(64) 



2. Grindelia. — Scales of the involucre her- 

 baceous. Pappus aristate. Rays yel- 

 low. 



3. Gutierrezia. — Scales of the involucre her- 

 baceous. Pappus short, paleaceous. 

 Kays yellow. 



bb. Branches of the style not flat hut tapering , 

 sometimes loith an appendix. 



1. Coinogyne. — Involucre regularly imbri- 

 cate. Scales broad. 



2. Burriellia. — Involucre consisting of 3-5 

 scales. 



3. Bseria. — Scales of the involucre in a single 

 series. Receptacle conical, minutely 

 maricate. Akenes linear. 



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



volucre not embracing any akenes. Re- 

 ceptacle convex (not conical). Akene 

 linear, with large terminal areola. 



5. Monolopia. — Scales of involucre united 

 at base. Receptacle conical. Akene 

 obloQg, with small terminal areola. 



6. Lasthenia. — Scales of involucre united 

 into a dentate cup. Receptacle conical. 

 Pappus 0. 



7. Rigiopappus. — Scales of involucre lin- 

 ear. Receptacle Hat. Paj)pus 4-5 aris- 

 tate scales. 



