Bibliography. 
. Bary, À. de. Comparative Anatomy of the Phanerogams 
and Ferns. Oxford, 1884. 
‘ Bertrand, I Prog. Re1. Bot., IV, 182, 1913. 
. Bower, F.O. The Origin of a Land Flora. London, 1908. 
. — Ann. Bot. XXV, 537, 1911. 
1Prebuer, G. Ann. Bot.-XVI, 517, 1902 
. Britton, N. L. and Brown, A. Illustrated Flora of the 
Northern United States. New York, 1806. 
. Bruchmann, H. Flora, XCVI, 203, 1906. 
. Campbell, D. H. Ann. Jard. Buitenzorg. VI, 138, 1907. 
. — The Eusporangiatae. Carn. Inst. Publ. 141, 1911. 
. — Ann. Bot. XXVIII, 652, 1914. 
. — Ann. Bot. XXXV. 1921 (in press). 
TCvmbbs. JE. Bot. Gaz. LXX, 279, 1920: 
. Delpino,F. Teoria generale della Fillotassi. Genova, 1883. 
. Duval-Jouve. Bull. Soc. B. France. XV, 140, 1882. 
. Farmer, J. B. and Hill, A. G. Ann. Bot. XVI, 871, 1902. 
. Faull, J. H: Bot. Gaz. XXXII, 381, 1901. 
. Gwynne-Vaughan, D. T. Ann. Bot. XV, 1901. 
. Holle, H. G. Bot. Zte. XXXIII, 241, 1875. 
. Jeffrey, E. C. Proc. Canad. Inst. 5, 1898. 
. — The Anatomy of Woody Plants. 
. Lang, W. A. Mem. Proc. Manchester. Soc. LVI, 2, 1912. 
. — Ann. Bot. XXVII, 203, 1913. 
. Leclerc du Sablon, M. Ann. Sc. Nat. II, 1, 1890. 
“Lyon, H. L. Bot. Gaz. XL, 455, 1905. 
. Poirault, G. Ann. Sc. Nat. XVIII, 113, 1893. 
. Potonié, H. Grundlinien der Pflanzenmorphologie im 
Lichte der Palaeontologie. Berlin, 1912. 
