FUNARIA HYGROMETRICA (l.) SCHREB. 
399 
axis of a branched gametophore, a lateral innovation bearing archegonia in 
the greater number of instances or in some cases antheridia. Antheridia 
may be borne on unbranched axes. 
4. The archegonia are usually found at the apex of an innovation of 
the male axis; but they may occur at the apex of the principal axis, the inno- 
vation bearing either archegonia or antheridia. Unbranched gametophores 
frequently bear female inflorescences, but they are less common than male 
inflorescences in this position. 
5. Synoicous inflorescences occur in Funaria hygrometrica. 
6. There is no regularity as to the sex of the organs borne on branches 
of the archegonial and antheridial axes after the first year of growth. 
I wish to express my sincere thanks to Professor C. E. Allen who sug- 
gested this work and under whose supervision it was done. 
Department of Botany, 
University of Wisconsin 
BIBLIOGRAPHY 
de Bergevin, E. 1902. Interversion dans la croissance des organs sexuels du Plagiothe- 
cium sylvaticum. Rev. Bryol. 29: 115-119. 
Blakeslee, A. F. 1906. Differentiation of sex in thallus gametophyte and sporophyte. 
Bot. Gaz. 42: 161-178. 
Boodle, L. A. 1906. Monoecism in Funaria hygrometrica Sibth. Ann. Bot. 20: 293-299. 
Bower, F. O., and Gwynne-Vaughan, D. F. 1905. Practical botany for beginners 
London. 
Braithwaite, R. 1 888-1 895. The British moss flora. Vol. 2. London. 
Brotherus, V. F. 1909. Bryales. Engler und Prantl. Die natiirlichen Pflanzenfamilien. 
i^: 283-530. 
Bruch, P., Schimper, W. P., and Giimbel, T. 1836-1851, Bryologia europaea. Bd. 3. 
Stuttgart. 
Campbell, D. H. 1895. The structure and development of mosses and ferns. New York. 
. 1905. The structure and development of mosses and ferns. 2d ed. New York. 
. 1918. The structure and development of mosses and ferns. 3rd ed. New York. 
Collins, E. J. 1919. Sex segregation in the Bryophyta. Journ. Gen. 8: 139-146. 
Coulter, J. M., and Coulter, M. C. 1918. Plant genetics. Chicago. 
Dixon, H. N., and Jameson, H. G. 1896. The student's handbook of British mosses. 
London. 
— : . 1904. The student's handbook of British mosses. 2d ed. London. 
Goebel, K. 1882. Die Muscineen. Schenck's Handbuch der Botanik 2 : 315-401. 
, 1887. Outlines of classification and special morphology of plants. Engl, transl. 
Oxford. 
Hedwig, J. 1782. Fundamentum historiae naturalis muscorum frondosorum. Lipsiae. 
Holferty, G. M. 1904. The archegonium of Mnium cuspidatum. Bot. Gaz. 37: 106-126. 
Hy, F. 1884. Recherches sur I'archegone et le developpement du fruit des Muscinees. 
Ann. Sci. Nat. VI. Bot. 18: 105-128. 
Jones, W. N. 1918. On the nature of fertilization and sex. New Phytol. 17: 167-188. 
Lesage, P. 1918. Contributions a I'etude de la germination des spores des Mousses. 
Compt. Rend, de I'Acad. Sci. 166: 744-747. 
Lesquereux, L., and James, T. P. 1884. Manual of the North American mosses. Boston. 
Limpricht, K. G. 1890. Die Laubmoose Deutschlands, Oesterreichs und der Schweiz. 
4^: 1-65. 
Lindberg, S. O. 1879. Of verging af honorgan till honorgan hos en bladmossa. Ofv. 
Svensk. Vet. Akad. Forh. 5: 73-78. (Ref. Just, L., Bot. Jahresb. 8^: 503-504.) 
