Senecioneae 437 



summit, with a small terminal areola. Pappus none or 

 minute and coroniform. 



1. A. heterophylla Nutt. Perennial; stems erect, somewhat 

 woody at base, 1-2 m. high ; leaves lanceolate to oblong, ovate or 

 elliptic, 5-10 cm. long, sparingly pinnatifid, cleft or often entire, 

 green above, white-tomentose beneath; heads mostly erect in 

 dense terminal panicles, the axis leafy; involucre oblong; margi- 

 nal flowers pistillate; disk-flowers perfect, all fertile. (A. vulga- 

 ris Calif ornica Bess.) ... ... ._.., 



Common in low ground and along streams in the foothills. July-October. 



2. A. biennis Willd. Annual ; stems erect, virgate, 3-10 dm. 

 high, leafy to the summit; herbage deep green, glabrous and 

 nearly tasteless, aromatic ; leaves 1-2-pinnately parted into lanceo- 

 late or broadly linear laciniate or toothed lobes, or the upper- 

 most only pinnatifid; heads small, in close glomerules on the 

 spiciform short branches and stems ; involucre hemispheric ; 

 achenes with small epigynous disk. 



Occasional in low moist ground about Los Angeles. Native of Europe. 



3. A. dracunculoides Pursh. Perennial; stems clustered, 

 herbaceous, 6-12 dm. high, virgately branched, glabrous, pungent- 

 scented when bruised, tasteless; lowest leaves 3-cleft at summit, 

 the others linear, entire; heads numerous, nodding on very slen- 

 der short peduncles in a close or open panicle, the clusters some- 

 times secund ; involucre hemispheric, about 2 mm. broad ; margi- 

 nal flowers fertile ; disk-flowers perfect, sterile. 



Frequent in the valleys and foothills throughout our range. August- 

 October. 



4. A. Californica Less. (CALIFORNIA SAGE.) Shrubby, with 

 numerous ascending branches, 6-12 dm. high, aromatic; leaves 

 cinereous with a minute appressed pubescence, the lowest parted 

 into a few linear filiform segments, the upper entire ; heads 

 many, nodding in long racemose leafy panicles; involucre hemi- 

 spheric, about 4 mm. broad ; achenes truncate at summit, with a 

 squamellate or coroniform-dentate pappus. 



Common on dry hillsides in the lower altitudes of the chaparral belt. 

 September-December. 



Tribe 9. SENECIONEAE. GROUNDSEL TRIBE. 



Herbs or suffrutescent plants with alternate or basal 

 leaves. Involucral bracts little or not at all imbricated, 



