134 Trans. Acad. Sci. of St. Louis. 
(Bot. Zeit. 1874, p. 47; Just, ii, p. 548). There is considerable 
literature relating to twigs but this is outside the subject 
treated in this paper. 
Asimina triloba, Dunal. Buds naked, protected by the two 
outer, boat-shaped, dark ferruginous, silky leaves which in- 
crease but slightly in size as the bud opens, and never assume 
the typical shape. Inner leaves conspicuously 2-ranked, each 
successively inclosing the remainder of the bud. The flower 
buds are lateral, globose. May 3d. 
Menispermum Canadense, L. Scales about 5, rounded to 
elliptical, smooth. Internodes above these elongating; young 
stem and leaves gray-villous. First leaf undeveloped, several 
cleft at apex, others normal. Vernation straight. Leaf-scars 
circular, concave. Buds 2 or 3 superposed, the upper just 
above the scar, the others bursting through a V-shaped erack 
in the leaf scar. May 6th. 
Tilia Americana, L. Bud scales 2, the inner larger. 
Leaves well developed, each covered by its two large stipular 
scales. Vernation conduplicate. Apr. 30th. 
Xanthozylum Americanum, Mill. Buds low; scales two 
pairs, the outer pair short and dark brown, the bases of the 
scales joined by a circle of reddish brown fuzz; inner pair 
longer and their tips reddish brown with a similar pubescence. 
First leaf usually abnormal or abortive with two or three 
leaflets of unequal development, the later leaves successively 
better developed. Vernation of leaflets revolute, the leaf 
wrapping around the central cone. Apr. 29th. 
Celastrus scandens, L. Buds perpendicular to axis of plant. 
Scales numerous, the two outer gray, like the bark, with a 
ridge on the back at the apex; the inner with brown tips and 
green bases gradually passing into leaves. Vernation involute. 
Apr. 29th. 
J tropurpureus, Jacq Scales opposite, two pairs. 
First pair of leaves small and deciduous. Vernation involute. 
Apr. 20th. 
Ceanothus Americanus, L. Scales two to four, being rudi- 
mentary leaves with the stipules broadened and adnate to the 
much reduced blade. First leaf typical in form with two 
narrow hairy stipules. Vernation involute. Apr. 23d. 
