Helenieae 425 



about 1 crn. long; pappus white, bristles densely villous below 

 the middle. 



Frequent on our dry interior plains. San Fernando Valley; Pasadena; 

 Santa Ana Mountains. 



** Po.ppus-bristles naked. 



3. B. platyglossus (F. & M.) Greene. Stems usually about 

 3 dm. high and sparingly branched, hirsute and stipitate-glan- 

 dular ; 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. 



43. ACHYBACHAENA 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. 



1. A. xnollis Schauer. Erect, 2-4 dm. high; leaves linear, 

 entire or serrulate ; heads 2.5 cm. long or less in flower ; rays very 

 short and involute, yellow, changing to reddish-brown ; heads ex- 

 panded in fruit, forming a globose cluster ; pappus becoming very 

 showy. 



Occasional in the coast valleys, on grassy plains or in grain fields. Ex- 

 tending south to San Diego. 



Tribe 7. HELENIEAE. SNEEZEWEED TRIBE. 



Herbs or suffrutescent plants with alternate or oppo- 

 site leaves. Receptacle naked or with a few fimbrillse. 

 Involucral bracts in 1-2 series or rarely in o series. 

 Pappus of paleae, awns or bristles, or wanting. 



