74 NORTH AMERICAN FI.ORA [Volume 34 



white, all alike; anthers slightly protruding; achenes 6 mm. long, densely hirsute; squamellae 

 about 8, linear, obtuse, about 5 mm. long. 



Type locality: [Sierra Nevada]. 

 Distribution: Sierra Nevada, California. 



34. Chaenactis Evermannii Greene, Leaflets 2: 224. 1912. 



A subscapose perennial with long cespitose creeping rootstocks; leaves 1-2 cm. long, 

 spatulate, 3-5-toothed or -lobed above the middle, loosely floccose or in age glabrate; peduncles 

 1-3 cm. long, floccose; involucre turbinate, 6-8 mm. high and as broad, puberulent; bracts 

 linear-spatulate, rounded at the apex, rather few and unequal; corollas flesh-colored or white, 

 5 mm. long; achenes 5 mm. long, hirsutulous; squamellae 8, unequal, oblong, obtuse, the 

 longer 4-5 mm. long. 



Type locality: Near Sawtooth, Idaho. 

 Distribution: Known only from the type locality. 



35. Chaenactis Parishii A. Gray, Proc. Am. Acad. 20: 299. 1885. 



Chaenactis suffrutescens A. Gray, Syn. Fl. N. Am. V: 341, in part.- 1884. 



A sufFruticose perennial; stem 3-4 dm. high, light-green, sparingly floccose when young; 

 leaves 3-5 cm. long, pinnate with short linear divisions; stem-leaves gradually reduced up- 

 wards, the uppermost small and bractlike; heads 1-5 on erect peduncles 5-10 cm. long; 

 involucre 12-13 mm. high, 15-20 mm. broad; bracts narrowly linear, acute, slightly floccose; 

 corollas about 7 mm. long, puberulent, apparently ochroleucous ; achenes 7 mm. long; 

 squamellae 13-15, narrowly linear. 



Type locality: Southern border of California. 



Distribution: Southern California and northern Lower California. 



36. Chaenactis suffrutescens A. Gray, Proc. Am. Acad. 16: 100. 



1880. 



A suffruticose perennial; stem 3-4 dm. high from a decumbent woody base, white-floc 

 cose; leaves 5-10 cm. long, white-floccose, pinnatifid or sometimes bipinnatifid into linear 

 divisions; peduncles 1-2 dm. long, glandular-puberulent; involucre 18-20 mm. high and 

 about as broad; bracts linear, attenuate, glandular-puberulent; corollas whitish, 7 mm. long, 

 all alike, puberulent; achenes 6 mm. long, densely hirsute; squamellae 8-12, linear, 5 mm. long 



Type locality: Rocky banks of the Sacramento below Mt. Shasta. 

 Distribution: Valleys of northern California. 



47. OROCHAENACTIS Coville, Contr. U. S. Nat. Herb. 4: 134. 



1893. 



Annual herbs, branched from the base. Leaves linear, entire, alternate or the lower 

 opposite. Heads discoid, sessile at the ends of the branches or in the upper axils. Involucre 

 campanulate; bracts about 4. equal, slightly concave, distinct. Ray-flowers none. Disk- 

 flowers few, hermaphrodite, fertile, greenish-yellow, glandular-granuliferous; tube very short; 

 throat trumpet-shaped. Anthers sagittate. Style-branches linear, without appendages, 

 obtuse, short-hispidulous. Achenes terete, striate, linear, slightly clavate. Pappus of several 

 obtuse membranous erose squamellae, united at the base and falling off together. 



Type species, Chaenactis thysanocarpha A. Gray. 



1 . Orochaenactis thysanocarpha (A. Gray) Coville, Contr. U. S. Nat. 

 Herb. 4: 134. 1893. 



Chaenactis thysanocarpha A. Gray, Proc. Am. Acad. IQ: 30. 1883. 

 Bahia Palmeri S. Wats. Proc. Am. Acad. 24: 83. 1889. 



A low and slender annual; stem 5-15 cm. high, minutely puberulent; leaves narrowly 

 linear, 1-3 cm. long, the lower opposite, the upper alternate; heads sessile in the axils; in- 

 volucre campanulate, 5-7 mm. high; bracts oblanceolate, ac.tish. glandular-puberulent; 



