SoLiDAGO. COMPOSITE- 221 



minutely pubescent.— iVw«. / in jour. acad. Philad. 7. p. 102, Sj-in trans. 

 Amer. pJiil. soc. {n. ser.) 7. p. 327. 



Dry ground, Arkansas, NuUall! Western Juouhiana, Dr. Leavenu-orih! 

 Dr. Hale! Missouri, Dr. Engelmann ! Sept.— Plant 10-18 inches high, 

 rather slender. Radical leaves unknown : the cauline rather crovyded and 

 rigid, roueh, minutely hispid-ciliate, reticulated ; the lowest (sometimes lan- 

 ceolate-elliptical and acute) 2-3 inches long, half an inch wide near the apex ; _ 

 the upper su^cessivelv smaller and more oblong or ovate-lanceolate, and en- 

 tire, mucronulate. Heads rather smaller than in S. uemoralis, crowded. 

 Bracts minute. 



57. jS. scaberrima : stem corymbose at the summit, very scabrous; cauline 

 leaves crowded, ovate or elliptical, closely sessile, rigid, very scabrous, 

 somewhat triplinerved ; the lower coarsely serrate-toothed; the uppermost 

 and the lowest bracts roundish, entire; racemes numerous, recurved, forming 

 a fastigiate compound panicle ; the heads crowded, strongly secund ; disk- 

 flowers and rays each 4-6, the latter very short ; achenia nearly glabrous. 



Texas, Drummond ! — The specimens consist of the upper portion of an 

 apparently large species; the thick and coriaceous leaves 1 to 2 inches long, 

 8-9 lines wide, triplinerved and reticulated, scarcely acute or pointed at 

 either end ; the upper smaller and rounder, closely sessile by a very obtuse 

 base; those of the branches and the lowest bracts small, nearly orbicular. 

 Racemes somewhat elongated. Involucre, &c. as in the preceding. — Differs 

 from the character of S. rotundifolia, DC. in the secund and much spreading 

 racemes, and the sharply toothed lower leaves. It agrees with the preserit 

 group in habit and character ; but the lower leaves are so manifestly tripli- 

 nerved that it might be referred to the following division. 



58. S. nana (Nutt.) : pulverulently canescent ; stems several from a some- 

 what ligneous caudex, simple : radical and lowest cauline leaves spatulate, 

 entire or obscurely serrulate towards the apex, on short petioles ; the others 

 linear, narrowed at the base, sessile, entire, scattered ; panicle thyrsoid-corym- 

 bose; scales of the involucre ovate, obtuse; rays 6-7, rather large; achenia 

 appressed-pubescent. — Nutt. ! in trans. Amer. phil. soc. {n. ser.) 7. p. 327. 



Rocky Mountains near Lewis River, Nuttall .'—About a span high. 

 Leaves obscurely triplinerved, soft, obtuse ; the radical an inch or more in 

 length. Branches of the inflorescence erect; the lower slender, bearing 5-8 

 scarcely secund heads (smaller than in S. nemoralis) towards the summit. 

 Involucre somewhat pubescent. 



59. S. incana: clothed with a close canescent-tomentose pubescence, when 

 old slightly scabrous; stems low, numerous from a suffruticose base; leaves 

 crowded, thick, oval or oblong, mostly obtuse, sessile, triplinerved ; the lower 

 oblong-spatulate, sparingly serrate towards the apex, tapering to the base ; 

 racernes short, glomerate, crowded in a dense thyrsoid oblong panicle, at 

 length somewhat spreading and secund ; scales of the involucre oval-oblong; 

 rays 5-8 ; achenia appressed-pubescent. 



/?. ? leaves cinereous-canescent and somewhat scabrous (not tomentose), 

 lanceolate, acute at both ends, finely and sharply serrate above the middle, or 

 nearly entire; heads mostly smaller; scales of the involucre oblong-linear. 



Prairies between the upper Mississippi and the Missouri, Mr. Nicollet ! 

 (3. Margin of the Lake of the Woods, Mr. Nicollet ! Saskatchawan, Drwrn- 

 mond!' (in herb. Hook.) July-Aug.— Root a slender woody rhizoma, pro- 

 ducing numerous rigid stems, 6-12 inches high, sometimes a little woody at 

 the base. Leaves 1-2 inches long, 5-9 lines wide, equally canescent both 

 sides, velvety when young, less white and somewhat scabrous when older, 

 conspicuously triplinerved, and more or less r«liculate-veined ; the upper 

 obscurely serrate or entire. Racemes very dense, aggregated in a close 

 panicle, at length more or less spreading and secund. Bracts linear. Exte- 



