394
AFPENDIX.
This appears to coincide with Mr. Nuttall's plant if I am not mistaken in the; colour of the flower. The leaves are however more lanceolate and acuminate than he describes them.
80.  Hieracium cahadense, Michaux, II. p. 86. 0. var. scabrum.
Differing from the plant I have been wont to consider as the H. canadense of Mx. by smaller, more rigid, and scabrous leaves.
81.  Hieracium *scabriusculum, L. v. Schw.
The collection affords but a single specimen, which, however, is so different from the rest of the American species, (not agreeing with any European, as far as I have been able to ascertain,) that I have thought it well to point it out by the following description.
Stem glabrous, firm, erect, terete, much grooved and foliose. Leaves alternately sessile, clasping the stem, closely set below, decreasing in size, and becoming more distant upwards; ovate-lanceolate, not exceeding an inch in length below, one-fourth in breadth; distantly and elongately toothed in the margin, which appears somewhat involute. Lower surface glaucous, and distantly beset by short, rigid hair. Upper surface rugose and the margin rendered scabrous by short, thick, close set setae or teeth, very conspicuous under the lens. Stem divided in summit into several few-flowered branches, the peduncles tomentose, and incrapate above, with a few lanceolate bracteas or floral leaves. Calyx nearly smooth. Flower large, yellow.
Apparently about one foot and a half in height.
82.  Cakduus muticus, Pursh, p. 506.
A very imperfect specimen, which, however, decidedly belongs to this species.
83.  Vernonia *coryrnbosa,~L. v. Schw.