COMPOSITE FAMILY 259 



hill species, reaching Crockers, Wawona, and the west end 

 of the Pohono trail. H. mollis Gray, a similar species but 

 soft-hairy and the heads in peduncled clusters, has been 

 reported from Yosemite Valley. It is common in the foot- 

 hills. 



27. WHITNEYA. 

 1. W. dealbata Gray. A white-leaved perennial, 9 to 18 in. 

 high. Leaves opposite, oblanceolate to obovate, entire, V/2 to 

 3 in. long, soft with silvery hairs. Heads long-peduncled, 

 showy, the yellow rays 24 to 1 in. long and becoming papery. 

 Pappus none. — A rare plant, found on Cherry Creek, near the 

 Yosemite Valley, and at the Mariposa Grove. 



28. ERIOPHYLLUM. 



Our species white-woolly plants with yellow radiate heads. 

 Involucre with rigid, erect bracts. Akenes linear. 



1. E. confertifldrum DC. A bushy perennial, woody below, 

 9 to 18 in. high, the small heads in compact clusters termin- 

 ating erect stems. Leaves Yi to 1 in. long, with 3 to 7 narrow 

 lobes. Rays Y% in. long. Pappus of 8 to 10 short scales. — 

 Occasional below 6500 ft., on warm, rocky slopes. 



2. E. lanatum Forbes. A low spreading perennial herb 

 (under 12 in.) with many solitary naked heads on long erect 

 peduncles. Leaves narrowly spatulate to obovate, 1 in. or less 

 long, entire or lobed. Rays about Y§ in. long. Pappus of short 

 scales. — Crockers and Sentinel Dome to the crest of the 

 Sierra Nevada, occurring in a variety of forms which have 

 not yet been properly named by the botanist (JS. caespitosum 

 var. leucocephalum Gray, and var. integrifolium Gray). 



3. E. nubigenum Greene. A low annual, 2 to 6 in. high, 

 with erect short-peduncled heads among the upper leaves. 

 Leaves lanceolate-spatulate, ^ to ^ in- long, entire. Rays 

 scarcely % in. long, yellow. Pappus of about 10 narrow scales 

 one-third the length of the akene. — Known only from Clouds 

 Rest, at about 9000 ft. alt., where first collected by Mrs. 

 Katharine Brandegee. 



29. RIGIOPAPPUS. 

 1. R. leptocladus Gray. A slender erect annual, 1 ft. or 

 less high, with scattered heads (^ in. high). Leaves alter- 

 nate, linear. Rays very short. Akenes linear, with a pappus 

 of 3 to 5 sharp rigid awns. — Foothills, reaching 4000 ft. alt. on 

 the South Fork of the Tuolumne. 



