200 COMPOSITE FAMILY 



30. CHAENACTIS. 

 Our species have alternate lobed leaves and erect heads 

 without rays, the bracts erect and equal. Pappus of thin 

 white scales. 



1. C. glabriuscula DC. Annual, 1 or 2 ft. high, at first 

 woolly but soon smooth and green. Heads fully y 2 in. high, 

 solitary on the long naked peduncles. Flowers yellow, the 

 outer ones enlarged. Pappus-scales acute. — Foothills up to 

 4000 ft. (Yosemite Valley). 



2. C. douglasii H. & A. Annual or biennial, 1 or 2 ft. high, 

 rather permanently white-woolly. Leaves with numerous 

 small lobes. Heads many, short-peduncled. Flowers flesh- 

 color, the outer corollas not enlarged. Pappus-scales obtuse. 

 — Dry forests almost throughout the mountains. 



3. C. nevadensis Gray. Prostrate, woolly, 6 in. or less 

 high. Heads few, solitary. Flowers flesh-color. Pappus- 

 scales obtuse. — Mono Pass, Pyramid Peak, etc. 



31. HULSEA. 



Biennial and perennial herbs with alternate sessile leaves. 

 Heads yellow or purple, not small. Bracts narrow, acute, 

 nearly equal. Akenes flattish, soft-hairy, with 4 short pappus- 

 scales. 



1. H. heterochroma Gray. Robust, V/ 2 to 5 ft. high, very 

 sticky and of disagreeable odor. Leaves oblong, coarsely 

 toothed. Heads ^ in. high, the 40 to 60 rays saffron-color 

 and scarcely exceeding the bracts. — On gravelly slopes above 

 Mirror Lake. Yosemite Valley is the type locality of this 

 species. It ranges to southern California. 



2. H. brevifolia Gray. Stems ^ to 2 ft. high, glandular. 

 Leaves narrowly oblong, toothed, 1 or 2 in. long. Heads 

 nearly 1 in. high, including the 10 to 20 showy yellow rays. — 

 Mariposa Grove (type locality) to Clouds Rest, Mt. Watkins, 

 and Indian Creek; also on slopes above Mirror Lake. 



3. H. algida Gray. Perennial, stout, 1 ft. or less high, 

 glandular and the heads very woolly. Leaves narrowly ob- 

 long, toothed, 2 to 4 in. long. Heads solitary, terminating 

 the stems, 1 in. high, including the many yellow rays. — Above 

 timber-line on Mt. Dana (type locality) and other high peaks 

 throughout the Sierra Nevada. 



32. HELENIUM. Sneezeweed. 

 F.rect herbs, ours perennial with alternate entire leaves, the 



