r„l<,foTin. COMPOSTT/K 337 



involucro oblong-livnccolato, in 2 sftiio.s : rays 20 or 30, yolldw : scales of tlic jmj)- 

 pus liinliriato-laccmto. — Pucif. 1'. IJcp. vi. TH, t. 12. 



Var. Larseni, with tufted steins leafy almost to the head. 



Crater Pass, Oregon, lat. 44°, Newberry. The variety on Lassen's Peak, Bolander and 

 Larsen. 



6. H. vestita, Gray. Wliite-wooUy when young ; the scapes soon naked and 

 glandidar : leave.s obovato or s])atulatc, tapering into a short petiole, entire or nearly 

 so : scales of the involucre linear or lanceolate, in 2 or 3 series : rays 20 to 30, yel- 

 low : scales of the very silvery and conspicuous jjappus erose-toothed, the two 

 longer ones oblong and equalling the proper tube of the corolla, the alternate ones 

 shorter as well as broader and truncate. — Proc. Am. Acad. vi. 547. 



On a volcanic hill south of Mono Lake, at the height of 9,000 feet, Brewer. Leaves an inch or 

 so long, very white with the floccose wool, which may be deciduous. Head an inch high at 

 maturity. JJays barely 3 lines long. 



75. BIGIOPAPPUS, Gray. 



Head rather many-llowcred, with 5 to 12 pistillate rays; all the flowers fertile. 

 Involucro a single or somewhat double series of rather rigid herbaceous subulate- 

 linear erect scales, similar to the uppermost leaves, at length coucavo and half 

 embracing akenes. Receptacle flat and naked. Rays not exceeding the disk, the 

 oblong entire or 2-toothed ligule not longer than its tube : disk-corollas slender and 

 with 3 to 5 short erect teeth. Style-branches of the disk-flowers with short and flat 

 linear atiginatic portion, tipped with a longer slendor-subulato hispid appendage. 

 Akenes linear, slender, compressed, minutely rugose, sparsely hirsute, those of the 

 disk more or less 4-angled. Pappus of \ or 5 rigid ami wholly opacpio subulate 

 awn-shaped scales, as long as or surpassing the corollas, or in the ray one or two 

 nmch shorter. — A single species. 



1. R. leptocladus, Gray. Slender annual, a span to a foot high or more, mi- 

 nutely hairy and roiighish, with narrow linear altiirnate entire leaves, and corymbose 

 or panicuktf. filiform branches, inclined to bo long and naked, terminateil by small 

 heads of inconspicuous (leshcolorcd or i)ur])lish flowers. — Pro(!. Am. Acad. vi. 548 ; 

 iJcnth. & Hook. Gen. PI. ii. 40G. 



Dry ground in the foot-hills, both of the Coast Range (Napa Co., kc.) and of the Sierra Nevada ; 

 extending into Oregon (where it was first collected by Dr. Lyall) and Nevada. 



76. PALAFOXIA, Lnga.sca. 



Head 10- 30-flowered ; the flowers all perfect and tubular (but the marginal 

 Romotimos with enlarged and irregular ray-liko corollixs, and in one eastern species 

 with pistillate 3-cloft rays). Involucre canipanulate or turbinate ; the scales mom- 

 branaceoiis or herbaceous, in (»no or two series. HivepUich' llat ami nakcMl. Corolla 

 various ; the lobes usually long and narrow. Style-branches fdiform,' minutely 

 glandular-hirsute. Akenes 4 - 5-angled, linear or elongatrd-obpyramidal. Pappus 

 of 4 to 12 hyaline chafl"y scales traversed by a strong midrib, commonly shorter 

 and blunter in the outermost flowdrs (rarely nearly wanting). — Herbs, or some- 

 times shrubby, roughisb-iiubcscent or scabrous, and mostly glandnlnr above ; with 

 narrow alternate and entire 1 - 3-nerved leaves, and small or middlc-sizod solitary or 

 loosely corymbose heads of rose-colored or flesh-colored flowers. 



A small genus confined to the southern borders of the United Stntos nnd to Mcxi.o, polymor- 

 phous as to the corollas, which in all the eastern North-American s|K?cies have n cnrnpanulate 



