446 DESCRIPTIONS OF NEW SPECIES 



Enjthremia apliylla; radical leaves linear? stem dichotomous, striate, nearly 



leafless, with three to five capituli; stigmas clavate; anthers distinctly bisetose. 



Prenanthes apliylla^ Nutt. Gen. Am., Vol. II., p. 123. Lygodesmia? aphylla, 



Decand, Vol. VIL, p. 198. 



Hab. Discovered on the Island of St. Marys, in Georgia, by Dr. Baldwyn. Stem twelve to 

 eighteen inches high. Involucrum, caliculum, and florets, as well as their colour, exactly as in the 

 preceding; the pappus, however, is scarcely more than scabrous. Lower part of the stem with one 

 or two leaves. 



HIERACIUM. (Linn.) 



HiERACiuM marianum. Obs. This species is very nearly allied to H. sca- 

 brum, but is well distinguished by the achenium, which is attenuated above, 

 and so far rostrate as to be precisely that of Crepis ! 



Hieracium harbatum, (Nutt. in Journ. Acad. Nat. Sci. Philad., Vol. VII.) 

 This species also inhabits the western plains as far as the Rocky Mountains. 

 The achenium, as in the preceding, is attenuated above, but not so much as in 

 the preceding. 



Hieracium '^macranthum; nearly smooth and green; stem erect and simple, 

 corymbosely branched at the summit; leaves numerous, sessile, linear-lanceo- 

 late or lanceolate, incisely and irregularly serrate, acute, scabrous on the mar- 

 gin; peduncles pubescent; involucrum blackish, but nearly smooth; sepals 

 lanceolate, imbricate in about three series, appressed ; achenium nearly black 

 and truncated. H. umbellatum, Hooker, Flor. Bor. Am., Vol. I., p. 300. 



Hab. In the forests of Oregon, near the Wahlamet. Nearly allied to H. Canadense, and still 

 more nearly to H. umbellatum. Pubescence very sparing, stellate. The involucrum never squar- 

 rose. From two to three feet high, and sometimes robust, with the leaves narrower; when slender, 

 with the leaves broader. Perhaps not sufficiently distinct from H. umbellatum; the leaves, how- 

 ever, are more gen ally serrate, and never so narrow. 



Hieracium Scouleri. 



Hab. Common near the Wahlamet. Considerably allied to some varieties of ^. Gronovii. 

 Hieracium aTbiflorum. 



Hab. Common round Fort Vancouver, on the Oregon, in shady woods, where it attains the height 

 of two to three feet. The stem is rigidly erect, and smooth to a few inches from the root, where 

 it presents long hairs like H. Gronovii, to which it is undoubtedly allied, and yet as certainly 



