138 BOTANICAL GAZETTE [august 



7. The female gametophyte is often prominently lobed, and 

 develops a large number of archegonia (sometimes exceeding 200), 

 which are produced on any part of the surface or even within the 



Tm 



8. Many embryos are produced, the suspensor being very long 

 and spirally coiled and pressing the embryo tip against the endo- 

 sperm; the cotyledons are three to six in number. 



g. Microcycas may be regarded as the most primitive cycad yet 

 described. 



I wish to acknowledge the kindly assistance in the field and in 

 camp from Senor don Felice Hernandez y Cruz of Santa Catalina, 



i 



Cuba; assistance in the field and courtesies in the laboratories of the 

 Cuban Agricultural Experiment Station from Professor C. F. Baker, 

 Director J. T. Crawley, Mr. H. A. van Hermann, and Mr. E. W* 

 Halsted; and courtesies of the laboratories, constant suggestions, 

 and helpful criticism from Professor John INI. Coulter and the 

 members of the botanical staff of The University of Chicago. 



The University of Chicago 



LITERATURE CITED 



I* Caldwell, O.W., and Baker, C.T,,T\it idtniiiy oi Microcycas calocoma. 



BoT. Gaz. 43'33o-335- fe^- J- iQo?- 



2. MiQUEL, A. F. W., Sur une espfece nouvelle de Zamia des Indes occiden- 



tales, introduite dans retablissement Van Houtte, a Gand. VanHoutte's 

 Fl. Serres et Jard. 7:141. 1851. 



3. DeCandolle, a., Microcycas calocoma. DC. Prodr. 16^:538. 1868. 



4. Chaiiberlain, C. J., The ovule and female gametophyte of Dioon. Box. 



Gaz. 42:321-358. ph. 13-15. jigs. i-p. 1906. 



5. Stopes, M. C, On the double nature of the cycadean integument. Annals 



of Botany 19:561-566. 1905. 



6. Webber, H. J., Spermatogenesis and fecundation of Zamia. BuIL 2, U. S. 



Bureau of Plant Industry, pp. 100. pis. 6, 1901. 



7. Ikeno, S., Untersuchungen uber die Entwickelunc^ der Geschlechtsorgane 



und der Vorgang der Befruchtung bei Cycas revoluta, Jahrb. Wiss. Bot. 

 32:557-602. pis. 8-10, 1898. 



8, HiR.\sf , S., Etudes sur la fecondation et rembr}'ogenie du Ginkgo hiloba. 



Jour. Imp. Coll. Sci. Tokyo 8:307-322. pis. 31-32. 1895. 



9. Lang, W. H., Studies in the development and morpholog}' of cycadean 



