168 COMPOSITE. 



4. E. ANNUUM, Pers. Daisy Fkahane. 



Sparsely hairy; stem tall: lower leaves ovate, obtuse, coarsely toothed, tapering 

 into a margined petiole ; upper leaves ovate-lanceolate, acute and entire at both ends ; 

 ■rays very narrow. Annual. 



Raids and meadows; very common. June — Oct. Stem 3 to 5 feet high, stout, 

 angular, more or less hirsute, bearing numerous corymbed heads. Rays 100 or 

 more, white, tinged with purple, scarcely the length of the somewhat hisped invol- 

 ucre. 



'5. E. strigosum, Mulil. Strigose Fkahane. 



Stem slender, hairy ; leaves toothed or entire; lower spatulate-lanceolate, 3-nerved 

 tapering to a long narrow petiole; tipper lanceolate; Jieads in panicled corymbs 

 rays narrow-linear. 



Fields and meadows; common. June — Aug. Stem 1 to 3 feet high, angular, fur- 

 rowed with short stiff hairs, and bearing a large, loose corymb. Hays white, twice 

 the length of the minutely hairy involucre. Plant smaller and more simple than 

 the Last, but with longer rays. 



12. DIPLOPAPPUS, Cass. 



! Gr. diploos, double, and pappus, paprpm. the character which distinguishes the gentis 

 from AsteT. 



Heads many-flowered ; ray flowers 8 to 12 in a single se- 

 ries, pistillate ; those of the disk tubular, perfect. Involu- 

 cre with imbricated, appressed, lanceolate or awl-shaped 

 scales, 1-nerved or keeled, destitute of herbaceous tips. Re- 

 ceptacle flat, alveolate (honey-coinb-like). Achenia flat- 

 tish. Pappus double, the outer very short, subulate, the 

 inner long, capillary. — Perennials with entire alternate leaves, 

 and corymbose or simple heads of flowers with cyanic rays and 

 yellow disks. 



1. D. linearifoltus, Hook. Violet Dijilopappvs. 



Stem erect, or somewhat decumbent, roughish; leaves rigil. spreading, linear, 

 strongly 1-nerved, smooth, with very rough margins; heads terminating the simplu 

 slightly hoary branches. 



Dry soil. Aug., Sept. A handsome species S to 20 inches high, several from the 

 sam; woody root, very leafy, purplish. Leaves numerous, rigidly upright or 

 recurved, obtuse, pale beneath, shining above. Head? large for the size of the 

 •plant, solitary and terminal on the branches, with long showy violet-colored rays. 



2. D. umbellate s, Torr. & G-ray. Umbclled Diplopappus. 



Smooth, leafy at the top : leaves lanceolate, elongated, acuminate and tapering at 

 the base; heads very numerous; scales of Vie involucre closely imbricated, obtusely 

 lanceolate. 



Moist thickets, river banks. Aug., Sept. Stem 2 to 5 feet high, bushy at the top. 

 Leaves somewhat rough above, smooth beneath. 3 to 6 inches long, narrow, those 

 of the branches smaller. Heads numerous, in a level-topped corymb. Hays about 

 12, white. 



3. D. amygdalinus, T. & Gr. Almond-leaved Diplopappus* 



Smooth or roughish above, leafy; leaves ovate-lanceolate, acute, abruptly na-rowed 

 at the base; heads numerous ; scales ef the involucre loosely imbricated, obtuse. 



Low grounds. Aug. Resembling the laet, usually lower, rough, and with. 

 l»o*dfir and shorter lewras. 



