3G8 CUMPOSIT.E. Luyia. 



59. LA.YIA, Hook. & Am. 



Head many-flowered, heteiogaiuous, Avith 8 to 20 pistillate rays and numerous 

 perfect disk-flowers, all fertile, except occasionally some of the central. Involucre 

 lieniispherical or very broadly cuiupanulato, of as many scales as ray-flowers (and 

 sometimes a few external enipty ones), flat or nearly so on the back, their abruptly 

 dilated thin or scarious margins or auricles below infolded on either side so as to 

 meet and enclose the ray-akene. Keceptacle broad and flat, or rarely convex 

 (pubescent where not chafl'y), a series of chafl' like an inner involucre subtending 

 the outermost disk-llowors, or in some species with thinner clmlf subtending uU or 

 most of them, liuys cuneiform or oblong, 2-3-lobed or toothed at the apex : disk- 

 corollas cylindraceous-funnelform, 5-lobed at summit. Akenes of tlie ray obovate- 

 oblong or narrower, obcompressed, glabrous (with one exception) and smooth, 

 destitute of pappus, but crowned with a protuberant disciform areola; of the disk 

 nearly similar or linear-cuneate, mostly hairy, and with a various pappus of 5 to 

 20 bristles, awns, or chafiy scales, either naked or plumose, or occasionally none. — 

 Annuals, all of the Califurnian region ; with leaves nearly all alternate and often 

 incised or pinnatifld, and showy heads of yellow or yellow and white flowers 

 (mostly with brown or purple anthers), terminating the somewhat paniculate or 

 corymbose branches. — Gray, PI. Fendl. 103; lienth. & Hook. Gen. PI. 2. 395, 

 where the synonymy is given. 



Rudiments of pappus occasionally occur on the ray-akenes, as a small scale, or a bristle or two, 

 but they are evidently abnormal. The species are arranged under three sections, mainly by tlie 

 pappus : otherwise several ot them are almost exactly alike. 



§ 1. Pappus of \^ to 20 {or rarely fewa-) aunts or stout bristles which are long- 

 plianose or villosc betoiv the middle : receptacle chaffy only at the marf/in, 

 rarely avioiuj some of the outer disk-jloivers : akenes all narrow and somewhat 

 clavate, crowned with a protuberant annular or rarely almost cupulate disk, 

 especially in the ray. Plants all hispid or hirsute and S]rri)ikled above with 

 dark-colored stipitate glands. — Madaroglossa, Gray. (Madaroylussa, DC.) 



* Hays white (or rarely purple), cuneiform and 3-lobed ; the disk yelloiv. 



1. L. glandulosa, Hook. & Arn. A span to a foot high, loosely branching, 

 roughish with short hiypid hairs : leaves linear, the upper ones all small and entire, 

 the lower often lanceolate and sparingly incisely i)inuatilid : heads middle-sized or 

 smaller: rays 8 to 13, conspiciiously exserted : disk-akenos appressed silkyvillous : 

 pappvis mostly bright white, the very copious villous woul much shorter thuii the 

 stout bristles, thu inner portion at length crisped and interlaced. — Blepharipappus 

 glaiidulosus, Hook. Eriopappus glandulosus, Arn. Madaroglossa angusiifotia, DC 



Var. rosea, Gray. Pays rose-purple ; otherwise api)arently identical with the 

 ordinary form. 



Dry and open grounds and bare plains, from the Dalles of Oregon through the eastern poitions 

 of the Sierra Nevada to bos Angoles Co., and eastward to New Mexico and Utah. The Var. 

 rusca, at Ojai, Ventuia Co., S. F. J'eckhaiu : apparently ditl'ering only in tliu color of the rays, 

 which in the species are white. Heads variable in size : rays fiom a third to half an inch in 

 length. L. Neo-Mcxicana, Gray, PL Wriglit., is the same, with the occasional development of a 

 crown of chaffy pappus on tlie ray-akenes. 



2. L. heterotricha, Hook. Sc Arn. A foot or two high, erect, rough-hispid 

 and somewiuit viscid : leaves linear or lunceohile, from entire to laciniate-|)innatili(l : 

 heads pretty large : rays 10 to 18, fully twice the length of the disk, oblong-cunei- 

 furm, bright wliite : disk-akenes villous-pubescent : pappus white or whitish ; the 



