Sunflower Tribe 415 



1. H. annuus L. Robust, hispid or scabrous; stems often 

 2.5 cm. high, thick, mottled or spotted with purple; leaves all 

 but t lie lowest alternate, acute or acuminate, more or less regu- 

 larly dentate or denticulate, 10-25 cm. Long, petiolate; involu- 

 cral bracts broadly ovate to oblong, aristiform-acuminate ; disk 

 2 cm. broad or more, dark purple or brown; rays often 5 cm. 

 long. 



A common weed in all the valleys. 



2. H. Oliveri Gray. Rather stout, 2-4 m. high, leafy through- 

 out, soft-villous and somewhat tomentose, not at all roughened ; 

 haves all alternate, lanceolate, 10-17 cm. long, tapering to an 

 acute point, and at base into a short-margined petiole, nearly 

 entire, obscurely 3-nerved near the base; involucre villous, its 

 bracts linear-subulate, not surpassing the disk; rays 2.5 cm. long; 

 palea of pappus subulate from broad base. 



Cienega; East Los Angeles. 



3. H. Parishii Gray. Stems slender, 2-5 m. high, simple or 

 branched above; leaves elongated-lanceolate, softly cinereous- 

 puberulent or canescent beneath, scabrous above; heads 10-15 

 mm. high ; rays 20-35 mm. long; involucral bracts linear-subulate, 

 longer than the disk, villous toward the base; disk-corollas with 

 a silky-villous ring or 2 tufts above the short proper tube ; palea? 

 of the pappus slender-subulate. 



Oak Knoll. Grant. Rather frequent in the San Bernardino Valley. 



30. ENCELIA Adans. 



Herbs or low shrubs with alternate or opposite leaves, 

 and usually with large peduncled heads of both ray- and 

 disk-flowers, the rays neutral yellow, the disk yellow or 

 brownish, perfect. Receptacle flat, convex or conic, 

 chaffy ; chaff usually soft and mainly scarious. Achenes 

 flattened, thin-edged, often villous. Pappus none or an 

 awn or its rudiment to each margin of the wingless 

 achene. 



1. E. Californica Nutt. Woody at base, branched above, 6-12 

 dm. high, strong-scented, minutely pubescent; leaves ovate to 

 oblong-lanceolate, rarely denticulate or toothed, about 5 cm. long, 

 green and glabrate; heads commonly solitary, the disk about 2 

 cm. broad, brownish or purplish; involucre white- villous ; rays 



