ASTERACEAE. 389 



enfolding their obcompressed achenes. Rays 8-20, 

 3-lobed; their achenes obovate or narrower, destitute of 

 pappus. Disk-flowers with cyHndraceous funnelform 

 5-lobed corollas; their achenes linear-cuneiform, usually 

 with a pappus of bristles or awns. Receptacle flat, bear- 

 ing a series of chaffy bracts between the ray- and disk- 

 flowers. 



Pappus bristles villous below the middle. 



Leaves all entire; rays white. 1. L. glandulasa. 



Leaves toward the base pinnately toothed; 



rays yellow. 2. L. elegons. 



Pappus bristles naked. 3. L. platyglossa. 



1. L. glandulosa (Hook)' H. & A. Diffusely branched from the 

 base or simple, 3 dm. high or less, hispid throughout with spreading 

 hairs and with a few small dark-stalked glands on the uppermost 

 leaves and involucres; leaves all narrow and entire; rays white, 

 about 15 mm. long; pappus bright white, the bristles densely villous 

 below the middle. 



Frequent in dry washes in the interior valleys. Big Tejuriga; 

 La Canada; Arroyo Seco. 



2. L. elegans (Nutt.) Torr. & Gray. Habit of the last but taller, 

 sparsely hirsute and more or less stipitate-glandular throughout; 

 lower leaves pinnately toothed, the upper entire; rays yellow, about 

 1 cm. long; pappus white, bristles densely villous below the middle. 



Frequent on our dry interior plains. San Fernando Valley; 

 Pasadena; Santa Ana Mountains. 



3. L. platyglossa (F. & M.) Gray. Stems usually about 3 dm. 

 high and sparingly branched, hirsute and stipitate-glandular; lower 

 leaves pinnatifid into linear lobes; rays 10-15 mm. long, yellow 

 with cream-colored tips; disk-achenes silky-hirsute; pappus of 15- 

 20 scabrous tawny bristles. 



Frequent in sandy soil, especially along the coast. 



44. ACHYRACHAENA Schauer. 



Soft-pubescent sparingly branched annual, with nar- 

 row leaves, all but the lowest alternate, and rather large 

 oblong-campanulate heads terminating pedunculiform 

 branches. Involucral bracts lanceolate, herbaceous, each 

 enfolding a ray-achene. Bracts of the low convex recep- 

 tacle membranous in a single row between ray- and 

 disk-flowers. Ray-flowers 6-8, very short, 3-cleft; their 

 achenes slightly obcompressed, destitute of pappus. 

 Disk-flowers mostly fertile, clavate, 10-striate, bearing a 

 showy pappus of 10 elongated-oblong obtuse silvery- 

 scarious palese. 



