Psathyrotes. COMPOSIT.E, 377 



involucre 4 linjs high, nearly equalling the light rellow coroUas. — Gray, Proc. Am. Atrul. 

 ix. 206, & Bot. Calif, i. 409. — Cascade Muuiitains,"on the border of Brit. Columbia, Li/all. 

 Yakima Co., Washington Terr., Brmidtii,!-. 



Var. Californica, Gkay, 1. e. More den.sely woolly, and upper face of the lea\es 

 tardily glabrate : coroUa^lobes shorter.— W. California, on Chimney Kock, ilendocino Co. 

 (and, according to the ticket, behind Santa Cruz), Kellogg. 



183. PEUCEPHt'LLUM, (ira^-. (nciV,?. the Fir, ^-iXXov, leaf, from 

 some likenes.s in foliage.) —Bot. Mex. Bound. 74; Benth. & Hook. Gen. ii. 4o8. 

 Psathyrotes § Peaci-plnjllum, Gray, Proc. Am. Acud. ix. 2<J6. — Sin^de species. 



P. Schottii, Gkay, 1. c. Shrub 2 to 10 feet high, glaljrous but resinous-viscid and balsamic, 

 very much branched, rigid (the stem at base often .'i inches in diameter, including the rough 

 bark) ; branches and branchlets very leafy up to the terminal heads : leaves alternate and 

 some fascicled in the axils, nearly terete, half-inch to inch long, as it were aceru.se but blunt- 

 ish and not very rigid, minutely impressed-punctate ; the lo\\er sometimes 3-parted ; heads 

 barely half-inch high : corollas duU yellowish, with the teeth becoming fuscous . anthers iu- 

 eladed or half-exserted. — P.M/'Ay/t//' s Srlmitil, Gray, Proc. Am. Acad. ix. 206, & Bot. Calif. 

 i. 409. — Desert region of S. E. California and adjacent Arizona; first coll. by Srhotl and 

 dewberry ; later by Parrg, Lf-inmon, Pringle, &c. 



184. PSATHYROTES, Gray. (^advpSTr,^, brittloness, from the brittle 

 stems and branches.) — Low and pubescent or scurfy winter annuals (of Nevada 

 and Arizona) ; with round-cordate or ovate petioled leaves, and rather small heads 

 of yellowish flowers, sometimes turning purplish. — PI. AVrinht. ii. 100; Proc. 

 Am. Acad. vii. 3G0 ; also Proc. Am. Acad. ix. 206, & Bot. Calif, i. 409, excl. 

 § 2. Tetradyraia § Polydymia. Torr. in Emory Eep. 1848, 145. Bulbostylis 

 (Psathyrotiis), Xutt. PL Gamb. in Jour. Acad. Philad. n. ser. i. 179. 



§ 1. Divaricateh' much branched, spreading or depressed, leafy; with solitary 

 heads in the forks, either erect or nodding on short or slender peduncles : corollas 

 more or less woolh" at summit : st} le-branches glabrous, or with some very minute 

 pubescence at or toward the tip. 



P. ramosissima, Gkat. Lanate, at least the stems and branches, aud the young leave.-; 

 covered with dense and somewhat scurfy white tomentum : leaves long-petioled, roundish, 

 subcordate or almost cuneate at base, coarsely crenate (haK-inch wide) : outer bracts of the 

 involucre 5, spatulate-obovate, much larger than the inner, the upper ]inrt spreading and 

 foliaceous : corollas plainly yellow : akenes short-turbinate, densely long-\ illous. — Proc. Ajn. 

 Acad. vii. 363, & Bot. Calif." 1, c. P. annua, Gray, PI. Thurb. 223, & Bot. Mex. Bound. 102, 

 in part. Tetradijmia (PoJgdymia) rammiissi'iiiri, Tott. in Emory Rep. I.e. — Gravelly hills 

 and rocks, along the Jlohave and Gila, S. E. California and throughout adjacent Arizona; 

 first coll. by E/iiurg. 



P. annua Gray. Furfuraceous-canescent or cinereous ; leaves more dentate, sehlom cor- 

 date, commonly wider than long : outer bracts of the involucre ovate-oblong or narrower, 

 less foliaceous, rather shorter than the inner, erect : corollas more slender, pale yellow, 

 changing sometimes to purplish : akenes oblong-turbinate, densely villous : papjais rathej 

 less copious. — PI. Wright, ii. 100, Proc. Am. Acad. vii. 3C4, & Bot. Calif. 1. c. L'"//«/s/;//,\- 

 (Psathi/rotus) annua, Xutt. 1. c. — Saline plains, Nevada, eastern borders of California, 

 S. Utah, and adjacent Arizona; first coll. by Gumhtl. 



P. pilifera Gray. Minutelv furfuraceous-tomentose : leaves dilated rhombic-obovate or 

 roundish with cuneate base, entire ; their margin and sometimes upper face and long petiole 

 beset with very long and soft (probably vi.scid) many-jointed hairs: heads narrower: outer 

 bracts of cvlindraceous involucre oblong-linear, herbaceous only at summit: young akcr.cs 

 oblong, short-hirsute : style-branches dorsally .somewhat pubescent for some di-tarjce below 

 the truncate tip. — Proc. Am. Acad. xix. 50. — Southern Utah, near Kanab, Mrs. Thompson, 

 Parry. 



