Order 70.— COMPOSITjE. 419 



Lvs. 1 to 51 J' long, § as wide. Fis. 20 to 50 iu a UeaJ, of a beautiful aky blue, 

 reddish in fading. Aug., Sept. . ' 



13. TUSSILA'GO, Tourn. 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. — It Lvs. radical. Fls. yellow, with 

 very narrow rays. 



T. fdrfara L. A lev/ plant in wet places, brooksides, K and M. States, and is a 

 certain iudioatiou 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 be seen. lvs. arising after the flower is withered, 5 to 8' by 3 to C, 

 cordate, angular, dentate, dark green above, covered with a cjtton-Iiko down be- 

 neath, and on downy petioles. § ? 



14. NARDOS'ffllA, Cass. (Gr. vcp.'Joj-, spikenard, (5(7^^, 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. — 21 Lvs. radical. Fls. 

 cyanic. The ray flowers of the sterile heads are in a single row ; of the 

 fertile heads in several, but very narrow. 



N. palm^ta Hook. Scape with a fastigiate thyrse or corymb ; lvs. roundish-cor- 

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

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

 rare. A coarse, aoaulescent plant, with large, deeply and palmately-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 the barren plants almost inconspicu- 

 ous. May. 



15. ADENOCAU^LON, Hook. (Gr. ddrjv, a gland, KavXSg, a stem ; 

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

 lar, tubular ; flowers of the margin 5 , of the disk $ ; scales of the invo- 

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

 stalked glands above ; pappus none. — 21 Nearly acaulcscent, with alter- 

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



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 Oreg. (Hook). Sts. 

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



Teibe 3. ASTEROIDE.^. 



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 ^ , 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. — If Herbs corymbed, with alternate lvs. Rays cyanic. 

 G. 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. Rays, pale purple. Aug. — Oct. 



17. SERICOCAR'PUS, Nees.' WHitE-iippED Astee. (Gr. aripiK6g. 

 silken, Kapmg, 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, 



