o(\o COMPOSURE. Leasiiiijiu. 



§ 2. Limb of the corolla rei/ularli/ 5-parted : brunches of the style tij>pcd ivith a 

 conspicuous slender subulate and less hisj/id <(/)j.ic/ida</e. 



4. L. vil'gata, (!iay, 1. »!. Kn^ct, 1 ui- 2 Ibct liiyli, with virgatts branches, 

 (leiisc'ly nuccusu-WDdll.v, hecomin^ iiaUe.l with ago, but not ghuulular : cauliiit^ leaves 

 purtly elaspiny, entire, oblong, or the lowest simtulato ; thoao of the bianehes very 

 short, appressed, concave, carinately one-nerved, somewhat sagittate, about the 

 length of the 5- 7-liowered heads, which are solitary and sessile iu their axils, so as 

 to form a narrow interrupted bracteate spilce : involucre cylindraceous, of rather few 

 and blunt a[)pressed scales : pai)pus much shorter than the tube of the (probably 

 pale })urplo) corolla. 



Noilhuin piu t of Culilbiiua, Dr. rickeriiuj, Fruf. Ncwlnrnj. Heads about 4 linos long. 



5. L. leptoclada, CJray. Finely white-woolly : the erect slender stem and lili- 

 forni brandies soon glabrous : lower cauline leaves spatulate and sparingly toothed ; 

 the upper lanceolate or linear and entire, closely sessile by a sagittate adnate base ; 

 the uppermost diminished into remote subulate bracts : heads terminating the very 

 slender and mostly naked paniculate branches, 5 - 20-llowered : involucre turbinatt;, 

 especially when many-tlowered ; its scales many-ranked and the outer successively 

 shorter, all appressed and with acute greenish tips : corollas purple or sometimes 

 white, the jiappus etiualling their tube. — Troc. Am. Acad. vii. 351. 



GravuUy or Himdy mdH, near Sun Fnmci.sco (Or^Blul Springs, fcc), nml Ihrougliout tho I'oot-iiiils 

 anil monntiiins in Maiiiiosa Co., Ilowcriiig July uud August. Varies iVoin :} or 4 indios to a foot or 

 two in height, and oxeeeilingly iu tin; number of flowers in the head, from 18 or 20 in the var. 

 TYPICA, Gray, 1. c., to only live in the var. MiciiOCEPUALA, in whieh the inflorescence is most 

 depaui)erate, while the var. tenuis is a reduced form, only 3 to 8 inches high. All are evidently 

 states of one species, — to which seemingly belongs a very branehed small form collected by Dr. 

 Horn iu Owens Valley. 



14. HETEROTHECA, Cass. 



Head many-flowered, lieteroganrous ; the rays numerous and fertile. Involucre 

 hemispherical, of numerous narrow imbricated scales, lieceptaclo nearly Hat, alve- 

 olate. Ligules narrow. Branches of tho style tipped with a hispid appendage. 

 Akenes compressed ; those of the ray triangular, very obtuse at summit, thickened 

 and destitute of pappus ; those of the disk thinner and flatter, silky-pubescent, Avith 

 a copious pappus of rusty or reddish capillary bristles nearly equalling the disk- 

 corollas, and an outer set of very short chaffy bristles. — Perennial or biennial hir- 

 sute or scabrous herbs, with alternate and mostly dentate leaves, and middle sized 

 heads of yellow llowers terminating tho branches. 



1. H. grandiflora, Nutt. A span to a foot high : the leaves as well as the 

 stem hirsute with long and rather soft spreading hairs ; lower ones o\a\, sparingly 

 toothed, contracted into a slender petiole ; upper ones small and narrow : heads 

 mostly solitary : involucre glandular but not hairy : appendages of the style short 

 and obtuse : sliort outer pap|ius copious. 



Near the coast, on sandy plains, from Monterey to San Diego. Heads not so largisas those of 

 tho Mexican //. inuloidcs. Akenes of the ray when young minutely pubescent, but becoming 

 glabrous. 



2. H. floribunda, Benth. Stem 2 feet or more in height, very leafy to the 

 top, hispid, also minutely glandular : leaves mostly with a line and appressed pubes- 

 cence ; the lower ones ovate and Avith petiole auricled at base ; upfier oblong and 

 closely sessile : heads numerous, corymbed or panicled, snudl : involucre glandular : 

 appendages of the style acute : short outer i)appus cojiious. — Bot. Voy. Sulph. 24. 



Near the coast, from San Pedro southward, Uiiids, Coulter, Puny. Heads less than half au 

 inch long : rays small. 



