AND GENERA OF PLANTS. 357 



Continuation of Mr. NuttalVs Paper. Read December 18, 1840. U^-*^*^ 



ikt^i 



ENCELIA. (Adanson.) 



Encelia * Californica; suffruticose, erect, and much branched; branches 

 elongated, one-flowered, puberulous; leaves ovate-lanceolate, acute, entire, or 

 coarsely toothed towards the base, nearly smooth, three-nerved, rather crowded, 

 scabrous on the margin; involucrum villous, triserial. 



Hab. On dry hills, near St. Barbara, Upper California. Flowering in April; common. A 

 rather showy, low, brittle shrub, with the flowers of an Helianthus ; the rays neuter, fifteen to 

 twenty, three-toothed, and somewhat plaited. Leaves alternate, attenuated into a marginated pe- 

 tiole ; young stems and shoots canescent with an almost pulverulent pubescence ; peduncle rather 

 long. Stigmas lanceolate-ovate; palea membranaceous, sheathing; the achenium, which is flat, 

 obconic, without pappus, slightly emarginate and sericeous on the summit and margin. Florets of 

 the disk dark brown, smooth. The whole plant possesses the odor of Gailardia bicolor. 



Division Coreopside^. [Less.) 



COREOPSIS. (Linn.) 



To Decandolle's description of the genus I may remark that the palese of 

 the receptacle are deciduous. 



EucoREOPSis. — Achenium flatly compressed, winged, apex hidentate. 



1. Coreopsis dephinifolia; Lamarck. 2. Coreopsis tenuifolia; Ehret, Willd. 

 Sp. pi. 1. c. 3. Coreopsis Wrayi; Nutt. in Journ. Acad. Nat. Sci. Philad., Vol. 

 VIL, p. 76. Nearly allied to C. dephinifolia. 



Chrysomelea. — Achenia suhorbicular, bidentate, rvinged, at length convex and 

 incurved. — Leaves entire or pinnately dissected. 



t Leaves entire or auriculate. 



3. Coreopsis lanceolata; Linn. 4. Coreopsis crassifolia; Aiton. 5. Core- 

 opsis integrifolia; FomET. (C. CEmleri ; IEjLLIott.) 

 VII. — 4 p 



