136 Trans. Acad. Sci. of St. Louis. 



conduplicate, at first somewhat indexed. Stipules prominent, 

 outside of their leaf. May 2d. 



Gymnocladus Canadensis, Lam. Buds at first scarcely 

 raised above the bark; superposed, two or three, one or some- 

 times any two of the three developing. Scales three, enlarging 

 greatly. First leaves with narrow stipules, pinnate below, 

 twice pinnate above, the pinnae ending in a bristle. Leaflets 

 and pinnae conduplicate. May 6th. 



Gleditschia triacanthos, L. Buds superposed, usually two 

 (one to three) both developing. Scales several, brownish, 

 thin and soon deciduous. First leaf pinnate with several leaf- 

 lets, downy beneath, smooth above; later ones twice pinuate. 

 Stipules minute ; petiole jointed with stem. Leaflets condu- 

 plicate as is the whole leaf, thus briuging the edge against the 

 bud. May 5th. 



Prunus Americana , Marsh. Scales numerous, the inner grad- 

 ually increasing in length and showing a transition to the leaves. 

 The first leaf has a pair of slender elongated stipules. Young 

 leaves enclosing the flattened bud, the edges not overlapping, 

 under surface silky pubescent and reticulately veined. Mar- 

 gin of leaf ciliate, serrations sharp and not glandular. Apr. 

 21st. 



Prunus Chicasa, Mx. Scales as in P. Americana. 

 Leaves smooth and shining, the serrations with a conspicu- 

 ous gland. Young leaves enwrapping the terete bud, the 

 edges considerable overlapping. May 4th. 



Rubus occidentalis ,Jj. Scales about six, first two rounded, 

 with buds in their axils; next two, three pointed, the buds 

 in their axils having well formed leaves nearly as long as 

 scales; the inner scales are three-cleft, the lateral lobes appar- 

 ently corresponding to stipules. Vernation plicate. Apr. 20th. 



Rubus villosus, Ait. Scales about five, outer hard and red, 

 pointed; inner gradually longer, rounded, hairy; fourth, 

 3-cleft; fifth, more deeply cleft; sixth, a small leaf. Verna- 

 tion plicate. Apr. 29th. 



Rosa Arkansana, Porter. Scales about seven. Outer ovate 

 and pointed, inner becoming rounded and erose-dentate, while 

 the innermost form a transition to leaves. Leaflets condupli- 

 cate, side by side. Apr. 20th. 



