386 ORDER LXVITI. COMPOSITE. 



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

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

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



Genus XLV.— IIA'LEA. T. <fc G. 

 (In honor of Dr. Joseph Ilale, 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. Ackenia 4- 

 sided, pubescent, with a short scaly pappus. 



1. H. Ludovicia'na, (T. & G.) Stem striate, quadrangular below. 

 Leaves opposite, sessile, sometimes verticillate by 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'eea, (Moench.) (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 Linnaeus.) 



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

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

 toothed margin. 



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

 ers* gments sometimes 'J parte I. Flowers large, showy ; involucre with 

 the Leaves oearlj equal; raj florets Long, reflexed, those of the disk 

 purple. — Yellow, if. July — Oct Upper districts of Car. and Geo. 

 4—5 feet. 



2. R. ful'gida, (L.) Stem hispid, with Long, virgate, 1 -flowered 

 branches. Leaves numerous, oblong Lanceolate, alternate, sessile, hispid, 

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



