176 BOTANY, 



—New Mexico (Parry ;) Colorado, (272 Hall & Harbour; 286 Vasey,) and 

 California, (1902 Brewer; 6157 Bolander.) On a high divide in the East 

 Humboldt Mountains, and in Bear Kiver Canon, Uintas ; 8,000 feet altitude; 

 July, August. The Nevada plant has smaller leaves and more numerous 

 heads with paler rays than the specimens from Utah and Colorado. ■ (620.) 



EiGiOPAPPUS ^ LEPTOCLADUS, Gray. Proc. Amer. Acad., 6. 548. Plant 

 5-10' high ; a single head terminates the stem, and just below this there 

 rise several simple branches, with heads considerably overtopping the first 

 one ; leaves 3-12" long, k-¥' wide ; heads broadly obconic, about 4" long 

 and as many broad at the top. — Oregon, (Dr. Lyall ;) Russian River Valley, 

 California, (4678 Bolander ;) Carson City, (Anderson.) Foothills of the 

 Pah-Ute and Havallah Ranges, Nevada; 5,500 feet elevation ; June. (621.) 



Blephakipappus^ scabee, Hook. Stem 6-8' high ; leaves 3-4' long, 

 J" wide. — The ray-flowers are sometimes furnished with abortive or rudimen- 

 tary stamens, as in several other genera. Oregon, east of Walla- Walla ; 

 Carson City, Nevada, (71 Anderson !) 



Layia^ glandulosa, H. & A. Erect, usually branched from the base 



'EIGIOPAPPUS, Gray, I. c. "Heads many-flowered, radiate; rays 5-8, pistillate, fertile, the 

 ligule small and slightly longer than the disk; disk-flowers perfect, the corolla narrowly tubular, 3-4- 

 toothed, the teeth Tery short. Involucre in two series, shorter than the florets, of subulate-linear rigid 

 scales resembling the leaves of the branchlets. Eeceptacle flat, naked. Branches of the style in the 

 perfect flowers with the stigmatic portion short, smooth and flattened, and produced into a slender subu- 

 late somewhat hispid appendage. Achenia slender, linear, compressed, hispidulouS, wrinkled transversely. 

 Pappus simple, of 4-5 rigid somewhat horny narrowly subvilate awn-like scales, longer than the corolla, 

 but shorter than the acheuium. — An annual slender puberulent herb, with alternate linear leaves ; 

 flowering branches few, filiform, rising from the top of a simple stem, leafless below, and bearing single 

 heads ; flowers yellowish or white." 



2BLEPHAEIPAPPUS, Hook. Heads, few-flowered, radiate; rays about 3, pistillate, the ligules 

 broadly wedged-shaped, 3-5-lobed nearly to the short glandular tube ; disk-flowers 7-9, perfect, only 

 the outer ones fertile, proper tube of the coroUa short, the throat funnel-shaped, and the border 5-toothed. 

 Involucre of 6-8 elliptical-oblong, subequal scales, membranous on the involute margin and glandular on 

 the back, concave. Eeceptacle small, bearing a few very delicate scales partly embracing the fertile 

 disk-achenia. Style of the disk-flowers hairy, the glabrous obtuse branches extremely short, stigmatic 

 to the summit. Achenia villous, oblong-obcouic. Pappus of 12-20 narrow hyaline pectinately ciliate 

 scales, much shorter than the corolla.— A slender annual, nearly smooth below, the corymbose branchlets 

 glandular-viscid, the leaves narrowly linear, obtuse, entire, scabrous, and the heads of white flowers 

 about 4" long and nearly as broad. \ 



" LAYIA, Hook. & Aen. Gray. PI. Fendl., 103. Heads many-flowered, radiate ; rays 10-15, pistil- 

 late, fertile ; the ligule dilated-ouneate, 2-3-toothed ; disk-flowers tubular, perfect, the corolla with a 

 short proper tube, funnel-shaped above and 5-toothed. Involucre in a single series, or with a few outer 

 foliaceous bracts ; the scales oblong-linear, more or less hispid, foliaceous above, the base with membrane- 

 ous margms, Involute and enclosing the ray-achenia. Eeceptacle flat, chaffy throughout or near the 

 margm only. Branches of the style in the disk-flowers filiform-subulate, hairy above, at length exserted 

 and recurved. Achenia of the ray glabrous, oblong or obovate, obcompressed, (i. e , parallel to the invol- 

 ucral scales,) with a very small epigynous disk but no pappus. Achenia of the disk similar or nar- 

 rower and sub-olavate, and viUous-pubescent ; pappus sometimes wanting, but usually present and con- 

 sisting ot several ovate-lauceolate scales or setiform awns, villous or lanate near the base with long soft 



