igoSj 



BRIEFER ARTICLES 



413 



ovules 



ih^ 



906, the embtyos bore only one cotyledon 



When 



Matte 



Chamberlain and had begun the study, not knowing that the work was 

 being carried on in this laboratory. Matte reports that the embryo 

 is monocotyledonous. Chamberlain (14) in his recent report on Cera- 

 tozamia, read before the Chicago meeting of the Botanical Society of 

 Anaerica, makes the same statement. 



Fig. I.— Seedling of Ceratozamia showing base of the cotyledonary petiole encir- 



cling the stem. Natural size. 



Fig. 2. 



middle 



X8. 



Fig. 3.— Longitudinal section of seedling in the emergent stage: c, cotyledon; 

 J, scale; a, growing point of stem. X8- 



In other cycad embry^os, the cotyledons are often reported as unequal 



m size. 



,UB (5) observed and figured 



nalis. WoRSDELL 



one cotyledon was considerably shorter than the other. :\L\tte (7) re- 

 ports a case in Dioon edule in which the vascular strands in the smaller 



occumn 



rudiments 

 He also mentions an inequality in 



