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ECHINACEA DUBIA. 



(Doubtful Echinacea.) 

 LINNEAN SYSTEM. ' „ NATURAL ORDER. 



SYNGENESIA POLYGAMIA. °' ' COMPOSITE § SENECIONIDE^. 



GENERIC CHARACTER. 



Echinacea (Mcbnch.) Capitulum multiflorum heterogamum, flosculis radii neutris longe 

 ligulatis 1-serialibus, disci hermaphroditis regulariter 5-fidis, tubo subnullo, fauce nuda, limbi 

 dentibus erectis. Involucrum 3-seriale, squamis lanceolatis ciliatis. Receptaculum ovatum, 

 paleis rigidis superne cartilagineis flores disci superantibus onustum. Staminum filamenta ex ima. 

 corolla orta. Styli rami appendiculis semilanceolatis superati. Achania tetragona obpyramidata 

 crassa pappo irregulariter lacero subcoroniformi deciduo coronata. Herbce Boreali-Americanas 

 perennes. Folia radicalia petiolata, caulina alterna sessilia serrata aut integerrima. Rami supeme 

 nudi 1-cephali. Capitula ampla, ligulis purpureis 2-3-dentatis 1-2 pollices longis, flosculis disci 

 obscure virescentibus. — (Be Cand. Prod. vol. 5, 554.) 



Head many-flowered, heterogamous ; florets of the ray neuter, longly strap-shaped, in a 

 single series ; florets of the disc hermaphrodite, regularly 5-cleft, tube scarcely any, throat naked, 

 teeth of the limb erect. Involucre in a triple series, with lanceolate, ciliated scales. Receptacle 

 ovate, beset with rigid palece cartilaginous in their upper part, and exceeding in length the 

 flowers of the disc. Filaments of the stamens arising from the bottom of the corolla. Branches 

 of the style crowned with little semilanceolate appendages. Achcenia 4 -sided, obpyramidal, 

 thick, crowned with deciduous irregularly divided pappus. — Perennial plants, natives of North 

 America. Radical leaves petiolate, those of the stem alternate, sessile, serrated, or very entire. 

 Branches naked above, 1-headed. Heads large, rays purple 2 or 3 toothed, 1 or 2 inches long ; 

 florets of the disc obscurely greenish. 



SPECIFIC CHARACTER. 



E. dubia ; scabra, foliis radicalibus longe petiolatis, pandurato-trilobatis, lobis distantibus, 

 caulinis conformibus sessilibus ; paleis flosculis brevioribus. 



Scabrous, radical leaves longly petiolate, pandurately three-lobed, lobes distant, those of the 

 stem similar in form, sessile ; palese shorter than the florets. 



Descr. — Whole plant rough with short coarse hairs ; radical leaves numerous, crowded, 

 from 10 to 12 inches long, coarsely and irregularly toothed, ciliated, more or less panduriform, 

 3-lobed, with a lengthened space between the terminal lobe and the posterior lobes, which are 

 extended backwards into a leafy border on each side of the lengthened petiole ; cauline leaves 

 small, sessile, minutely toothed, similar in shape to the radical leaves, and, like them, edged with 

 coarse incurved cilia}. Flower-stalk strong, furrowed, 1 -flowered, with occasionally one or two 

 lanceolate bractes on the upper part. Scales of the involucre coarse, rigid, arranged in three 

 series, of which the outer are acuminate, and exceed in length the florets of the ray. Flowers 



y2 



