86 University of California Publications in Botany. [VOL. 3 



ing linear and entire : heads terminating bracted branches of the 

 cymose panicle : involucre 1 cm. high, imbricated, the green tips 

 of the bracts recurved at least in mature heads : receptacle alveo- 

 late, the alveoli toothed: rays few, 5 to 15 mm. long, bluish- 

 purple, rarely wanting: achenes narrowed below, pubescent. 



In the San Bernardino Mts. at Barton Flat, Mrs. Wilder, no. 

 603, and at Gold Mt, Grinnell, no. 91, also on South Fork, Santa 

 Ana River, Hall, nos. 7525, 7672 ; Swartout Canon, San Antonio 

 Mts., Geo. R. Hall (heads mostly discoid, some with 1 or 2 rays) ; 

 Frazier Mt. and Mt. Pinos, Ventura Co., Hall, nos. 6597, 6678 

 (uniformly discoid) ; Mt. Pinos, ace. to Elmer (1. c. under Mach- 

 aeranthera Pinosa, heads radiate) ; Providence Mts., Brandegee. 



Var. tephrodes Gray, Syn. Fl. i. pt. 2, 206 (1884). A. in- 

 canus Gray, Bot. Calif, i. 322 (1876). Machaeranthera teph- 

 rodes Greene, Pitt. iv. 24 (1899) ? Root probably always 

 biennial : herbage canescent, especially the broad involucres, the 

 bracts of which are provided with long attenuate herbaceous 

 tips: rays numerous, about 1 cm. long. San Jacinto Valley, 

 Colorado Desert, and east into Arizona and New Mexico. 



23. LEUCELENE Greene. 



Low perennials with very leafy stems from a ligneous base. 

 Heads small, solitary and terminal on the simple stems or ulti- 

 mate branchlets. Involucre broadly turbinate; bracts very un- 

 equal, closely imbricated in about 3 unequal series, herbaceous 

 but with hyaline margins. Rays white or reddish. Disk-flowers 

 yellow or reddish (white, ace. to Greene), tubular-funnelform, 

 shortly 5-toothed. Style-tips ovate or oblong, obtuse. Achenes 

 compressed, pubescent. Pappus a single series of scabrous white 

 bristles. 



1. L. ericoides (Torr.) Greene, Pitt. iii. 148 (1896). In- 

 ula ? ericoides Torr., Ann. Lye. N. Y. ii. 212 (1828). Aster 

 ericaefolius Rothrock, Bot. Gaz. ii. 70 (1877). Erigeron Jacin- 

 teus Hall, Univ. Calif. Pub. Botany, i. 127 (1902). 



Five to 15 cm. high : stems crowded, simple and monocepha- 

 lous or cymosely branched, the heads then terminating leafy 

 branchlets: herbage cinereous with a short strigose pubescence: 



