(64) 



2. Grindelia. Scales of the involucre her- 

 baceous. Pappus aristate. Bays yel- 

 low. 



3. Gutierrezia. Scales of the involucre her- 

 baceous. Pappus short, paleaceous. 

 Bays yellow. 



bb. Branches of the style not flat but tapering, 

 sometimes with an appendix. 



1. Coinogyne. Involucre regularly imbri- 

 cate. Scales broad. 



2. Burriellia. Involucre consisting of 3-5 

 scales. 



3. Baeria. Scales of the involucre in a single 

 series. Beceptacle conical, minutely 

 muricate. Akenes linear. 



4. Eriophyllum (Bahia). Scales of the in- 

 volucre not embracing any akenes. Be- 

 ceptacle convex (not conical). Akeue 

 linear, with large terminal areola. 



5. Monolopia. Scales of involucre united 

 at base. Beceptacle conical. Akeiie 

 oblong, with small terminal areola. 



6. Lasthenia. Scales of involucre united 

 into a dentate cup. Receptacle conical. 

 Pappus 0. 



7. Bigiopappus. Scales of involucre lin- 

 ear. Receptacle flat. Pappus 4-5 aris- 

 tate scales. 



