Aster Tribe 399 



lanceolate and with a greenish midrib, the loose outer ones subu- 

 late, shorter than the inner and passing into the small leaves of 

 the flowering branchlets; rays usually 6-10; achenes glabrous or 

 nearly so. (Aplopappus pinifolius Gray.) 



Frequent in the foothills of the San Gabriel Mountains in the lower alti 

 tudes of the chaparral belt. August-November. 



11. ISOCOMA Nutt. 



Rather rigid tufted erect suffrutescent plants, with 

 thick leaves and a corymbose terminal cluster of rather 

 small rayless heads. Involucral bracts coriaceous, closely 

 imbricated, the tips herbaceous, appressed. Corollas 

 permanently yellow ; tube slender ; limb ventricose, its 

 segments more or less connivent about the style. Style- 

 appendages ovate or somewhat narrower, pubescent. 

 Achenes short, compressed or subterete, silky-pubescent, 

 Pappus-bristles numerous, unequal, the inner longest 

 and often flattened and awn-like, faintly scabrous. 



1. I. vernonioides Nutt. Glabrous or commonly loosely 

 pubescent, 6-12 dm. high, erect; leaves oblanceolate, more or 

 less serrate, 2-4 cm. long, often with many fascicled ones in their 

 axils; heads 8 mm. high, campanulate; bracts of the involucre 

 obtusish ; pappus-bristles stout, none very perceptibly flattened. 

 (Bigelovia veneta Gray.) 



Common on dry hillsides and plains. Santa Monica; Los Angeles; Santa 

 Ana Mountains ; San Joaquin Hills. July-November. 



12. HAZARDIA Greene. 



Low shrubs or suffrutescent plants, with subcoriaceous 

 more or less persistent toothed or serrate leaves, and 

 spicate or somewhat thyrsoidly congested heads. Invo- 

 lucre oblong or obconic, its numerous bracts in many 

 series, often with squarrose-spreading tips. Heads 20-40- 

 flowered. Rays yellow or none. Disk-corollas narrow, 

 merely 5-toothed, yellow, changing to red or brown. 

 Style-tips linear-subulate. Achenes fusiform, slightly 

 compressed, few-nerved. Pappus reddish. 



