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1904] BRIEFER ARTICLES 389 
The stalks of the cotyledon and leaf are quite different in anatomi- 
cal structure. In all cases the vascular tissue of the cotyledon stalk is 
placed in the center, and is for the most part organized as a single 
vascular bundle. In the leaf stalk the vascular tissue has the usual 
arrangement, the bundles being three or more in number and placed 
in the form of a circle or a partial circle or ellipse. 
In these families, as in the Papilionaceae, there seems to be no 
relation in external form between the cotyledon and leaf. Whether it 
will be considered best to continue the use of the name “seed leaf”’ 
for cotyledon must depend on other things than mere anatomy of the 
Structures considered, but the writer believes that further study will 
bring the problem of the cotyledon nearer solution.—FRANcIs 
Rama.ey, University of Colorado, Boulder, Colo. 
