bb. 
( 64 ) 
Grindelia.—Scales of the involucre her- 
baceous. Pappus aristate. Rays yel- 
low. 
Gutierrezia.—Scales of the involucre her- 
baceous. Pappus short, paleaceous. 
Rays yellow. 
Branches of the style not flat but tapering, 
sometimes with an appendia. 
Coinogyne.—Involucre regularly imbri- 
cate. Scales broad. 
Burriellia.—Involucre consisting of 3-5 
scales. 
Beria.—Scales of the involucre in a single 
series. Receptacle conical, minutely 
maricate. Akenes linear. 
Eriophyllum (Bahia).—Scales of the in- 
volucre not embracing any akenes. Re- 
ceptacle convex (not conical). Akene 
linear, with large terminal areola. 
Monolopia.—Scales of involucre united 
at base. Receptacle conical. Akene 
oblong, with small terminal areola. 
Lasthenia.—Scales of involucre united 
into a dentate cup. Receptacle conical. 
Pappus 0. 
Rigiopappus.—Scales of involucre lin- 
ear. Receptacle flat. Pappus 4-5 aris- 
tate scales. 
