Aplopappus. COMPOSITE. 



1. A. squarrosus, Hook. & Arn. Shrubby, minutely pubescent an.d some- 

 what glutinous : branches very leafy : leaves rigid, oblong-obovate, obtuse, thickly 

 serrate with rigid pointed teeth, closely sessile or partly clasping, the midrib promi- 

 nent and the veins indistinct : heads several, spicate or racemose-clustered, elon- 

 gated-obconical : the linear coriaceous scales of the involucre regularly imbricated in 

 many series, all with short and obtuse glandular herbaceous tips, which are usually 

 squarrose-spreading : rays none : disk-flowers numerous : appendages of the style 

 ovate-lanceolate : akenes glabrous : pappus rather scanty, rigid. Pyrrocoma grin- 

 delioides, DC. 



Probably near Monterey ; collected only by Douglas. Leaves an inch long. Heads three 

 quarters of an inch : outer scales of the involucre very short ; iuner successively longer ; inner- 

 most equalling the disk. 



2. A. linearifolius, DC. Shrub one to four feet high, much branched, nearly 

 glabrous, glutinous from a resinous exudation ; the branches slender, terminated by 

 a solitary pedunculate large and showy head : leaves much crowded, narrowly 

 linear, mostly tapering to each end, fully an inch long, entire, more or less punc- 

 tate : scales of the hemispherical involucre about in two series, all nearly equalling 

 the disk, oblong-lanceolate, acute or acuminate, thin, with scarious margins and no 

 herbaceous tip : rays 12 to 14, oblong-lanceolate : disk-flowers numerous : akenes 

 white silky-villous ; pappus bright white, rather soft and deciduous. Stenotus 

 linearifolius, Torr. & Gray, Fl. ii. 238. 



Rocks and diy ridges, Monte Diablo and the Contra Costa range, and in the Sierra Nevada 

 (Mono Pass, &c.), extending to S. Utah. Head almost an inch in diameter ; the bright yellow 

 rays nearly an inch long. Appendages of the style rather broad. 



3. A. acaulis, Gray. Depressed : suffruticose caudex csespitose, bearing rosu- 

 late tufts of leaves : the flowering shoots simple and scape-like, or leafy only below, 

 terminated by a solitary head : leaves oblanceolate or narrowly spatulate, entire, 

 mucronate-acute, rigid, about 3-nerved, veiny, pale, scabrous with a very minute 

 harsh pubescence : scales of the hemispherical involucre rather few in 2 or 3 series, 

 ovate, acute, chartaceous with more or less scarious edges and a carinate midrib : 

 rays 9 to 12 : disk-flowers rather numerous : akenes silky-pubescent : pappus white, 

 rigid and rather scanty. Proc. Am. Acad. vii. 353. Stenotus acaulis, Nutt. I.e. 

 Aplopappus Nevadensis, Kellogg, Proc. Calif. Acad. iii. 9, a large form. 



High Sierra Nevada, at Summit (Bolander, Kellogg, &c.), and in similar stations east to the 

 Eocky Mountains. Flowering stems or scapes 2 to 4 inches high. Heads a third of an inch 

 long : rays half an inch. Lassen's Peak, Lemmon. 



4. A. apargioides, Gray. Herbaceous, tufted from a thick and firm rootstock, 

 glabrous except some scattered slender and usually deciduous hairs : flowering stems 

 slender, a span high, bearing solitary or 2 to 3 peduncled heads : leaves lanceolate 

 or linear in outline, laciniately pinnatifid or spinulosely toothed, one-nerved and 

 minutely reticulate-veiny ; the radical ones 3 or 4 inches long, those of the flowering 

 stems few and smaller : scales of the somewhat hemispherical involucre closely 

 imbricated in about 3 series, linear-oblong, obtuse, appressed, with herbaceous tips ; 

 the outer successively shorter : rays 20 to 24, oblong : disk-flowers numerous : 

 akenes linear-oblong, glabrous : pappus of tawny slender bristles, rather deciduous. 



Proc. Am. Acad. vii. 354. 



Sierra Nevada, at Soda Springs, Tuolumne River, at 7,000 to 9,000 feet, Bolander. Heads 

 half an inch long, exclusive of the ray. 



5. A. panic ulatus, Gray, 1. c. Herbaceous, glabrous : stems nearly simple 

 from a thickish rootstock, rigid and mostly virgate, a span to a foot or more in height : 

 leaves thick and coriaceous, lanceolate, acute ; the radical ones elongated, sometimes 

 spinulose-serrate ; the cauline small, closely sessile, entire, ciliolate : heads rather 

 numerous, single or 2 or 3 together in the axils of bract-like leaves, forming a loose 

 virgate spike or raceme, or sometimes pedunculate and panicled : scales of the 



