424 Madieae 



smooth, nearly straight, pointless. Receptacle flat ; 

 chaff a single row of distinct bracts surrounding about 

 5 perfect but 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 mm. 

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

 mm. long. 



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

 mountains. May-September. 



42. BLEPHABJPAPPUS 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-bristles villous below the middle. 



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

 simple, 3 dm. high or less, hispid throughout with spreading 

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

 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, 

 sparsely hirsute and more or less stipitate-glandular throughout; 

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



