(101) 



minate, with scarious margins, each completely 

 enclosing the corresponding raj-akene. Recep- 

 tacle flat, with 5 pale-13 between the disc and 

 ray. Pappus 0. — 0. Flowers yellow, whitish. 



1. L. ra:\iosissima Nutt. Pubescent.--©. 

 Tamalpais. Summer. 



2. L. CONGESTA Greene. Hispid. — 0. Tam- 

 alpais. Summer. 



36. Layia Hook. & Am. 



Superflua. Head x-flowered; ray -flowers cune- 

 iform, 3-dentate. Involucre 1-seriate, herbace- 

 ous; scales acuminate, with scarious margins, 

 completely enclosing the ray-akenes. Receptacle 

 flat, with a row of palecB between disc and ray, 

 or paleaceous throughout. Ray-akenes linear, 

 attenuate at the base, and with a flat area at 

 the top; pappus of the disc various; of the 

 ray 0.— 0. 



1. L. CARNOSA Torr. & Gray. Pappus bris- 

 tles plumose; ray-flowers inconspicuous, small. 

 Sands of sea shore. Marin County. Spring. 



2. L. HRTEROTRICHA Hook. & Am. Pappus- 

 bristles plumose, their hairs erect; ray-flowers 

 large, canspicuous, 3-lobed, white. — Antioch. 

 Livermore. Niles. Spring. 



3. L. ELEGANS Torr. & Gray. Pappus- 

 bristles plumose, their hairs woolly and inter- 

 laced; ray-flowers conspicuous, yellow. — Marin 

 County. Spring. 



