1907] HallCompositae of Southern California. 181 



Diffusely branched from the base, 2 to 10 cm. high, often 

 forming mats 1 dm. in diameter : flocculent tomentum deciduous 

 except from the heads : leaves 1 cm. or less long, broadly spat- 

 ulate, mostly with 2 or 3 short rounded lobes or teeth at the apex : 

 heads in leafy-bracteate close terminal clusters : involucre 3 mm. 

 high: receptacle nearly flat: rays 3 to 7, yellow, 2 mm. long: 

 achenes sparsely pubescent, soon glabrate: pappus of 10 to 15 

 narrow somewhat fimbriate paleae, continued above into subulate 

 awns, nearly as long as the corolla, sometimes lacking in part or 

 all of the disk-flowers. 



Common in Southern California west of the mountains and 

 north to the upper Salinas Valley. Also in southern Arizona, 

 ace. to Gray, and therefore to be expected in our Desert Area. 



2. E. Pringlei Gray, Proc. Am. Acad. xix. 25 (1883). Actin- 

 olepis Pringlei Greene, Fl. Fr. 441 (1897). 



Stem much branched from the base, forming dense woolly 

 tufts 1 to 5 cm. high and 15 cm. or less in diameter : leaves and 

 heads as in the last preceding but rays lacking: achenes ap- 

 pressed-pubescent : pappus-paleae silvery-scarious, broadly lan- 

 ceolate, obtuse, erose, equalling the corolla-tube. 



Plentiful in gravelly soil on the Mohave Desert and the sur- 

 rounding mountains (even to 1800 m. alt.) ; ranging west to Mt. 

 Pinos, Ventura Co., Hall, no. 6322, north to the Greenhorn 

 Range, Hall & Babcock, no. 5075, and east into Arizona, ace. to 

 Gray. 



3. E. lanosum Gray, Proc. Am. Acad. xix. 25 (1883). Bur- 

 rielia lanosa Gray, Pacif. R. Rept. iv. 107 (1857). Actinolepis 

 lanosa Gray, Proc. Am. Acad. ix. 198 (1874). 



Plant 4 to 10 cm. high, the few to numerous branches ascend- 

 ing or erect: leaves linear, mostly entire, 1 cm. or less long: heads 

 scattered on more or less elongated naked peduncles: involucre 

 narrow, 5 or 6 mm. high : receptacle convex, obtuse : rays white 

 or rose-color, 5 mm. long: anther-tips subulate: style-branches 

 obtuse : achenes sparsely pubescent : pappus of about 5 paleaceous 

 awns nearly as long as the corolla and as many obtuse alternating 

 paleae of half this length. 



A rare species occurring from Lower California and along 



