236 C0MP0SITJ5. (composite family.) 



§ 6. 0XYTEIP6LIUM, DC. Scales of the involucre imbricated, without herba- 

 ceous tips, usually veyy acute, the outer passing into scale-like bracts : pappus soft 

 and capillary : achenia striate, 



39. A. flexudsUB, Nutt. Stem zigzag, rigid, forked (6"- 20' high) ; the 

 branches bearing large solitary heads ; leaves linear, thick and fleshy, pointed, entire ; 

 scales of the bell-shaped involucre imh'icated in many rows, ovatc-lancuolate with 

 awl-shaped points ; rays numerou&, large, pale purple. — Salt marshes on the 

 coast, Maine to Virginia. Sept. 



40. A. linifdlius, L. Annual; stem much branched (6'-2't' high), the 

 branches bearing numerous racemose or panicled small heads ; leaves linear-lanceolate^ 

 pointed, entire, flat, on the branches awl-shaped; scales of the oblong involucre 

 linear-aivl-sliaped, in Jew rows ; i'ays somewhat in two rows, slwfrt, not projecting be- 

 yond the disk, more numerous than the disk-flowers, purplish. (A. subulatuSj 

 Michx.) Salt marshes, on the coast, Maine to Virginia. Aug. - Oct. 



41. A. angilStUS, Torr. &Gr. (Tripolium angustum, Zi'nriL T. frondo- 

 6um, Nutt. Also in Siberia, Conyza Altaica, DC, and Brachyactis ciliata, 

 Ledeb. ) An annual species related to the last, but with broader leaves, very 

 many minute rays, and more copious pappus : comes from the northwest to near 

 the borders of Wisconsin. 



14. ERIGERON, L. Fleabaxe. 



Heads many-flowered, radiate, mostly flat or hemispherical ; the narrow rays 

 very numerous, pistillate. Scales of the involucre narrow, nearly equal and 

 little imbrica.ted. Receptacle flat or convex, naked. Achenia flattened, usually 

 pubescent and 2-nerved. Pappus a single row of capillary bristles, with minuter 

 ones intermixed, or with a distinct short outer pappus of little bristles or chafly 

 scales. — Herbs, with entire or toothed and generally sessile leaves, and solitary 

 or corymbed heads. Disk yellow ; ray white or purple. (Name from ?p, spring, 

 and yepcuv, an old man, suggested by the hoary appearance of some of the ver- 

 nal species.) 



§ 1. C-^^NOTTIS, Nutt. Rays inconspicuous, in several rows, scarcely longer than 

 the pappus ; pappus simple : chiefly annuals and biennials. 



1. E. Canad6nse, L. (Hoese-weed. Butter-weed.) Bristly -hairy ; 

 stem erect, wand-like (3° ^ 5° high) ; leaves linear, mostly entire ; those from the 

 root cut-lobed ; heads very numerous and small, cylindrical, panicled. — Waste 

 places ; -1 common weed, now widely diffused over the world. July - Oct. — 

 Ligules much shorter than their tube, white. (Nat. in Eu. &c.) 



2. E. divaric&tum, Michx. Difl^u.se and decumbent {3' -&' high) ; leaves 

 linear or awl-shaped ; heads loosely corymbed ; rayspurple: otherwise like No. 1. — 

 Illinois, Kentucky, and southward. 



3. E. acre, L. Sparsely hairy or smoothish ; stem erect ( 10' -20' high) ; 

 leaves lanceolate or the lower spatulate-oblong, entire ; heads several or rather 

 numerous, racemose or at length corymbose, nearly hemispherical (4" - 5" 

 long) ; rays purplish or bluish, equalling or a little exceeding the copious pap- 

 pus. — Shores of Lake Superior (Dr. Bobbins, Prof. Porter, &c.), and northwest- 

 ward. (Eu.) 



