202 University of California Publications in^ Botany. [VOL. 3 



3. H. heterochroma Gray, Proc. Am. Acad. vii. 359 (1868). 



Robust, 5 to 15 dm. high, from an annual root : herbage very 

 viscid, exhaling a rank disagreeable odor : leaves oblong, strongly 

 dentate, the largest sometimes 15 cm. long : heads racemosely dis- 

 posed on the simple ascending branches: involucral bracts lan- 

 ceolate, attenuate, about 15 mm. long: rays 50 to 60, narrowly 

 linear, purple, usually conspicuous but said to be sometimes in- 

 conspicuous or obsolete: disk-corollas yellow; tube hirsute: 

 pappus-paleae unequal, lacerate. 



At middle altitudes on the San Jacinto and San Bernardino 

 Mts., north to the Yosemite ; also in the Coast Ranges of Monterey 

 Co., ace. to Brandegee ; 49 rarely collected. 



75. TRICHOPTILIUM Gray. 



Low and spreading floccose-woolly desert annual with alter- 

 nate (or the lower opposite) leaves. Heads yellow, discoid, scat- 

 tered on slender ascending peduncles. Involucre hemispheric; 

 bracts about 20, nearly equal, those of the outer series ovate- 

 lanceolate and acute, the thin inner ones narrowly spatulate and 

 often obtuse. Corolla with very short proper tube and elongated 

 throat, the short lobes pubescent externally, spreading; outer 

 corollas slightly enlarged : style-branches linear, obtuse. Achenes 

 oblong-turbinate, villous. Pappus-paleae 5, much cut into un- 

 equal slender fimbriae, the middle ones approximating the corolla. 



1. T. incisum Gray, Bot. Mex. Bound. 97 (1859). Psathy- 

 rotes incisa Gray, PL Thurb. 322 (1854). 



Plant 1 to 1.5 dm. high: leaves 1 to 5 cm. long, narrowly 

 spatulate to obovate, narrowed below to a margined petiole, more 

 or less incised-dentate with acute teeth: peduncles about 5 cm. 

 long on the larger plants, glandular-pubescent, not woolly : invo- 

 lucre 6 to 8 mm. high ; outer bracts ovate-lanceolate, acute. 



Lower Sonoran Zone, in stony soil or in cracks of rocks : Colo- 

 rado Desert (Coyote Canon, Palm Springs, Indio Mt, Chucka- 

 walla Bench, Signal Mt., etc.) to Arizona and Lower California. 

 Probably also in the southeastern part of the Mohave Desert, 

 since it comes from Ft. Mohave, Arizona. In some specimens 



49Zoe iv. 154 (1893). 



