394 



C(jM1'U.S1T.E. Acluitltu. 



ceuud, with 5 emit ahorl (often glaiidular-hcanlcd) Uiclh. Style-branches of the 



perfect Uowers with (lilatttd-tniueate iiiiiuitely poiiicillate tip. Akenessliovt, tmhinatc, 



ailUy-liiisuto. I'appiis nl' A to 12 hyaline 1 -nerved or iioiveleHH chully Hcah'.s ; tlit! 



nerve when con«|tic,iioiis .sonietiiiu^i |)ri)jecting into an awu. — (Jhietly perenniid.s 



(of VV. IMorth America), low or acauleacent, disi)0Hed to he woolly at base of the 



stem; the leaves alternate, pinnately [)arted or entire, nsiially resinons-inijjressed- 



puuctate : heads peduneled, terminating the stem, scape, or branches, sometimes 



loosely corymbose : flowers yellow. 



The acaulesceut species iiiliubit tlie Rocky Mountains and the plains eastward. Those in and 

 near Cahfornia have leafy and branching rigid stems, in tut'ts IVoni persistent somewhat woody 

 rootstocks. 



1. A. Richardsonii, Nutt. A span to a foot and a half high, varying from 

 hoary with sliort wocdiiiu-.-sa to nearly glabrou.s, leafy to the to]) : leaves rigiil, ]tidi- 

 olecl, 3-7-parte(l into linear or ahno.st liliform divisions, or some of them eMtii(! : 

 lieiids mostly inimenKis and corymbose : .scales of the involucre oblong-ovate, the 

 outer series united at base : receptacle conical, glabrous or minutely })ubescent ^vhen 

 young : scales of the pappns f) to 7, ovate-lanceolate, subulate-acuminate, either 

 slightly or considca-ably shorter than the disk-corollas, mid-nerve hardly any. — 

 Pia-admia Richnnlwnii, Hook. VI i. :U7, t. lOH. 



Var. oanescens, l>. C-. ludon. A hoary form, barely u Hpun liigii, with fewer 

 and larger heads, and shorter ovate antl merely acute scales of the pappus. — Mot. 

 King Exp. 175. 



Collected on the northern borders of the State in the Wilkes Expedition : common in the 

 interior of Oregon and in Nevada, extending to and beyond the Rocky Jlonntains. Sierra Valley, 

 Lcinmcm. The latter a form with large lieads (about 5 lines high), in this respect, and somewhat 

 in the p.ippus, approaching the remarkable var. canescciis, which was found only on one of the 

 Eastern Humboldt Mountains. 



2. A. Cooperi, Gray. Two feet high, with loose and more simple virgate 

 branches terminated by single heads, ininutely pubendent : lower leaves unknown ; 

 upper ones 3-parted into narrow linear divisions : recei)tacle convex, densely villous: 

 rays elongated, acutely 3-cleft at the summit : scales of the pai>i)ns 5, broadly ovate 

 and obtu.se or slightly j)ointed, travensed by an obscure niidnerve, not half the 

 length of the disk-corollas. — J'roc. Am. Acad. vii. 359. 



Southeastern border of the State, on Providence Mountains, at the altitude of 5,U00 feet, 1»: 

 Cooper. Head as large as in the variety of the preceding ; the rays longer. 



81. SYNTRICHOPAPPUS, Gray. 



Head many-flowered, with 5 pistiljate rays; all the flowei-s fertile. Involucre 

 cylindraceous, of 5 equal and oblong carinate-concave scales, which partly enclose the 

 ray-akenes. Eeceptacle Hat, naked. Hays oval, obtusely 2 - 3-toothed at the apex : 

 disk-corollas nearly funnelform, glabrous and naked, 5-lobed ; the lobes ovate- 

 oblong. Anthers tipped with a long lanceolate appendage. Style-branches linear, 

 surmounted by an ovate-lanceolate Hat appendage. Akenes linear-turbinate, with 

 5 strong and obtuse hirsuto-villous ribs, truncate at summit, the terminal areola 

 large. Pappus of numerous barbellate white bristles in a single series, shorter than 

 the disk-corolla, united at base in a ring (and some of them higher up), and decidu- 

 ous together. — A low diffuse white-woolly aniuial, with alternate 3-lobed leaves, 

 and wholly the aspect of Actinolepis, to which it is clearly related. — Gray in Pacif. 

 R. Rep. iv. 106, t. 15. 



