1917] BRIEFER ARTICLES 437 



developed, on which in turn occurred an apogamous embryo. In the 

 latter the root developed first. Only three cases of apogamy were 

 observed in Osmunda Claytoniana in Prantl's solution with K2SO4 omitted. 

 In two cases the sporophytes developed from a mass of cellular tissue, 

 while the third arose as an outgrowth in the notch of the prothallium. 

 A further study will be made of these apogamous forms. — Elizabeth 

 Dorothy Wuist, Osborn Botanical Laboratory, Yale University. 



