138 Trans. Acad. Sci. of St. Louis. 



Morus rubra, L. Scales two-ranked, six or seven. First 

 leaf usually ovate, sometimes slightly lobed; inner ones lobed 

 or entire. Vernation and arrangement of narrow stipules as 

 in Celtis occidentalis. May 2d. 



Platanus occidentalism L. Bud conical; scales two, each 

 covering the bud, the outer smooth, the inner covered by a 

 gummy secretion, and usually having a bud in its axil. First 

 leaf well formed, its stipule covering the remainder of the 

 bud. Vernation revolute. May 2d. 



Juglans nigra, L. Scales two to four, the outer oblong and 

 obtuse, the inner increasing in length and passing by a series 

 of clefts and lobes into a few-divided leaf. Flower buds 

 from the lower part of the previous year's growth, usually 

 two catkins superposed, each bearing two or three small scales 

 at base. Leaflets conduplicate, the edges toward the rhachis 

 and the sides pressed against the bud. May 4th. 



Gary a amara, Nutt. Scales two, valvate, covered with yel- 

 lowish resinous dots, usually elongating and developing a few 

 lobes at the apex. The first leaf, and sometimes the second 

 also, is imperfectly developed. Leaflets conduplicate, side 

 by side as shown in the drawing. May 3d. 



Ostrya Virginica, Willd. Scales several, the first two are 

 empty, the next pair are stipular wilh its leaf reduced to a 

 mere appendage. The third pair is attached to a normal leaf. 

 Vernation straight but the leaf clasping the bud. Apr. 22d. 



Quercus macrocarpa, Mx. Scales stipular as in Q. tinc- 

 toria. The gradation is rather gradual from large stipules 

 to narrow and from small leaves to large. Vernation condu- 

 plicate but the bend to one side of the midrib (Fig. 107). 

 May 3d. 



Quercus Muhlenbergii, Engelm. Scales numerous, five- 

 ranked, much as in Q. tinctoria, but the change from broad 

 scales to narrow ones at the base of the perfect leaves is 

 more abrupt ; thus the leaves appear to come from the top 

 of the bud. Vernation conduplicate. May 3d. 



Quercus tinctoria, Bartram. Scales very numerous, five- 

 ranked, lower short, upper increasing in length. Several at 

 the base are empty, above these each pair has a minute leaf in 

 the angle between and inside, thus being stipular. The inner 



