438 Senecioneae 



mostly in 1-2 series. Receptacle naked. Pappus-bristles 

 soft, commonly copious and usually white. 



Shrubby or suffrutescent plants. 

 Rays wanting. 



Bracts imbricated ; leaves mostly scale-like. 61. LEPIDOSPARTUM 



Bracts in 1 series ; herbage woolly. 62. TBTRADYMIA. 



Rays present 63. SENECIO. 



Herbs; rays present or wanting. 63. SENECIO. 



61. 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 our interior valleys. July-October. 



62. 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 gla- 

 brous. 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 . 



