198 COMPOSITE. Aster. 



A. SCOpulorum, Gray. Scabro-puberulent and somewhat cinereous : stems tufted, rigid, 

 only a span liigh, terminated by a solitary pedunculate head : leaves short (3 to 6 lines long), 

 rio-id, from oblong to linear or the lowest spatulate, the broader obtuse with an abrupt 

 mucro, callous-margined : involucre broadly campauulate ; its bracts imbricated in about 

 3 series, scabro-puberulent, lanceolate, acuminate : rays half-inch long, light violet : outer 

 pappus sometimes distinctly squamellate. — Proc. Am. Acad. xvi. 98. Ciirijsopsis alpina, 

 Nutt. Jour. Acad. Philad. vii. 34, t. 3, fig. 2. Dijilojiujipiis aljiiims, IS'utt. Trans. Am. Phil. 

 Soc. vii. 304 ; Torr. & Gray, Fl. 1. c. — Rocky Mountains, Montana and Wyoming, to W. 

 Nevada and the border of California ; first coll. by Wijeth. 

 —A- stenomeres, Gr.iy, More slender, 6 to 10 inches high, green, minutely scabrous : soli- 

 tary naked pedunculate head larger : leaves all linear (lialf to full inch long, a line wide), 

 acutely mucronate, hardly margined : involucre broad ; its bracts barely in two moderately 

 unetiual series, linear, acute or acuminate, thinnish, often pubescent : rays pale violet, over 

 half-inch long: outer pappus setulose. — Proc. Am. Acad. xvii. 209. — Rocky Mountains of 

 Montana and Idaho, Burke, Watson. 



* * Head smaller (a third to a quarter inch high) and narrow: the disk- flowers sometimes hardly 

 moi-e numerous than those (12 to 15) of the ray: style-appendages ovate and obtu.se: akeiies 

 less compressed, lightly few-nerved : outer pappus of few or indistinct unequal short bristles. 



- A. ericsefolius, Rothrook. About a span high, strigosely canescent or hispidulous and 

 glandular-scabrous, much branched : branches erect or diffuse, terminated by somewhat 

 pedunculate heads : leaves commonly hispid-ciliate, erect or little spreading, 3 to 6 lines 

 long ; lowest spatulate and tapering iuto a petiole ; upper from linear to nearly filiform, 

 piliferous-mucronate : bracts of the involucre in about 3 series, lanceolate, acute or apiculate, 

 thinnish, scarious-margined : rays purple or violet, sometimes white. — Rothrock in Bot. 

 Gazette, ii. 70, & AVheeler Rep. vi. 152. Inula'? ericoides, Torr. in Ann. Lye. N. Y. ii. 212. 

 Eucephalus c-rirnides, Nutt. in Traus. Am. Phil Soc. 1. c. 299. Dijili/jiajms ericoides, Torr. &, 

 Gray, PI. ii. 182; Gray, T'l. Feudl. 69, var. lurtnllu, a hispid form. — Dry hills, Kansas and 

 Texas to Utah, Arizona, aud border of California; first coll. by James. (Adj. Ilex.) 



Var. tenuis, Gray. Much less or not at all hispid : branches filiform and diffuse : 

 all the upper leaves minute. — New Jicxico, Wright, &c. (Adjacent Mex. to San Luis.) 



§ 10. Orthomeius. Pappus simple: bracts of the involucre imbricated and 

 appressed, destitute of foliaceous or herbaceous tips, often scarious-edi;ed or more 

 or less Ary : rays fertile. — Gray, Proc. Am. Acad. xvi. 98. § Orthomeris with 

 part of § OxijtripoUmn, Torr. & Gray, Fl. ; Benth. & Hook. Gen. 1. c. 



* Involucre well imbricated, of small and narrow bracts, greener than in others of this section 

 (much as in Aster proper) : low and slender herbs (a foot or less high), lcaf\ -siennned, branch- 

 ing above; ivith mostly linear erect aud entire leaves, and several small white-i-ayed heads: 

 akenes somewhat 4-5-angIed or nerved. 



A. ptarinicoides, Torr. & Gray. Rather rigid, 6 to 20 inches high in a tuft from sliort 

 aud thickish r(3otstocks, from smooth or minutely scabrous to hirtellous-puberulent, bearing 

 a corymbiform cyme of several or numerous heads : leaves of firm texture, linc:ir or the lower 

 spatulate-lanceolate, lucid both sides, the broader ones nervose : bracts of the campauulate 

 or somewhat turbinate involucre oblong-lanceohite, obtuse, thickisli, ratlipr ri^id : ra\s 2 to 

 4 lines long, bright wliite, broadish: style-appemhiges arutely lanceolate-subulate: pappus 

 white, of ratlier rigid bristles, longer ones manifestly clavellate tit tip : akeiies verx- glabrous 

 hardly at all compressed. — PL ii. 160. Clin^so,,,i., alba. Nutt. (icu. ii. 152. Ihrilinneria 

 ptaruuroules, Sees, A^t. \sn. Dipiopappus a!!,„s. Uook. F\. i\. 21. fLIrastrum nibnm DC. 

 Prodr. V. 264, exol. syn. WiUd. A^tcr nlhus, Eaton & J. Wri-lit, M:iu. Bot. 146 not ^\■^m. 

 herb. & Spreng. Syst. (which is A. Amellus). Eureplmlus attms, Xutl. Ti:ins Vm Phil Soc 

 vii. 299. -Rocky banks and bluffs, W. New England (S, Iladh-;-, JIass.) to Illinois tlte Sas- 

 katchewan, and the mountains of Culor.ado ; first coll. by Xuttall. Depauperate i.Iants some- 

 times only 2 or 3 inches high, and mouocephahius. 

 =- Var. Georgianus, Gnvv. Tailor and slender, ,.vcr 2 feet high : lowest leaves 5 or 6 

 inches long, sometimes with 2 or 3 coarse dcniirulatious : hea<ls and ravs rather .small — 

 Proc Am, Acad, xvi. 98; Cbapm, Fl, Suppl, 627, -Upper Georgia, near Rome, Chapman. 

 Nearly the same from open woods of N. W. Arkansas, F. L. Harcej. 



