ASTERACEAE. 401 



62. LEPIDOSPARTUM Gray. 



A low rigid green scaly-bracted almost leafless shrub, 

 somewhat fastigiately branching, and bearing some- 

 what corymbose or racemosely arranged heads of pale 

 yellow flowers. Involucral bracts of 2 sets, the inner 

 long, linear, 8-12 in 2 or more series, the outer much 

 shorter and imbricated. Receptacle naked. Rays none. 

 Disk-flowers with long tube and lanceolate-linear spread- 

 ing lobes. Achenes oblong, terete, 8-10-nerved, with 

 large epigynous disk. Pappus copious, of soft white 

 capillary bristles. 



1. L. squamatum Gray. Branching shrub, broom-like, 6-12 

 dm. high; young seedlings and shoots floccose-tomentose, and with 

 spatulate entire leaves, becoming glabrous and nearly leafless in 

 age; heads 6-10 mm. high, terminal on the branches. 



Frequent in dry washes in all the interior valleys. July-October. 



63. TETRADYMIA DC. 



Low rigid canescently tomentose shrubs with alter- 

 nate narrow entire leaves and cymose-clustered discoid 

 heads of yellow flowers. Involucre long and narrow, 

 of 4-6 bracts. Corollas with long tube, the narrow 

 spreading lobes longer than the campanulate involucre. 

 Achenes terete, short, 5-nerved, from long-villous to 

 glabrous. Pappus of fine and soft long capillary white 

 or whitish bristles. 



1. T. comosa Gray. Branches erect, elongated, 4-8 dm. high; 

 primary leaves linear, softly floccose-tomentose, the earlier 5-7 cm. 

 long, and 4 mm. wide, plane; those of the branches often filiform, 

 deciduous, some of the upper changed to long soft spines; heads 

 corymbose or glomerate at the summit of the branches; involucre 

 5-9-flowered, its bracts 5-6; pappus fine, concealed by the long wool 

 of the achene. 



Dry washes of the interior valleys, perhaps not within our region 

 but found as far westward as Cucamonga. July-August. 



64. SENECIO L. 



Annual or perennial herbs or shrubs, with alternate 

 or basal leaves, and solitary corymbose or paniculate 

 many-flowered heads of both tubular and ray-flowers or 

 only tubular, in ours yellow. Involucre cylindric or 

 campanulate, its principal bracts in 1 series, distinct or 

 united at the base, usually with some shorter outer ones. 

 Receptacle flat or somewhat convex, mostly naked. 



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