152 BOTANICAL GAZETTE [februaxy 



Matte 



which he examined. I am therefore in doubt whether it is an absolute 

 failure to function, or only a delay; in either case we have an indication 

 that the cortical vascular tissue is a disappearing character. 



Another feature to which attention should be called is the constant 



bases of the cotyledonary bundles. 



hyp 



fig 



piper already cited and also in Jig. 2 of the present one. It is often rela- 

 tively more abundant than in some stems of Lyginodendron. The stem 

 cylinder above the cotyledons is endarch, the leaf traces becoming mesarch 

 almost immediately after leaving the cylinder. 



J. G. Land 



John M 



>/ 



LITERATURE CITED 



Sci. Nat. Bot. I. 16:389. 1829. 



Ann 



2 . CONStantin and Morot, Sur l'origin des f aisceaux libero-ligneux super 

 numeraires dans la tige des Cycaddes. Bull. Soc. Bot. France 32:1 73 

 1885. Abstract in Bot. Centralbl. 24:101. 1885. 



3- Dorety, Helen A., The seedling of Ceratozamia. Bot. Gazette 46:505 

 1908. 



4- Lesti bondois, Memoire sur la structure des Cycade'es. Comptes Rend 

 Acad. Sci. Paris 51:651. i860. 



rW r vr * A a r^ps. Caen 



6. 



1904. 



■ligneux 



1907. 



, Note preliminaire sur des germinations des Cycadac&s. Rennes 



7- Solms-Laubach, H. Graf zu, Die Sprossfolge der Stangeria und der ubrigen 



Cycadeen. Bot. Zeit. 48:177. l89 o. 

 8. Von Mohl, H., Ueber den Bau der Cycadeen-Stammes und sein Verhaitni* 



Stammes 



Akad. 



Munch. 1832^ Vermischte Schriften 195. 1845. 



10. 



, - , « uu u, Macrozamia compared with 



at ° l the other g ene ra of Cycadeae. Annals of Botany 10:601. 1896. 

 , Comparative anatomy of the Cycadaceae. Jour. Linn. Soc. Lon- 



11. 



898 



1 The anatomical structure of Bowenia spectabilis Hook. 



Ann 



1900 



