1907 J Hall. Compositae of Southern California. 107 



of the fertile flowers woolly toward the apex, glabrous toward 

 the more or less narrowed base: bracts of the staminate flowers 

 spatulate, woolly on the back. 



Mohave Desert, Lemmon, ace. to Gray ; east to Texas. 



32. FILAGO L. 



Low woolly annuals with more or less glomerate small heads. 

 Receptacle hemispherical or conical. Fertile pistillate flowers 

 in two sets, the outer set separated from the inner by a circle of 

 open scarious or chaff-like nearly glabrous bracts ; flowers of the 

 outer set, which is borne on the margin of the receptacle, com- 

 monly destitute of pappus, each loosely enfolded by a concave 

 or boat-shaped long-woolly bract : flowers of the inner set pro- 

 vided with a pappus of copious capillary bristles, not enfolded 

 by bracts. Hermaphrodite flowers in the center of the head few, 

 often fertile, their pappus abundant. Achenes terete or nearly 

 so, either smooth or minutely granular. 



Plant erect: bracts of the inflorescence scarcely longer than the heads 



1. F. California. 



Plant depressed and spreading: bracts of the inflorescence short, obtuse.... 

 2. F. depressa. 



Plant erect or spreading : bracts of the inflorescence linear, elongated, sev- 

 eral times longer than the heads 3. F. Arizonica. 



1. F. Californica Nutt., Trans. Am. Philos. Soc. ser. 2, vii. 

 405 (1841). 



Plant or its branches erect, .5 to 2 (or sometimes 4) dm. high, 

 leafy throughout: leaves .8 to 2 cm. long, narrowly oblong to 

 linear or somewhat spatulate, sessile, commonly apiculate at 

 apex : heads ovate, 3 or 4 mm. high, scarcely exceeded by the 

 bracts of the inflorescence ; receptacle convex, rough : bracts of 

 the outer pistillate flowers 8 to 10, very woolly, deeply boat- 

 shaped and somewhat incurved at the broad and obtuse hyaline 

 tip ; bracts of the inner series thin and less woolly, plane or 

 merely concave; all stellately spreading at maturity: marginal 

 achenes smooth; central achenes either smooth or dotted with 

 shining papillae. 



Common in dry open places of the Cismontane Area from 

 Guadalupe Island and Ensenada, Sonora, north throughout the 

 state, and ascending the mountains to 2200 m., ace. to Parish; 



