396 ASTERACEAE. 



paniculate, about 12-15 mm. high; involucral bracts lanceolate, 

 acute; flowers all alike; achenes clavate, flattened; pappus a small 

 minutely annular disk. 



Common in the chaparral belt of all the mountains. April- 

 June. 



55. HULSEA T. & G. 



Viscid or floccose-woolly leafy herbs with alternate 

 entire toothed or pinnatifid leaves, sessile or nearly so, 

 and large solitary or scattered heads. Involucral bracts 

 thin, herbaceous, linear to oblong, in 2-3 series. Recep- 

 tacle flat. Ray-flowers yellow or purplish. Disk-flowers 

 with long narrow throat and 5 short lobes. Achenes 

 linear-clavate or cuneate-oblong, villous. Pappus of 

 4-5 hyaline paleae, either erose or lacerate at the sum- 

 mit or dissected into capillary bristles. 



1. H. heterochroma Gray. Annual, stout, 6 dm. high or more; 

 leaves oblong, saliently dentate; involucre about 2 cm. high, its 

 bracts linear-lanceolate, attenuate-acute; ray-flowers many, 6-8 mm. 

 long, rose-purple, occasionaly reduced or obsolete; paleae oblong, 

 the 2 over the angles of the achenes longer than the others, the 

 shorter truncate-lacerate. 



Occasional in the San Gabriel Mountains in the upper portions 

 of the chaparral belt. Mount Lowe, Dudley; Wilson's Peak. 



56. HELENIUM L. Sneeze weed. 



Erect perennial resinous-dotted herbs, with alternate 

 leaves sessile except the lowest and often decurrent on 

 the stem. Heads solitary or corymbose, borne on long 

 naked peduncles. Flowers yellow, those of the ray 

 several, usually small and drooping, those of the disk 

 numerous, minute, often brownish. Bracts of the invo- 

 lucre linear, reflexed. Receptacle globose or hemi- 

 spheric, naked. Achenes turbinate, ribbed, usually more 

 or less pubescent. Pappus of 5- 1 2 thin or hyaline paleae. 



1. H. puberulum DC. Puberulent, paniculately branched, 6-12 

 dm. high, the branches ending in slender peduncles; leaves lanceolate 

 or narrowly linear or the longest oblong, sessile and strongly decur- 

 rent on the stem; heads globose, 10-15 mm. broad; ray-flowers and 

 bracts of the involucre reflexed, short and inconspicuous; disk- 

 flowers brownish; pappus-scales ovate, with a short slender awn; 

 achenes about 1 mm. long. 



Frequent along mountain streams, especially in the chaparral 

 belt. 



