OEDsa 70.— OOMPOSTTjE. 419 



tvs. 1 to 2J' long, § as wide. Fls. 20 to 50 ia a head, of a beautiful sky blue, 

 reddish in fading. Aug., Sept. 



13. TUSSILA'GO, Toum. Colt's-poot. (Altered from tlic Lat 

 tu8sis, cough ; considered a good expectorant.) Head radiate, many- 

 flowered ; flowers of the ray ? , those of the disk $ ; involucre simple ; 

 receptacle naked ; pappus capillary. — 2^ Lvs. radical. Fls. yellow, with 

 very narrow rays. 



T. f^fara L. A low plant in wet places, brooksideg, X. and M. States, and is a 

 certain indication of a clayey soil. Scape scaly, about 6' liigh, simple, appearini; 

 with iia single, terminal, many-rayed, yellow head in March and Apr., long beforo 

 a leaf is to be seen. Lvs. arising after the flower ia withered, 5 to 8' by 3 to (J , 

 cordate, angular, dentate, dark green above, covered with a cottou-liko down be- 

 neath, and on downy petioles. § ? 



14. NARDOS'MIA, Cass. (Qr. vdpSog, spikenard, dajiri, smell ; from 

 the fragrance.) Heads radiate, many-flowered, somewhat $ $ ; flowers 

 of the ray $ , of the disk i^ , but abortive in the sterile plant ; involucre 

 simple; receptacle flat, naked; pappus capillary. — 2[ Lvs. radical. Fls. 

 cyanic. The i-ay flowers of the sterile heads are in a single row ; of tho 

 fertile heads in severalj but very narrow. 



W. palmdta Hook. Scape with a fastigiate thyrse or corymb ; lvs. roundish-cor- 

 date, 5 — 7-lobed, tomentous beneath, the lobes coarsely dentate. — In swamps, 

 Pairhaven, Vt. (Robbins), Sunderland, Mass. (Hitchcock) W. to R. Mts. Very 

 rare. A coarse, acaulescent plant, with large, deeply and palraately-lobed leaves, 

 and a stout scape covered with leaf-scales and 1 — 2f high. The heads are frag- 

 rant, numerous, with obscure rays, those of tho barren plants almost inconspicu- 

 ous. May. 



15. ADENOCAU^LON, Kook. (Gr. ddTjv, a gland, icavAog, a stem ; 

 i. c, glands stipitate.) Heads discoid, few-flowered ; corollas all simi- 

 lar, tubular; flowers of the margin ?, of the disk $; scales of the invo- 

 lucre equal, in one scries; receptacle naked; cypsela clavate, bearing 

 stalked glands above ; pappus none. — 2|! Nearly acaulescent, with alter- 

 nate lvs. and small, paniculate hds., also gland beaiing. 



A. bioolor Hook. St. leafy below, nearly naked above ; lvs. deltoid, cordate, an- 

 gular-toothed, decurreut on the petioles, glabrous above, arachnoid-pubescent be- 

 neath.— Shores of L. Superior (Dr. Pitcher, fide T. & G.), to Orog. (Hook). Sts. 

 1 to 2f high, slender. FJs. white. 



Tribe 3. ASTEEOmE^. 



16. GALATEL'LA, Cass. (Lat. diminutive of Galatea,, from which 

 genus this was taken.) Heads many-flowered; rays few (3 to 12) ster- 

 ile, ligulate ; disk-flowers ij , 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. — !(. Herbs corymbed, with alteniate lvs. Rays cyanic. 

 Or. hyssopifdlia Nees. Glabrous, erect, lvs. lance-linear, acute, 3-veined, en- 

 tire ; 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. com- 

 mon." (Darby.) Height 1 to 2f. Eays, pale purple. Aug. — Oct. 



17. SERICOCAR'PUS, Nees. White-tipped Astep. (Gr. arjpiKdc. 

 silken, naprrdg, fruit.) Heads few-flowered ; ray flowers 4 fo 6, ? ; disk- 

 flowers 6 to 10, !^ ; involucre oblong, imbricated ; scales appressed, 

 white, with green spreading tips ; receptacle alveolate ; achenium obconic. 



