334 



BOTANICAL GAZETTE [apkil 



G. Land, of whose advice and encouragement I wish to express my 

 keen appreciation. 



Mount Holyoke College 



South Hadley, Mass. 



LITERATURE CITED 



i. Boodle, L. A., On some points in the anatomy of the Ophioglossaccae. 



Annals of Botany 13:379-394- pi- 20 - l8 99- 



2. Bower, F. O., The origin of a land flora. London. 1908. 



3. Bruchmann, H., Ueber Anlage und Wachstum der Wurzeln von Lycopodium 



und Isoetes. Jena. 1874. 



4. , Ueber die Prothallien und Keimflanzen mehrerer europaischer 



Lycopodfen. Gotha. 1898. . 



5. Campbell, D. H., Contributions to the life history of Isoetes. Annals 01 



Botany 5:231-256. pis. 15-17. 1891. 



6. , Mosses and ferns. New York. 1905. 



7. De Bary, A., The comparative anatomy of phanerogams and ferns. H* 



Trans. Oxford. 1884. 



8. Eaton, A. A, The genus Isoetes in New England. Fernwort papers. 19^ 

 o. Farmer. T. B., On Isoetes lacustris L. Annals of Botany 5:37" 62 - P* * ' 



B., and Freeman, W. G., On the structure and affinitiesot 



1890. 



j 



Helminthostachys zeylanica. Annals of Botany 13:421-445- f"- ** £ r^ 



11. Gwyxne-Vaughan, D. T., On the real nature of the tracheae 1 

 Annalsof Botany 22:517-521. pi. 28. 1908. gl) 



12. Hegelmaier, F., Zur Kenntniss einiger Lycopodinen. tfot. 1* ■ 



497,513- 1874. Annalsof 



13- Hill, T. G., On the presence of a parichnos in recent plants. 



Botany 20:267-273. pis. 19, 20. 1906. Annals of Botan 



14. , On secondary thickening in Angiopterts evecta. i*nn<u 



16:173,174. 1902. 8-214 I 9 00 - 



15- , Secondary thickening in pteridophytes. NewPh >' to1 ' 5 \ 2 ° don ' 1862. 



16. Hofmeister, W., The higher Cryptogamia. Ray Soc ^ ty ' ,. de Isoe te 

 7- Kruch, O., Istologia ed istogenia del fascio conduttore della tog 



Malpighia 4:56-82. 1800. vhiinHel-Kryptogamen- 



8. Russow, E., Vergleichende Untersuchungen der Leitbunaei ,v 



St. Petersburg. 1872. 



19. Scott, D. H., and 



Annals of 



Botany 14:413-454. ph. 23, 24. 1900. p rog ressus Rei 



20. Scott, D. H., The present position of paleozoic botany 



■ V * 



21. 



Botanicae. 1906. 



20 *&l-&9- I 9° 6 - 



Lepidodendron 



Annals of Botany 



rophyll 



22. Smith, R. W., The structure and development of the *P£ I °J , J 

 rangia of Isoetes. Bot. Gazette 20:225, 323- pis. 13 20 - 



s a 



nd spo 



-stem 



23. Tansley, A. G., and Lulham, Miss R. B. J., A stuoy 01 i i905 



of Matonia pectinata. Annals of Botany I9:475-5 IQ - r ■ J ' 



