[24 Madieae 



smooth, nearly straight, pointless. Receptacle flat ; 

 chaff a single row of distinct bracts surrounding aboul 

 5 perfed bul sterile disk-flowers. Pappus none. 



1. L. ramosissima Nutt. Canescent with a loose silky pubes- 

 cence, 2-8 dm. high , diffusely paniculate ; lowest leaves spatulate- 

 obovate, stem-leaves lanceolate to linear, all entire; heads 6 nun. 

 high, 12 mm. broad, including the expanded rays: achenes 3 

 nun. long. 



Frequent in open places in the foothills and in t he chaparral belt of the 

 mountains. May-September. 



42. BLEPHARIPAPPUS Hook. 



Vernal annuals with alternate leaves or the Lowest 

 opposite, and usually showy heads of white or yellow 

 flowers terminating the branches. Bracts of the invo- 

 lucre flattened on the back, more or less completely 

 enfolding their obcompressed achenes. Kays 8—20 

 3-lobed ; their achenes obovate or narrower, destitute of 

 pappus. Disk-flowers with cylindraceous funnelform 

 5-lobed corollas ; their achenes linear-cuneiform, usually 

 with a pappus of bristles or awns. Receptacle flat, bear- 

 ing a series of chaffy bracts between the ray- and disk- 

 flowers. (Layia.) 



*Pappus-bristle8 villous below the middle. 



1. B. hispidus Greene. Diffusely branched from the base or 

 simple, .'! dm. high or less, hispid throughout with spreading 

 hairs and with a few small dark -stalked glands on the upper si 



leaves and involucres; leaves all narrow and entire; rays white, 

 about 1 cm. long; pappus bright white, the bristles densely vil- 

 lous below the middle. 



Frequent In dry washes in the interior valleys. Big Tejunga; La Canada ; 

 Arroyo Seco. 



2. B. elegans (Nutt.) Greene. Habit of the last but taller, 



I v hirsute and mere or less stipitate-glandular throughout ; 

 lower leaves pinnatejy toothed, the upper entire; rays yellow, 



