58 University of California Publications in Botany. (T OL - 3 



Plant woody at base, with rigid fastigiate very leafy branches 

 and small heads in terminal cymes or panicles : herbage glabrous 

 but resinous-punctate, becoming balsamic-viscid: leaves thick, 

 terete, deep green, .7 to 2 cm. long: involucre narrow, 6 mm. 

 high : bracts obtuse, carinate, the outer successively shorter and 

 bearing near the apex a distinct green or brownish glandular 

 thickening: achenes linear, silky-pubescent. 



Arid plains and hills of the Desert Area, east into Nevada 

 and Arizona: mountains around Tejon Valley, Heermann, ace. 

 to Gray; Antelope Valley, Pringle, ace. to Parish; Inyo Co., 

 Austin, no. 414, also Purpus, no. 3060; Whitewater and Palm 

 Springs, Colorado Desert, ace. to Parish; Cuyamaca Mts., Palmer, 

 ace. to Gray; east to Arizona (?) and Nevada. Aug.-Oct. 



2. C. paniculatus (Gray) Hall, comb. nov. Bigelovia panic- 

 ulata Gray, Proc. Am. Acad. viii. 644 (1873). Chrysoma panic- 

 ulata Greene, Eryth. iii. 12 (1895). 



Much like no. 1 but more slender in all its parts and the 

 foliage and involucres paler : plant 2 m. or less high : inflorescence 

 a profusely branched panicle : involucral bracts straw-color, thin, 

 obtuse, destitute of the subapical glandular spot, the inner ones 

 6 or 7 mm. long. 



Lower Sonoran Zone, on both the Colorado and Mohave des- 

 erts, east into Arizona : near Cabazon, Scliellenger, no. 43, also 

 Parish, no. 655 ; Chuckawalla Bench, Schellenger, no. 19 ; near 

 Bagdad, Brandegee. On gravelly plains between Cabazon and 

 Whitewater it grows to a height of 2 m. or more (6 to 8 ft.) 

 ace. to Parish. Oct. -Nov. 



3. C. viscidiflorus (Hook.) Nutt, Trans. Am. Philos. Soc. ser. 

 2, vii. 323 (1841). Crinitaria viscidiflora Hook., Fl. Bor. Am. ii. 

 24 (1834). Bigelovia Douglasii Gray, Proc. Am. Acad. vii. 645 

 (1873). 



Branching shrub, 1 dm. to 2 m. or more high: stems with a 

 grayish fibrous bark, the twigs smooth and commonly white: 

 herbage destitute of all tomentum, smooth and glabrous or mere- 

 ly scabrid: leaves narrow, acute, mostly 3-nerved: inflorescence 

 cymose: involucre 5 to 8 mm. high; bracts only 3 or 4 in each 

 vertical rank (these ranks therefore indistinct), oblong or lanceol- 



