AcTiNOMERis. COMPOSITiE. 337 



branched at the summit ; the branches slender, naked above ; leaves oval or 

 lanceolate-oblong, sharply and unequally serrate, obtuse or rather acute, ses- 

 sile b}' a slightly cordate base ; the uppermost alternate or scattered ; heads 

 irregularly corymbose; rays linear, elongated; achenia obovate-oblong, oc- 

 casionally winged on one or both sides. — Natt. ! in trans. Ainer. phil. soc. 

 {n. ser.) 1. p. 3^04. Helianthus? aristatus, ELL! sk. 2. p. 428. 



Dry sterile soil, Georgia ! Alabauia ! and Middle Florida ! Aug.-Nov. — 

 Stem 2-3 feet high, often simple. Leaves 2-3 inches long, l-lj broad. 

 Heads small, 2-5 on each erect branch ; the central or primary on a short 

 peduncle; the lateral on slender spreading peduncles. Chaff ovate-lanceo- 

 late, acute, longer than the achenia. Awns erect, variable and somewhat 

 unequal, but usually much shorter than the achenia. — Elliott suspected this 

 plant to belong to Actinomeris, of which there is no doubt: although the 

 achenia are generally wingless, or obscurely margined near the summit, a 

 few of them are sometimes furnished with a conspicuous wing on one or both 

 sides : the heads resemble the preceding section. 



§ 5.^ Aivns of the winged achenia obsolete : leaves opposite, decurrent on the 

 stem: peduncles naked, elongated: rays 3-4. — Ach^ta, Nutt. 



5. A.? pauciflora (Nutt.): hirsute; leaves elliptical, obtuse, serrulate; 

 peduncles very long, bearing 2 heads ; achenia with a shallow cup at the 

 summit. — Natt. ! in Sill. jour. 5. p. 301, c^' trans. Amer. phil. soc. I. c. 



East Florida, Mr. Ware. — Achenia obovate-oblong, with a conspicuous 

 wing, which extends across the summit, and forms a slight cup. 



Div. 3. CoREOPSiDETE, DC. (excl. gen.) — Rays neutral, ligulate, or 

 very rarely wanting. Achenia obcompressed (that is, flattened parallel with 

 the scales of the involucre), not rostrate. Pappus 2- (rarely 4-) toothed or 

 awned (sometimes obscurely coroniform), or none; the awns or teeth often 

 upwardly, but never retrorsely hispid. 



100. AGARISTA. DC. prodr. 5. jJ- 569 ; not of Doji. 



Heads many-flowered; the ray-flowers (8-10) neutral; those of the disk 

 tubular, perfect. Involucre broadly campanulate, double ; the exterior of (4, 

 DC.) usually'5 broadly ovate somewhat foliaceous scales, united at the base; 

 the interior of 8 oblong-ovate acute somewhat membranaceous scales, longer 

 than the exterior series. Receptacle flat ; the chaff membranaceous or 

 somewhat hyaline, linear-lanceolate, deciduous with the fruit. Rays obo- 

 vate-cuneiform, truncate at the summit, many-nerved. Corolla of the disk 

 with a long and slender tube, and an infundibuliform-campanulate deeply 

 6-toothed limb. Branches of the style tipped with a short mucronulate cone. 

 Achenia obcompressed ; those of the ray sterile, (but often containing an 

 abortive ovule) oval, glabrous, margined, desthute of pappus ; of the disk 

 oblong or elliptical, with a large basilar callus, densely villous with very 

 long hairs, except the exterior surface in contact with the chaff. Pappus of 

 2 lanceolate 1-ribbed chaffy scales, arising from the angles of the achenia, 

 about as long as the corolla, deciduous. — An annual very glabrous herb, with 

 VOL. II. — 43 



