3$6 ORDER LXVIII. — COMPOSITE, 



late, with reflexed margins ; ray florets 6 — 8, large, of the disk numer 

 ous. Seeds slightly angled ; scales of the receptacle covered with glan- 

 dular dots. — Yellow. IT.. May — June. Sandy soils. 1 — 2 feet. 



Genus XLV.— HA'LEA. T. & G. 



(In honor of Dr. Joseph Hale, of Louisiana.) 



Heads many-flowered ; the ray florets pistillate, those of the 

 disk perfect. Involucre double, the outer of 4 — 5 ovate folia- 

 ceous scales, the inner of numerous chaffy scales. Achenia 4- 

 sided, pubescent, with a short scaly pappus. 



1. 1 1. Ludovicia'na, (T. <fc G.) Stem striate, quadrangular below. 

 Leavij opposite, sessile, sometimes verticillate hy threes, toothed, the 

 leaves oval-oblong, the upper ovate, or ovate-oblong, connate, perfoli- 

 ate. — Louisiana. 2 — 4 feet. 



Genus XLVI.— ECHINACEA. 



Heads many-flowered ; ray florets in a single series, much 

 elongated, sterile, those of the disk perfect and tubular. Scales 

 of the involucre ciliate, imbricate. Receptacle conic. Achenia 

 4-sided, ob-pyramidal. Pappus coroniform, unequally toothed. 

 Rays 2 — 3-toothed at the apex. 



E. purpu'rea, (Mcench.) (Rudbeckia purpurea, L.) Stem somewhat 

 branched, smooth, or a little roughened. Leaves ovate-lanceolate, sca- 

 brous, tapering toward the base ; those toward the upper part of the 

 stem narrower, all coarsely serrate. Flowers terminal ; involucre many- 

 leaved, imbricate, ciliate, in several series, squarrose ; ray florets long, 

 narrow, 2-cleft, reflexed. Seed angled, enlarged at the summit. Chaff 

 of the receptacle with rigid points, longer than the florets. — Purple. 

 U- Aug. — Oct. Upper Car. and Geo. 4 — 5 feet. 



2. E. angustifo'lia, (D. C.) Stem hispid, naked above. Leaves lance- 

 olate, hairy, hispid, entire, 3-nerved. — Alabama. 1 — 3 feet. 



3. E. atroru'bens, (Nutt.) Stem slender, glabrous, terete. Leaves 

 linear-lanceolate, entire, tapering into long petioles ; rays dark-red.— 

 Georgia and Florida. 



Genus XLVIL— RUDBECK'IA. L. 



(In honor of Prof. Rudbeck, of Sweden, predecessor of Lionseus.) 



Involucre in a double series, nearly equal. Ray florets neu- 

 tral, the disk perfect. Receptacle conic, chafty. Pappus a 4- 

 toothed margin. 



1. R. pinna'ta, (Mich.) Stem hispid, furrowed. Leaves pinnate, low- 

 er segments sometimes 2-parted. Flowers large, showy; involucre with 

 the leaves nearly equal; ray florets long, reflexed, those of the disk 

 purple. — Yellow. 2f . July— Oct. Upper districts of Car. and Geo. 

 4—5 feet. 



2. R. fui/gida, (L.) Stem hispid, with long, virgate, 1-floweied 

 branches. Leaves numerous, oblong-lanceolate, alternate, sessile, hispid, 

 tapering at the base ; involucre hispid, exterior leaves largest, some- 



