342 COMPOSITE. Chcenactis. 



rocky banks of the Sacramento, below Mount Shasta, Lemmon (perliaps a mistake as to 

 habitat) ; S. E. California, south of San Jacinto Mountains, Parish. 



§ 2, AcARPii^A. Pappus of deciduous and fimbriate paleae, or wanting: 

 akenes obovate- or linear-clavate, hardly angled, blackish : involucre viscid : 

 corollas whitish or ochroleucous, all alike or nearly so, the marginal not obviously 

 ampliate: annuals. — AcarphcBa, Gray, PI. Fendl. 98; characterized anew in 

 Proc. Am. Acad. xix. 30. 



C. artemisisefolia, Gkay. A foot or two higli, paniculateh' branched, furfuraceous- 

 pubescent, soniewiiat viscid, above glandular-hirsute, especially the naked summit and 

 peduncles and involucre of the loosely cymose-paniculate heads : leaves 2-3-pinnatcly divided 

 or parted into short linear or oblong lobes : involucre broadly campanulate, half-inch high, 

 manv-flowered ; its bracts lanceolate-linear, acute : akenes linear-clavate, flattened, hardly at 

 all angled, the sides minutely impressed-striate ; epigyuous disk small and obscurely annu- 

 late. — Proc. Am. Acad. x. 74, & Bot. Calif. 1. c. Acurphaa arifunismfolia. Gray, PI. Fendl. 

 98, & Bot. Mex. Bound. 95, t. 32. — San Diego Co., California ; first coll. by Coulter. 



C. thysanocarpha, (iRay. Slender and low annual, paniculately branched, viscid-puber- 

 ulent, with some early deciduous villosity, sparsely leafy up to the subsessile small heads : 

 leaves narrowly linear, entire : involucre barely 3 lines high, of few linear-oblong aud vis- 

 cidulous bracts, 7-10-flowered : akenes clavate-obovate, obscurely angled : pappus about half 

 the length of the corolla, of 8 or 9 nearly equal thin spatulate palere which are erosely fim- 

 briate (juite down to their unguiculate base, deciduous. — I'l'oc. Am. Acad. xix. 30. — Sierra 

 Nevada in Kern Co. ? California, at 9,800 feet, Ruthrork, no. 345. Apparently depauperate 

 or unseasonable specimens of a peculiar plant ; coll. Sept. 



154. HtTLSEA, Torr. «fe Gray. (The late Dr. G. W. HuJse, U. S. Army.) 

 — Herbs, of the Sierra Nevada and its continuations, viscid-pubescent and bal- 

 samic-scented, most of the species when young floccose-woolly ; with alternate 

 mostly sessile entire or dentate pr pinuatifid leaves, and solitary or scattered large 

 heads of yellow flowers, or rays sometimes purple ; in summer. — Bot. Mex. 

 Bound. 98; Pacif. R. Rep. vi. 77, t. 13; Bot. Calif, i. 385. 



* More or less floccose-woolly when youiiif, and denudate in age: upper leaves reduced in size and 

 bract-like on the naked flowering branches or peduncles : root perennial, or in tlie lirst species per- 

 haps biennial. 



H. Californica, Torr. & Gray, 1. c. Kobust, 2 feet or more high, leafy, bearing several 

 paniculately disposed heads, when young whitened by long and soft loose wool : leaves 

 entire or nearly so; lower spatulate or Ungulate, uppermost ovate-lanceolate to linear : invo- 

 lucre two-thirds inch high and broad ; its bracts very numerous, linear, gradually acute, 

 villose-lanate : rays very many, with linear ligule half-inch long : palea; of the pappus quad- 

 rate-oblong and somewhat equal, or the two over the principal angles longer, erose-deuticulate 

 at summit. — Gray, Bot. Calif, i. 38G. — S. California, in raomitaius of San Diego Co., Parrij, 

 and (near Campo, June, 1880), Parish, G. R. Vasey. 



H. vestita, Gray. Commonly a foot or less high from a rosette of pannosely white-tomen- 

 tose spatulate leaves (either entire or lyrately dentate, tardily somewhat denudate) ; the 

 flowering stems sometimes scapiform and monocephalous, commonlv sparsely leaved below 

 and bearing two or three slender pedunculate heads : involucre half-inch high, of mostly 

 broadly lanceolate viscid-pubescent bracts : rays little surpassing the disk-flowers, sometimes 

 shorter, or even wanting, yellow or changing to reddish : pappus of conspicuous and silvery 

 quadrate erose-toothed palea;, either nearly equal or two rather longer. — Proc. Am. Acad. 

 vi. 547, & Bot. Calif, i. 387. (Forms have been distributed under the names of //. Purri/i, 

 Gray, and H. cuUicarpha, S. Watson.) — S. E. California; volcanic hill south of ilono Lake, 

 Brewer, low, scapiform, with large head. San Jacinto Mountain, San Diego Co., 1882, 

 Parish. Mohave country, San Bernardino Co., Parr)/, 1876, form with dentate or almost 

 pinnatifid leaves. Also a more leafy aud branched form, 2 feet high, with more deciduous 

 wool and rather longer rays. Parish. 



