312 SYNGENESIA ^QUALIS 



SPARGANOPHORUS. Goert. 



Inmluci-um subelo- 1 Imolucrum some 



bosum imbiicatum; what globose, imbri- 

 squamis apice recurva- cate; scales recurved 

 tis. Semina coronata at the summit. Seeds 

 cupula subcartilaginea crowned with a carli- 

 nitida. Receptaculum laginous shining cup. 

 nudum. I Receptacle naked. 



1. Vebticillatus. 



9- 



S- • foliis linearibus, I Leaves linear, verti 

 verticillatis; capitulis I cillate; heads few, ter 

 paucis, terminalibus; minal; cup campanu 

 cupula campanulata, 5- | late, 5-toothed. 

 dentata* 



Mich- % p. 95. Pursh, 2. p. 518. Nutt, 2. p. 139- 

 Ethulia Uniflora. Walt. p. 195. 



An aquatic plant, growing in shallow water. 



Roots fibrous, creeping. Stem scarcely exceeding a foot in height, pube- 

 scent towards the summit, simple. Leaves linear, about an inch long, gla- 

 brous, verticillatej generally six in each whorl. Heads terminal, sometimes 

 solitary, frequently accompanied with other heads near the summit, /nvo- 

 lucrum imbricate, containing many flowers, leaves lanceolate, acunimate, 

 pubescent, the summits recurved, coloured. Corolla tubular, not much lon- 

 ger than the involucrum, pale purple. Seed glabrous, five angled, crownea 

 with a membranaceous pappus, deeply five-cleft. , . 



The pappus in this species appears to me to be cpraposed of five distinct, 

 ovate, membranaceous, denticulate scales, forming a proper calyx. 



Grows in the flat pine barrens in the middle districts of Carolina. 



Flowers 



HYMENOPAPPUS. L'Heritier. 



Involucrum polyphyl- 1 Involucrum many 

 lum, foliolis obovatis leaved, leaves oboyate 



coloratis, patentibus, j coloured, expandin 



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