A more general interest in bryo- 

 phytes and a realization of their many advantages as experimental material 

 will lead to a much greater utilization of them. In this connection, it should be 

 pointed out that there is a significant increase in the number of nontechnical 

 (but not unscientific) handbooks and publications of broad interest, designed 

 for the general botanist and for amateurs. Some of the most recent examples 

 are Woodland Mosses by Watson (1947), Moser fra Skog og Myr by St^rmer 

 (1946), A Book of Mosses by Richards (1950), How to Know the Mosses by 

 Conard (1944), Mosses With a Hand-Lens by Grout (1947), and two Swedish 

 publications lavishly and beautifully illustrated in color (Ursing, 1949; Nann- 

 feldt and Du Rietz, 1945). Although European botanists in general are very 

 well aware of the importance of bryophytes as a source of supplementary data 

 in phytogeographical and ecological studies and as providing excellent material 

 for experimental researches, American botanists still tend to underestimate their 

 value. Consequently, the trend toward the popularization of bryology through 

 nontechnical works is highly desirable, especially in this country. 



BIBLIOGRAPHY 



Allen, Charles E. 



1945. The genetics of bryophytes. II. Bot. Rev., 11:260-287. 



Allorge, Pierre 



1947. Essai de bryog^ographie de la Peninsule Iberique (doc. r^unis par Mine. Pierre 



Allorge). 114 pp., 8 pis., 2 maps. Paris: P. Lechevalier. 



Allorge, Valia, and Pierre Allorge 



1948. Vegetation bryologique de I'ile de Flores (Agores). Rev. Bryol. et Lichenol., 



n.s., 17:126-164. 



Amann, Jules 



1928. Bryogeographie de la Suisse, x + 453 pp. Zurich: Fretz Freres. 



Amann, Jules, and Charles Meylan 



1912. Flore des mousses de la Suisse. 215 + 414 pp. Lausanne: Imprimeries R^unies 



S.A. 



Ammons, Nelle 



1940. A manual of the liverworts of West Virginia. American Midi. Nat., 23:3-164. 



Andrews, A. LeRoy 



1913. Sphagnales — Sphagnaceae. N. Amer. Flora, 15(pt. 1) :1-31. 



1951. Studies in the Warnstorf Sphagnum herbarium. VI. The subgenus Inophloea 



in the eastern hemisphere. Bryologist, 54:83-91. 

 1951. Taxonomic Notes. X. The family Leptostomaceae. Bryologist, 54:217-223. 



Annales Bryologici 



1928-1939. A Yearbook Devoted to the Study of Mosses and Hepatics. Vols. 1-12 4- 

 suppl. vols. 1-4. Ed., Frans Verdoorn. Waltham, Mass.: Chronica Botanica Co. 



Apinis, a., and A. M. Diogucs 



1933. Data on the ecology of bryophytes. I. Acidity of the substrata of Hepaticae. 

 Acta Hort. Bot. Univ. Latvien., 8:1-19. 



