20. ERIG'ERON, L. Flea-bane. White-weed. (Gr.Suborders And Tribes Part 13 862 , the spring, Suborders And Tribes Part 13 863 , old man ; because it is soon hoary.) Heads many-flowered, sub-hemispherical ; ray-flowers ♀, very numerous (40 to 200), narrow, linear; flowers of the disk Suborders And Tribes Part 13 864 ; receptacle flat, naked ', scales of the involucre nearly in one row and equal; pappus generally simple. - Herbs with alternate lvs. Rays cyanic. Disk yellow.

§ Rays minute, shorter than the cylindrical involucre. Pappus simple......

......Nos.1,2

§ Rays long,showy, 30 to 40. Pappus simple. Leaves all radical....................................................................

....No.3.

§Rays long, showy, 50 to 200.-

- Pappus simple. Leaves clasping...............................................

.....Nos. 4 - 6

- Pappus double. Leaves sessile, etc...........

.....Nos. 7 9

1 E. Canadense L. Invol. oblong; rays numerous (40 - 50), crowded, minute; pappus simple; st. hairy, paniculate; lvs. lanceolate, lower ones subserrate. - A very common annual plant of no beauty, growing by roadsides and in fields, throughout K. Am. Stem 1/2 - 9fl high, branching, hairy and furrowed. Leaves very narrow, with rough edges. Flowers white, very numerous, small, of mean appearance, irregularly racemous upon the branches, and constituting a large, oblong panicle. The plant varies greatly in size, according to the soil - A starved form is E. pusillum Nutt.

2 E. divaricatum Mx. Decumbent and diffusely branched, hirsute; lvs. linear and subulate; hds. very small, loosely corymbous; rays minute. - Dry soil, W. States S. to La. Plant of a greyish or bluish aspect, 3 - 6' high, but at length spreading 1 - 2f. Leaves 4 - 12" by 1/2 - 1". Rays purplish. June - Aug.

3 E. nudicaule Mx. Glabrous; lvs. obovate or spatulate, radical, rosulate, entire ; one or two sessile, bract-like on the simple stem or scape; hds. few, corymbous ; invol. hemispherical; rays narrow, 30 or more, conspicuous. - Pine barrens, Va. to Fla. and La. Lvs. about 2' long. Scape 18' high, very slender. Rays white. May, Jn.

4 E. bellidifolium Muhlenb. Robins' Plantain. Hirsute; radical lvs. obo-vate, obtuse, subserrate; st. lvs. remote, mostly entire, lance-oblong, acute, clasping; hds. 3 - 7, in a close, terminal corymb; rays 50 to 60, nearly twice longer than the involucre, linear-spatulate. - Dry fields and thickets, U. S. and Can. Stem erect, simple, sometimes stoloniferous, 1 - 2f high. Leaves 2 - 3' by 6 - 9", mostly broadest above the middle. Rays bluish (rarely reddish)-purple. This is our earliest species, flowering in May and June. Resembles the following. (E. pulchel-lum Mx.)

5 E. Philadelphicum L. Pubescent or hirsute; lvs. thin, lower spatulate, ere-nate-dentate, upper oblong-oblanceolate, narrowed to the clasping (sometimes cor-date-auriculate) base, subserrate; hds. few, on long, slender ped.; rays 150 to 200, filiform, more than twice longer than the invol. - Woods and pastures throughout N. Am. St. slender, 1 to 3f high. Lvs. 2 to 4' by 6 to 9", lower much attenuated at base, upper acute. Rays reddish-purple or flesh-colored, nearly as slender as hairs. Jn. - Aug.

. ricardi. Cauline lvs. cordate-ovate. Meriden, N.H.. (Ricard). y. St. stout, with coarsely serrate lvs., approaching the next.

6 E. quercifolium Lam. Pubescent; rt. lvs. oblong-obovate, lyralc-pinnatifid, or deeply sinuate-toothed, the cauline sharply serrate, clasping; upper entire; hds. small, numerous, corymbous, with innumerable filiform rays, twice longer than the invol. - S. Car. to Fla. and La. Dilfers from the preceding in its smaller and more numerous hds. as well as its lvs. Rays pale purple. Mar. Jn.

7 E. annuum Tors. Common Fleabane. White-weed. Hirsute, with scattered hairs, branching; lvs. coarsely serrate, the lowest ovate, contracted at base into a winged petiole, stem leaves ovate-lanceolate, sessile, acute, the highest lanceolate; rays very numerous and narrow; pappus double. - A common weed, in fields and waste grounds, Can. to Penn. and Ky. Stem thick, 2 - 4f high, striate, terminating in a large, diffuse, corymbous panicle of large heads. Rays white or purplish, 100 or more, short. Jn. - Aug. (E. heterophyllum Muhl.)

8 E. strigosum L. Plant, rough, with short, appressed hairs, or nearly smooth; lvs. lanceolate, tapering w each end, entire, or wi th a few large teeth in the middle, lower ones 3-veined and petiolate; pan. corymbous; pappus double. -A rough weed, in grassy fields, Can. and U. S. St. about 2f high, slender, furrowed, with close, short, stiff hairs, and bearing a large, loose corymb. Lvs. also with close-pressed bristles, sessile. Rays very narrow, white. Jn. - Oct.

. St. simple, smooth; lvs. entire, pubescent; fls. corymbed; rays 100 to 158. (E. integrifolium Bw.)

9 E. glabellum Nutt. Lvs, smooth, entire, spatulate, long-iapering at base, upper lanceolate and lance-linear, sessile, acuminate; hds. 4 to 6, corymbed; invol. hemispherical, pubescent as well as the peduncles; rays very numerous, pale-blue. - Wis. to Nebr. 12 to 18' high. Lvs. long and narrow. Ravs 100 or more. JL, Aug.

21. CALLIS'TEPHUS, Cass. China Aster. (Gr.Suborders And Tribes Part 13 865 , beauty, Suborders And Tribes Part 13 866 , a crown ; characteristic of the pappus.) Ray-flowers ? , numerous ; disk-flowers Suborders And Tribes Part 13 867 ; involucre hemispherical; receptacle subconvex : pappus double, each in 1 series, outer series short, chaffy-setaceous, with the setae united into a crown ; inner series of long, filiform, scabrous, deciduous bristles. - (1) Exotics. Lvs. alternate.

C. Chinensis Ness. St. hispid; branches divergent, 1-flowered; lvs. ovate, coarsely dentate, petiolate, cauline ones sessile, cuneate at base. - Said to be originally from China. Stem about 18' high, with long branches, each terminated by a single, large head. Rays dark purple. Disk yellow. July - Sept. - Cultivation has produced many beautiful and even splendid varieties, double and semi-double, with white, blue, red, flaked and mottled rays, † (Aster Chinensis L.)

22. BEL'LIS, L. Garden Daisy. (Lat. bellus, pretty ; a term quite appropriate to the genus.) Heads many-flowered ; rays $ ; disk