Lvs. 1 to 2 1/2' long, 2/3 as wide. Fls. 20 to 50 in a head, of a beautiful sky blue, reddish in fading. Aug., Sept.

13. TUSSILA 'GO, Touro. Colt's-foot. (Altered from the Lat. tussis, cough; considered a good expectorant.) Head radiate, many-flowered ; flowers of the ray , those of the disk ♂ ; involucre simple; receptacle naked ; pappus capillary. - Ц Lvs. radical. Fls. yellow, with very narrow rays.

T. farfara L. A low plant in wet places, brooksides, N. and M. States, and is a certain indication of a clayey soil. Scape scaly, about 5' high, simple, appearing with its single, terminal, many-rayed, yellow head in March and Apr., long before a leaf is to bo seen. Lvs. arising after the flower is withered, 5 to 8' by 3 to 6, cordate, angular, dentate, dark green above, covered with a cotton-like down beneath, and on downy petioles. § ?

14. NARDOS'MIA, Cass. (Gr. , spikenard, , smell ; from the fragrance.) Heads radiate, many-flowered, somewhat ; flowers of the ray ♀ , of the disk , but abortive in the sterile plant; involucre simple; receptacle flat, naked ; pappus capillary. - Ц. Lvs. radical. Fls. cyanic. The ray flowers of the sterile heads arc in a single row ; of the fertile heads in several, but very narrow.

N. palmata Hook. Scape with a fastigiato thyrse or corymb; lvs. roundish-cordate, 5 - 7-lobed, tomentous beneath, the lobes coarsely dentate. - In swamps, Fairkaven, Vt. (Robbins), Sunderland, Mass. (Hitchcock) W. to R. Mts. Very rare. A coarse, acaulescent plant, with largo, deeply and palmately-lobed leaves, and a stout scape covered with leaf-scales and 1 - 2f high. The heads are fragrant, numerous, with obscure rays, those of the barren plants almost inconspicuous. May.

15. ADEN0CAU'L0N, Hook. (Gr. , a gland, , a stem ; i. c., glands stipitate.) Heads discoid, few-flowered; corollas all similar, tubular; flowers of the margin ♀, of the disk ♂ ; scales of the involucre equal, in one series; receptacle naked; cypsela clavate, bearing stalked glands above ; pappus none. - Ц Nearly acaulescent, with alternate lvs. and small, paniculate hds., also gland bearing.

A. bicolor Hook. St. leafy below, nearly naked above; lvs. deltoid, cordate, angular-toothed, decurrent on the petioles, glabrous above, arachnoid-pubescent beneath. - Shores of L. Superior (Dr. Pitcher, fido T. & G.), to Oreg. (Hook). Sts. 1 to 2f high, slender. Fls. white.

Tribe 3. ASTEROIDEae.

16. GALATEL'LA, Cass. (Lat. diminutive of Galatea, from which genus this was taken.) Heads many-flowered; rays few (3 to 12) sterile, ligulate; disk-flowers £ , tubular ; scales closely imbricated, without green tips; receptacle alveolate, toothed ; corollas of the disk deeply 5-cleft; achenia silky-villous; pappus simple, copious, capillary, that of the ray similar. - Ц Herbs corymbed, with alternate lvs. Rays cyanic. G. hyssopifdlia Nees. Glabrous, erect, lvs. lance-linear, acute, 3-veined, entire ; invol. ovoid, half as long as the disk; interior scales obtuse, membranous, outer acute, fleshy; rays 3 to 9, longer than the disk. - " Md. Car. and Ga. common." (Darby.) Height 1 to 2f. Rays, pale purple. Aug.- Oct.

17. SERICOCAR'PUS, Nees. White-tipped Astek. (Gr. silken, , fruit.) Heads few-flowered ; ray flowers 4 to 6, ? ; disk-flowers 6 to 10, ; involucre oblong, imbricated ; scales appressed, white, with green spreading tips; receptacle alveolate; achenium obconic, very silky ; pappus simple. - Ц Herbs with alternate lvs. and close corymbs. Kays white.

S. solidagineus Nees. Smooth; lvs. linear-oblanceolate, obtuse, entire, sessile, obsoletely 3-veined, rough on the margin; corymb fastigiate; hds. aggregate, subsessile, 5-rayed; scales obtuse, white, with green tips; pappus white. - In woods, Can to La. Very elegant. Sts. clustered, slender, simple, about 2f high. Lvs. smooth, 1 to 2' by 3 to 5". Hds. small (3" long). Invol. oblong. Scales with conspicuous green tips. Rays long, white. Jl., Aug. (Aster solidaginoidee Mx.)

2 L. conyzoides Nees. St. somewhat pubescent, simple, corymbus at top; lvs-oval-lanceolate, smooth beneath, slightly 3-veined, narrowed at base, acute, the upper ones sessile, nearly entire, the lower narrowed into the petiole, serrate ; invol. cylindrical, the scales oval, obtuse, appressed, slightly renexed at summit; rays 5, short, pappus rusty. - Common in woods and thickets, Mass to Flor. Stems somewhat 5-angled, 1 - 2f high. Leaves somewhat fleshy. Ray short, but longer than the disk, white. July, Aug. (Aster Willd. Conyza aster-oides L.)

3 S. tortifolius Nees. Grayish-pubescent, roughish, corymbous above; lvs. short, oblong-obovate, sessile, twisted to a vertical position, and both sides alike minutely scabrous; scales regularly imbricated in many rows, the green tips slightly spreading; pappus white. - Dry woods and barrens, Va. to Fla. and La. Height about 2f, often branched below. Lvs. 8 to 12" long, obtuse or acute. Hds. larger than in the others, about 5" long. Sept., Oct.

i8. AS'TER, L. (Gr. , a star; from the radiated flowers.) Hds.

radiate; involucre oblong, imbricate; scales loose, often with green tips, the outer spreading; disk flowers tubular, ; ray flowers $ , in one row, generally few (6 - 100), lignlate, oblong, 3-toothed at apex, finally revolute ; receptacle flat, alveolate ; pappus simple, capillary, scabrous ; achenium usually compressed. - A large genus of Ц herbs, very abundant in the U. S., flowering in late summer and autumn. Lvs. alternate. Disk fls. yellow, changing to purple, ray flowers blue, purple or white, never yellow.