Order 70. — COMPOSITE. 419 



Lv.i. 1 to IV long, 5 as wide. Fl3. 20 to 50 in a head, of a beautiful sky bluo, 

 reddish in Hiding. Aug., Sept. 



13. TUSSILA'GO, Tourn. Colt's-foot. (Altered from the Lat. 

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

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

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

 very narrow rays. 



T. firfara L. A low plant in wet places, brooksides, N. and M. States, and is a 

 certain indication of a clayey soil. Scapo scaly, about 5' high, simple, appearing 

 with its single, terminal, many-rayed, yellow head in March and Apr., long befora 

 a loaf 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 be- 

 neath, and on downy petioles. § ? 



14. HARDOS'MIA, Cass. (Gr. vdpSog, spikenard, 6g^i), 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. palmata Hook. Scapo with a fastigiato thyrso or corymb; lvs. roundish-cor- 

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

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

 rare. A coarse, acauleseent plant, with large, deeply and palmately-lobed leaves, 

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

 rant, numerous, with obscure rays, tho30 of the- barren plants almost inconspicu- 

 ous. May. 



15. ADEKOCAITLON, Hook. (Gr. ddrjv, a gland, icavXSg, a stem ; 

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

 lar, tabular ; 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. — 2f. Nearly acauleseent, with alter- 

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



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

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

 neath. — Shores of L. Superior (Dr. Pitcher, fide T. &, G.), to Oreg. (Ilook). Sta 

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



Trids 3. ASTEROIDILE. 



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

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

 ile, ligulatc; 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. Kays cyanic. 

 G. hyssopifolia 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-tipped Aster. (Gr. crjpiKdg. 

 silken, nap-6g, 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, 



