1907] Hall. Compositae of Southern California. 51 



finally hemispheric, 8 mm. high, its well imbricated green bracts 

 ending in a rigid setaceous tip : rays pale yellow : achenes pubes- 

 cent, slightly flattened, either with or without a strong nerve on 

 each face. 



Southwestern San Diego Co. and southward into Lower 

 California. 



14. ERICAMERIA Nutt. 



Evergreen shrubs, with linear or terete leaves except in our 

 first species. Foliage commonly punctuate and resiniferous. 

 Inflorescence various but usually paniculate or cymose. Heads 

 either heterogamous or homogamous, even on the same plant. 

 Involucre narrowly to broadly turbinate (hemispheric in vernal 

 heads of E. pinifolia) the chartaceous or coriaceous bracts rigidly 

 imbricated but not in distinct vertical rows, the outer ones 

 passing into small bracts of the peduncle. Ray-flowers either 

 present or lacking; disk-corollas ampliate upward, 5-toothed. 

 Style-appendages exserted (scarcely so in some species), filiform 

 or subulate in all but E. monactis. Achenes slender. Pappus- 

 bristles slender, scabrous, dull white or yellowish, in age reddish. 



The genus as here defined corresponds to Haplopappus 

 Ericameria of Gray's Synoptical Flora, so amplified as to include 

 Bigelovia Euthamiopsis of the same work. Its small narrow 

 involucres with chartaceous bracts are the only marks to dis- 

 tinguish it from Haplopappus ; but to one familiar with its species 

 it forms a definite group. The style-appendages are always 

 slender and exserted except in E. monactis, which also in other 

 respects connects Ericameria to Haplopappus. It would be easy 

 to follow Greene in extending Ericameria (which he would now 

 merge into Chrysoma) to include certain species of Chrysotham- 

 nus which have a similar general aspect (C. teretifolius, panicu- 

 latus, etc.). These, however, are apparently not derived from 

 the same immediate stock and may well remain in Chrysotham- 

 nus, mainly because of their narrow involucres with bracts in 

 distinct vertical series. 



Leaves obovate or oblanceolate, spatulate: var. spatulata of 



1. E. cuneata. 



Leaves linear or filiform (or lanceolate in no. G). 



Style-appendages oblong-ovate, acute: involucral bracts 8 to 10: rays 1 

 or 2 or wanting 2. E. monactis. 



