( 2051 ) 



Helianthus angustifolius. Narrow- 

 leaved Sun-Flower. 



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Class and Order. 

 Syngenesia Polygamia Frustranea. 



Generic Character. 



Recept. paleaceum, planum. Pappus diphyllus. Cat 

 imbricatus, subsquarrosus. 



Specific Character and Synonyms. 



Helianthus angustifolius ; caulibus gracilibus paucifloris, 



foliis altemis linearibus margine revolutis. 

 Helianthus angustifolius. Willd. Sp. PI. 3. p. 2244. Hort. 



Keic. ed. alt. b.p. 129. Pursh fl. amer. sept. 2. p. 572. 



Michaux fl. amer. bor. 2. p. 141. Persoon Syn. 2. 



p. 476. Meerb. ic. 1. t. 49. 

 Rudbecria angustifolia ; foliis oppositis linearibus,, integer- 



rimis. Sp. PL 1281. Willd. 3. p. 2050. Persoon 



Syn. 2. p. 4770. 

 Coreopsis foliis linearibus integerrimis. Gron. Virg. ed 1 



p. 181. Millie, t. 224. f.2. 

 Flos Solis marianus, foliis alternis angustissimis scabris. 



Petw. Mus. 644. 



Descr. Stem two feet high, hispid. Leaves alternate, 

 linear, with the margins rolled back, rough. Peduncles long, 

 one-flowered, rough. Calyx squarrose; leaflets subequal, 

 lanceolate, acuminate, hairy. Receptacle conical, paleaceous : 

 palea; embracing the florets. Pappus of two bristle-like 

 paleas. Ray deep yellow, very long in proportion to the 

 brown-purple disk, 



Helianthus angustifolius and Rudbeckia angustifolia 

 appear to be the same species, one of them ought therefore 



to 



