(116) 



1. GLABRA L. — 0. Ballast weed, introduced 

 from Europe. Summer. 



66. (Microseris) Scorzonella Nutt. 



Involucre campanulate, imbricate in several 

 ranks. Receptacle Hat, naked, foveolate. 

 Akenes more than 5-costate; pappus palea- 

 ceous; palese entire, lanceolate, tipped with a 

 barbellate awn. Heads nodding when in bud. 

 Plant caulescent. Flowers j^ellow. 



1. S. PROCERA Gray. Head more than 100- 

 flowered; awns simply barbellate, 3 times longer 

 than the pale*. — U- Sonoma. Summer. 



2. S. PALUDOSA Greene. Head less than 

 75 flowered; awns simply barbellate, twice as 

 long as the palese. — 7i. Marshy grounds. 

 Marin County near Corte Madera. Summer. 



3. S. SYLVATICA Gray. Awns nearly plum- 

 ose, shorter than the paleae. — li. Contra 

 Costa. Summer. 



67. {Microseris) Calais DC. 



Involucre conical, imbricate. Keceptacle 

 flat, alveolate. Akenes more than 5-costate; 

 palei\3 of the pappus 5, flat, bifid, with short 

 awns. Head always erect on hollow, scape- 

 like peduncles, that swell toward the head. 

 Flowers yellow. 



