394 APPENDIX. 



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 des- 

 cribes them. 



80. HiERAciUM canadense, Michaux, II. p. 86. 



/3. var. scahrum. 



Differing from the plant I have been wont to consider 

 as the H. canadense of Mx. by smaller, more rigid, and sca- 

 brous leaves. 



SI. HiERAciTiM *scabriusculum, L. v. Schw, 



The collection affords but a single specimen, which, how- 

 ever, 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 sca- 

 brous by short, thick, close set setae or teeth, very conspi- 

 cuous under the lens. Stem divided in summit into seve- 

 ral 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. Carduus 7nuticus, Pursh, p. 506. 



A very imperfect specimen, which, however, decidedly 

 belongs to this species. 



83. Verxoxia "^corymhosa, L. v. Schw. 



