1907] Hall.Compositae of Southern California. 89 



pappus-bristles rather numerous, the shorter outer ones con- 

 spicuous. 



Abundant on stony hillsides at Cushenberry Springs, on the 

 desert base of the San Bernardino Mts., Parish, who only has 

 collected it. 



3. E. concinnus (H. & A.) T. & G., Fl. ii. 174 (1841). Dis- 

 tasis ? concinna H. & A., Bot. Beech. 350 (1840). 



Stems numerous, erect, from a strong perennial caudex, more 

 or less branched : herbage gray with a long hispid pubescence : 

 leaves linear-spatulate, acute, 2 to 5 cm. long : heads terminating 

 slender peduncles, hemispheric, nearly 1 cm. in diameter: ligules 

 numerous, narrow, 5 to 8 mm. long, violet or blue or rarely white : 

 outer pappus of conspicuous subulate to oblong paleae. 



Providence Mts., Mohave Desert, in the Upper Sonoran Zone, 

 May 26, 1902, Brandegee; Sierra Nevada and Rocky Mts. 



Var. aphanactis Gray, Proc. Am. Acad. vi. 540 (1865). E. 

 aphanactis Greene, Fl. Fr. 389 (1897). Heads discoid, the li- 

 gules being very short or wanting. San Bernardino Mts., from 

 1950 m. alt. in the Transition Zone of Bear Valley to 3450 m. 

 alt. in the Alpine Zone of Mt. San Gorgonio; also in Colorado, 

 Nevada, etc. The range of variation in the pappus is as great 

 in the variety as in the species ; it cannot therefore be specifically 

 separated, the absence of rays not constituting a specific charac- 

 ter. Certain of our specimens, notably those gathered on the 

 summit of Sugarloaf Peak, San Bernardino Mts., by Professor 

 and Mrs. Grinnell, under no. 211, are only 4 or 5 cm. high and 

 with scapose stems leafy only below. In general appearance 

 they seem quite different from the more northern form, but a 

 collection from Nevada by Shockley exhibits intermediate forms. 



4. E. linearis (Hook.) Piper, Contr. U.S. Nat. Herb. xi. 567 



(1906). Diplopappus linearis Hook., FL Bor. Am. ii. 21 (1834). 

 E. filifolius Gray, Syn. Fl. i. pt. 2, 213 (1884) ; not E. filifolius 

 Nutt., Trans. Am. Philos. Soc. ser. 2, vii. 308 (1841). 



Stems rather numerous, slender, 1.5 to 3 dm. high from a 

 slender scarcely woody base, usually branched above and bear- 

 ing several or numerous heads: herbage canescent or cinereous 

 with a fine close pubescence : leaves crowded, all linear-filiform or 



