1902] 



BRIEFER ARTICLES 



141 



form, but some are likey?^^^. // and 12. They are placed chiefly on 

 the margin of the leaf blade and along the course of the vascular 

 bundles. With them are many short, glandular hairs like those of the 

 petiole (^fig. id). 



It may be noted that Solereder^ notes the presence of the glandular 



hairs which are here described and figured. 



lie states that in Ero- 



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Trichomes of Erodium ciciita 



ri 21 m 



: /, 2, J, from the hypocotyl ; 4, 5, 6, 7, from 



the stalk of the cotyledon; 5*, g, from the blade of the coty]edon ; /£?,//, from the 

 leaf petiole; is, from the rachis; 13, from the leaf petiole; 14, from the leaf blade; 

 all X 170, 



dium, Geranium, and Pelargonium the cells of the stalk may be all 

 alike or the basal one may be swollen to form a pedestal-like structure 

 i^f-figs- 9 and 10 with 8 and /j). 



Careful search was made both on the early and later leaves for tri- 

 chomes with the form of figs. 4, 8, and 13, but with the basal cell 

 thick-walled tuberculate. None were found on the material studied, 

 although reported in the paper previously cited. Beside this difference 

 in my own and Mr. Preston's results there are many others. He states 



^SoLEREDER, Syst. Anat. d. Dicotvledonen. p. IQ3. 1899. 



