364 DESCRIPTIONS OF NEW SPECIES 



in a dormant state, shedding its leaves, and appearing like a tuberous or bulbous plant, inert. 

 Cultivated in Philadelphia, it flowered both in the spring and autumn. Leaves nearly all towards 

 the root, lucid and thick; the scape, or peduncle, a foot or more in length, with (generally in a 

 wild state) but a single flower, three or four inches in diameter. Rays about fifteen to twenty, or 

 more, with filiform, smooth stigmas, three-toothed at the apex; chaff of the receptacle composed 

 of oblong, membranaceous, flat and pointed scales. Rays, and several rows of the discal florets, 

 fertile. Discal florets smooth, cylindric, and, as it were, articulated at the commencement of the 

 tube ; the teeth acute and flaccid. Stigmas exserted. Achenium dark brown, with the empty or 

 winged margin of the same colour. — Remotely allied to Coreopsis, particularly the section Calli- 

 apsis, but with numerous fertile rays, minutely three-toothed, and a conspicuous, receptacular 

 chafF, &c.; also to Leptosyne, but with perfect fruit in the ray, a flat receptacle, and a very differ- 

 ent achenium, &c. 



ACTINOMERIS. (Nutt.) 



AcTiNOMERis nudicaulis. Helianthus aristatus; Elliott, Vol. II., p. 428. 

 Decand., Vol. v., p. 591. Leaves opposite, sessile, oblong or oval-lanceolate, 

 scabrous, subserrulate, obtuse; flowers in a trichotomous panicle; calyx 

 short, biserial; rays ten to twelve, lanceolate, entire; awns of the achenium 

 rather short, the winged margin narrow. 



Hab. In Georgia. 



§ *AcH^TA. — Awns of the achenium none; pappus a shallow, elliptic cup. — 

 Leaves opposite, decurrent, corymb few-flowered; rays three orf&itr, with rudi- 

 mental achenia. 



Actinomeris pauciflora; CNvTT.) hirsute, leaves elliptic, obtuse, decurrent; 

 peduncle two-flowered, very long. 



Hab. East Florida. (Mr. Ware.) 



LEIGHIA. (Cassini.) 



Leighia uniflora; shortly pubescent, herbaceous; stem mostly one-flowered, 

 terete; leaves below opposite, oblong-lanceolate, acute, sessile and narrowed 

 below, entire, three-nerved, above alternate; flower large, long pedunculate; 

 involucrum hirsute, squarrose, foliaceous at base; palese obtuse. — Helianthus 

 unifiorus; Nutt. in Journ. Acad. Nat. Sci. Philad., Vol. VII., p. 37. 



Hab. Rocky Mountains, towards the sources of the Missouri. Flowering early in June, (9th.) 

 Perennial, stem simple, generally one-flowered. Leaves three to four inches long, and, as well 

 as the stem, hirsute with short, appressed, soft hairs, scabrous on the margin, one or two pairs 



