108 COMPOSITE. (COMPOSITE FAMILY.) 



spring, and ) /paw, an old man, suggested by the hoary appeaitJice of some of 

 the venial species.) 



1. C^ENOTUS, Nutt. Rays inconspicuous, in several rows, sccrcely longer than 

 the pappus: disk-corollas 4-toothed : pappus simple : annuals and biennials: head* 

 very small, cylindrical. 



1. E. Canatlense, L. (HORSE-WEED. BUTTER-WEED.) Bristly- 

 hairy; stem erect, wand-like (5' -5 high); leaves linear, mostly entire; those 

 from the root cut-lobed ; heads very numerous, panicled. Waste places ; a com- 

 mon weed, now widely diffused over the world. July -Oct. Lieules much 

 shorter than their tube, white. 



2. E. divaricatum, Michx. Diffuse and decumbent (3' -6' high) ; leaves 

 linear or awl-shaped; heads loosely corymbed; rays purple: otherwise like No. I. 

 Illinois, Kentucky, and southward. 



$ 2. EUERfGEHON, Torr. & Gr. Rays elongated, crowded in one or more 

 rows : pappus simple. {Erect perennials : heads somewhat corymbed. ) 



3. E. bcllidifoliillll, Muhl. (ROBIN'S PLANTAIN.) Hairy, producing 

 offsets from the Itase ; stem simple, rather naked above, bearing few (1-9) large 

 heads on slender peduncles, root-leaves obovate and spatulate, sparingly 

 toothed ; those of the stem distant, lanceolate-oblong, partly clasping, entire ; 

 rays (about 50) rather broadly linear, liyht bluish-purple. Copses and moist 

 banks ; common. May. 



4. E. PlliladclpIliClim, L. (FLEABANE.) Hairy ; stem leafy, cor 

 ymbcd, bearing several small heads ; leaves thin, with a broad midrib, oblong ; 

 the upper smoothish, clasping by a heart-shaped base, mostly entire ; the lowest 

 spatulate, toothed; rays innumerable and very narrow, rose-purple or flesh-color. 

 (E. purpureum, Ait.) Moist ground; common. June -Aug. 



$ 3. STENACTIS, Cass. Some of the outer bristles of the pappus short and 

 minute, or rather chaffy: otherwise as 2. 



5. E. glabclllllll, Nutt. Stem (6'- 15' high) stout, hairy above, the 

 leafless summit bearing 1-7 large heads ; leaves nearly glabrous, except the 

 margins, entire, the upper oblong-lanceolate and pointed, closely .sessile or 

 partly clasping, the lower sp.ttulatc and pctioled ; rays (more than 100, purple) 

 more than twice the length of the hoary-hispid involucre. Plains, St. Croix 

 River, Wisconsin, and northward. June. 



4. PIIALACROLOMA, Cass. Rays numerous, but nearly in a sinr/le rota, 

 conspicuous : pappus plainly double, the outer a crown of minute c/Hiffy-bristlf-form 

 fcales ; the inner of scanty capillary bristles which are deciduous, or entirely n-ant- 

 iny in the r<ty : annuals and biennials. 



6. E. aiiBiuiini, Pcrs. (DAISY FLEABANE. SWEET SCABIOUS.) Stem 

 stout (3 -5 high), branched, teset with spreading hairs: leaves coarsely and 

 sharply toothed; the loivest orate, tapering into a margined petiole; the upper 

 ovate-lanceolate, acute and entire at both ends ; beads corymbed ; rays white, 

 tinged with purple, not twiec the length of the bristly imoluere. (E. lietero- 

 phvllum, Muhf. E. dtrigosum, Bif/cl.) Fields and waste places; a very 

 con non weed. (Nat. in Europe.) June -Aug. 



;ry 



