HELIANTHUS ANGUSTIFOLIUS. 



NARROW-LEAVED SUN-FLOWER. 



Polygamm Frustanea, Linn. Corymbifcrx, Juss. 



GENERIC CHARACTER. 



Cal'ix imbricated, subsquarrose, foliaceous. Receptacle paleaceous, flat. Pappus pa- 

 leaceous, 2-leaved, caducous. 



SPECIFIC CHARACTER. 



Stems weak, slender, sub-one-flowered ; leaves linear, margin revolute, rough. 

 Willd. Sp. pi. p. 2244. 



Root perennial. Stem from two to three feet high, irregular and 

 undulating, cylindrical and very smooth and shining. Leaves by pairs, 

 opposite below, alternate above, very scabrous on the upper disk and 

 margins, each pair very remote from the next, often on the lower part 

 of the stem, six or seven inches asunder. They are linear and very 



