MACRONBMA. COMPOS ITjE 301 



8. acaulis Nutt. Trans. Am. Phil. Soc. vil, 384. Aplopnppus acaulis 

 Gray. Depreeaed-cespitose from a multicipital lignescent caiiiiex : leaves 

 rigid and persistent, crowded on the crown of the caudex and a 

 few on the scapiform flowering stems, from spatulate to oblanceo- 

 late or linear, J-3 inches long mucronate more or less 3-nerved Commonly 

 scabrous: scapiform flowering stems 1-10 inches high: heads mostly soli- 

 tary, many-flowered, radiate: bracts of the involucre from ovate to ovate- 

 lanceolate, mucronately acute or acuminate, destitute of greenish tips 

 the outer a little shortest: style appendages subulate: achenes canescent- 

 ly villous. Dry rocks on the mountains at 600U-8y0a feet, eastern Oregon tO' 

 California and .'Saskatchewan. 



S. stenophyllus Greene Eryth. ii, 72. Aplopappus stenophylivs Gfray. 

 Hirtellous-scabrous ; suffruticulose spreading : stems numerous 1-3 inches 

 long: leaves very narrow, linear-spatulate to filiform, 6-12 lines long 1- 

 nerved persistent : scapiform peduncles 1-2 inches long : , heads solitary, 

 radiate: involucre 6 lines high, its bracts linear, equal, in 1 or 2 series 

 glandular puberulent: style appendages subulate :achenes canescently vil- 

 lous. On rocky ridges, eastern Washington to northeastern California 

 and Idaho 



9 MACRON EM A Nutt, Trans. Am. Phil. Soc. vii, 322. 



Low and viscidly-pubescent much branched shrubby plants, 

 the fastigiate leafy branches terminated by solitary rather large 

 heads, with entire sessile leaves and yellow flowers. Heads 

 many-flowered, the rays 6-8, ligulate, pistillate, or none : disk- 

 flowers tabular, perfect. Bracts of the involcre few, loose, some- 

 what in two series, nearly equal, linear-lanceolate, 1-nerved, 

 the exterior mostly with foliaceous spreading tips, commonly 

 with one or more foliaceous bracts at the base resembling the 

 upper leaves. Receptacle flat, areolate. Branches of the style 

 much exserted, the appendages elongated, subulate, hirsute, 

 much longer than the flat stigmatic partion. Achenes large, 

 much compressed. Pappus of copious somewhat unequal scab- 

 rous capillary bristles. 



M. snlfraticosa Nutt. 1 c Aplopappus sHjfr"tioosus Gray. Stems 6-8- 

 inches long from a low woody base, leafy to the summit: leaves oblong- 

 linear to lanceolate, acute, somewhat narrowed toward the base, 12-18 

 lines long by about 2 lines broad : heads mostly solitary, teminating the 

 branches: involucre simple' and loose, 8-1') lines high, its bracts mostly 

 with foliaceous tips : ray-flowers '-i-S linear-oblong, pistillate : achenes ob- 

 long or slightly obovate. flat, l-3-nerved o • each side: pappus ferruginous. 

 In the mountains of eastern i >regon to California and Wyoming 



M. molle Greene Eryth ii, 73. Aplopappus Greenei far molUx Gray. 

 Cinereous- pubescent to canescent-tomentose, even to the involcure: 

 branches about a foot high from a shrubby base: leaves somewhat lance- 

 olate, 6-12 lines long, 2-3 lines broad : heads solitary or few and crowded, 

 6 lines high bracts of the involucre in about three series, lanceolate, all 

 more or less foliaceous : ravs 2-7, 3-4 lines long; disk flowers 10-16. In the 

 mountains of eastern Oregon and Washington. 



M. Greenei Greene 1. c. Aplopappus Greenei Gray. Glabrous or 

 a^ove very obscurely viacid-puberulent, about a foot high, branching from a 

 shrubby base : leaves spatulate-oblong to somewhat lanceolate, 6-12 line* 

 Jong, 2-3 lines broad, obtuse or mucronate: heads solitary or few and 

 crowded, half inch high: bracts of the involucre in about 3 series, lance- 



