COMPOSITE. Aster. 



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

 'only a span high.'terminated by a solitary pedunculate head : leaves short (3 to G lines long), 

 rigid, from oblong to linear or the lowest spatulate, the broader obtuse with an abrupt 

 mucro, callous-margined : involucre broadly campaimlate ; 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. i.'nrysopsis alpina, 

 Nutt, Jour. Acad. Philad. vii. 34, t. 3, fig. 2. Dlplopappus al punts, Nutt. 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 Wyeth. 



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

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

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

 unequal scries, linear, acute or acuminate, thiuuish, 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 

 more numerous than those (12 to 15) of the ray: style-appendages ovate and obtuse: akeues 

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



A. eric8f61ius, ROTHROCK. About a span high, strigosely cauescent or hispidulous aud 

 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 into a petiole ; upper from linear to nearly filiform, 

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

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

 (iazette, ii. 70, & Wheeler Rep. vi. 152. Inula? ericoides, Torr. in Ann. Lye. N. Y. ii, 212. 

 Encephalus ericoides, Nutt. in Trans. Am. Phil. Soc. 1. c. 209. Diplopappus ericoides, Torr. & 

 (ri\iy, Fl. ii. 182; Gray, PI. Feiidl. 69, var. I//r!c//<i, a hispid form. Dry hills, Kansas and 

 Texas to Utah, Arizona, aud border of California; first coll. by ./</// s. (Adj. Mex.) 



Var. tenuis, GRAY. Much less or not at all hispid: brandies filiform and diffuse: 

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



10. ORTHOMERIS. Pappus simple: bracts of the involucre imbricated and 

 apprised, destitute of foliaceous or herbaceous tips, often scarious-edged or more 

 or less dry : rays fertile. Gray, Proc. Am. Acad. xvi. 98. Orthomeris with 

 part of OxytripoUum, Torr. & Gray, Fl. ; Bentli. & Hook. Gen. 1. c. 



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

 (much as in A.-tttr proper) : low and slender herbs (a foot or loss high), leafy-stemmed, branch- 

 ing above; with mostly linear erect and entire leaves, and several small white-rayed heads: 

 akenes somewhat 4-5-angled or nerved. 



A. ptarmicoid.es, TORR. & GRAY. Rather rigid, 6 to 20 inches, high in a tuft from short 

 and thickish rootstoeks, from smooth or minutely scabrous to hirtellou-i-puberulent, bearing 

 a corvmbiform cyme of several or numerous heads : leaves of firm texture, linear or the lower 

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

 or somewhat turbinate involucre oblong-lanceolate, obtuse, thickish, rather rigid : rays 2 to 

 4 lines long, bright white, broadish : style-appendages acutely lanceolate-subulate: pappus 

 white, of rather rigid bristles, longer ones manifestly clavellate at tip : akenes very glabrous, 

 hardly at all compressed. Fl. ii. 160. Cltri/sopsis alba, Nutt. Gen. ii. 152. DivUingena 

 1>t<irini<-t,'iilrs, Nees, Ast. 183. D/j>}<>j><i/>pnx allius, Hook. Fl. ii. 21. II<-lxtnun <tU>um, DC. 

 1'rodr. v. 264, excl. syn. Willd. Aster aJbus, Eaton & J. Wright, Man. Bot. 146, not Willd. 

 hrrk & Sprcng. Syst. (which is .1. A/it</lns). Bucephalus albus, Nutt. Trans. Am. Phil. Soc. 

 vii. 299. Rocky banks and bluffs, W. New England (S. Iladley, Mass.), to Illinois, the Sas- 

 katchewan, and the mountains of Colorado ; first coll. by Xn/talL Depauperate plants some- 

 times only 2 or 3 inches high, and nionocephahms. 



Var. GeorgiariUS, GRAY. Taller and slender, over 2 feet high : lowest leaves 5 or 6 

 inches long, sometimes with 2 or 3 coarse deuticulations : heads and rays rather small. 

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

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



