102 LEAFIEM. 



obloag to elliptical, merely acute, thin, light-green, both fac68 

 with scattered minute straight hairs, the midvein-beneath and 

 the margins more or less retrorsely hispidulous : calyx strongly 

 10-nerved, the nerves hirtellous, the teeth long-pointed from a 

 deltoid base. 



Exclusively of the Great Basin, chiefly in western Nevada; 

 fine specimens iu U. S. Herb, from near Reno, by M. E. Jones, 

 June, 1897; also by L F. Ward, from Aquarius Plateau, Utah, 

 39 July, 1875 ; also at other stations in western Utah by M. E. 

 Jones, in 1894. 



* * * Species of the Rocky Mountain region ; all with some 

 retrorse pubescence. 



11. A. .ToNESii. Decumbent, widely branching 6 or 8 inches 

 high, the cymg rather distinct but copiously leafy-bracted, lower 

 iuteruodes retrorsely hirtellous (uot- villous), all the upper ones 

 clothed with spreading hairs all tipped with an uncommonly 

 large gland: leaves obovate-elliptic to elliptic and elliptic-lan- 

 ceolate, li to 2 inches long, acute, thin, deep green, conspicu- 

 ously and closely muriculate-punctate, the points rarely ending 

 in a short hair, both faces usually glabrous, only midvein be- 

 neath, and mirgins uncinate-aculeolate; the ovate and lauce- 

 ovate small bracts of the cyme glandular-scabrous, as also the 

 short pedicels and calyx ; teeth of the latter deltoid, acute, the 

 tube not strongly nerved. 



Mountain districts of northeastern Utah and to middle Colo- 

 rado and northsrn Wyoming; the type in U. S. Herb, by M. E. 

 Jones, American Pork Caflon, Utah, 28 July, 1880 ; fragments 

 of apparently larger specimens from Ogden, 1885, by Letterman. 



12. A. Bakbri. Low, slender, diffuse though a little rigid 

 and wiry, the tufted stems 3 to 5 inches, mostly simple up to 

 the small and few-flowered but distinct cyme; internodes short, 

 less than an inch long, rough with short stiff deflexed hairs : 

 leaves longer, spreading or ascending, narrowly oblanceolate, 

 acute or acuminate, more or less muriculate-scabrous, the mid- 



