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430 SYNGENESIA FRUSTRANEA. 



t 



Sp. pi. 3. p. 1717- Mich. 2. p. 136, Pursh, 2. p. 566. Nutt. 2. ^ 



179- » 



Coreopsis Bidens, Walt. p. 2 1 5. 



I have transcribed the specific character with only a verbal alteration 

 from Pursh, because the plant I shall describe differs from it m several parti- 

 culars and leads to a suspicion I have long entertained, that several species 



are now covered under this name. 



Root annual? Stem erect and declining, about two feet high, smooth 

 below, a little hairy towards the summit, with opposite branches and pedun- 

 cles. Leaves opposite, sessile, somewhat connate, oblong lanceolate, ser- 

 rate, glabrous. Peduncles sometimes opposite, sometimes from the division 

 of the stem, three to six inches long, generally erect, one-flowered. Involu- 

 cram double, the exterior about eight-leaved, the leaves unequal, foliaceous, 

 lanceolate, the largest as long as the florets of the ray, the interior eight- 

 leaved, the leaves equal, lanceolate, membranaceous, about as long as the 

 florets of the disk. Florets of the ray eight, lanceolate, bright yellow, bear- 

 ing only the rudiments of a germ; of the disk numerous, small, tubular, yel- 

 lowish. Seeds compressed, oblong, the pappus composed of two awns 

 which together with the edges of the seed are retrorsely aculeate, and some- 



times 



florets of the disk. 



membranaceous 



pools, very abundant, enliven' 

 Ids at the close of autumn with 



Flowers October — ^November. 



2. CoiVNATA. 



B. floribus discoide- I Flowers discoid^ ex- 

 is; involucio exteriore terior involucrumthnce 

 flore tripio longiore; as long as the flower; 

 foliis caulinis ternatis, stem leaves ternate, 

 foliolis lateralibus con- lateral leaves connate, 

 natis, floralibus oblon- floral leaves oblong- 

 go-lanceolatis. I lanceolate. 



Sp. pL 3* p. 1718. Pursh, 2. p. 566. Nutt. 2. p- 179- 



Root perennial. Stem about two feet high, glabrous, branches opposite, 

 heaves opposite, lanceolate, dentate, glabrous, very much attenuated at 

 base, paler or slightly glaucous (I describe from specimens) underneath, the 

 lower ternate, the upper simple, all somewhat connate at base. Pedttncles 

 opposite,^ one-flowered. Involucrum double, the exterior foliaceous, much 

 longer than the disk, the interior membranaceous, resembling the chaff <» 

 Ae receptacle. Florets of the ray 0; of the disk numerous, yellowish. Seed 

 compressedj awns of the pappus subulate, retrorsoly aculeate. Chaff of the 

 receptacle nearly as long as the florets of the disk. 



