W ATSON—Plants of Bernalillo County 
*Involucre of narrow, equal, erect bracts, herbage more 
or less white-wooly; no glands, ligules persistent. 
Bracts very woolly on back; no pappus (28) BarLerya. 
**Ingules not persistent on the achenes; disk 
flowers numerous ; no owl glands ; leaves alter- 
nate wm ours. 
Receptacle flat or convex, achenes form linear to 
obpyramidal, rarely 5-angled, occasionally with 
intermediate nerves; flowers all fertile. 
Bracts of involere wholly herbaceous and flat; corolla- 
lobes short; pappus of several scarious 
scales, - : - (29) BaHta. 
Bracts mostly saneBand: aa thin, dry and usually 
colored tips; ray flowers none; leaves alternate. 
Pappus of 15 to 20 thin, dey, colorless, obtuse 
scales, - - (30) HYMNENOPAPPUS. 
Pappus of 6-12 equal scales, with a strong midrib 
running thru the entire length 
- mate - - - (81) PoLyprERIs. 
So Receptacle convex to oblong; achenes short, 5-10 
ribbed or angled, mostly silky-villous or hirsute ; 
No awn-like hairy bracts on the receptacle, 
: antes - - - - (32) ACTINELLA. 
With awn-like hairy bracts on_ the 
receptacle - - - - (83) GAILLARDIA. 
***Involucre of the small heads of a few equal 
united bracts in one row; leaves opposite; no 
oul-glands 
Heads several flowered, pappus none, one ray 
- - Bie - - - (34) FLAVERIA. 
**%% Herbage and involucre dotted with the oil 
glands 
Style branches of perfect flowers long 
Bracts of involucre generally united at base only 
or with some loose bracts, rays few and incon- 
spicuous, - - - (35) pysopra. 
Involucre united into a single cup; rays 
oblong - - (36) HYMENATHERUM. 
Style-branches of perfect flowers very short. 
Bracts of involucre in one row, keeled (37) prctts. 
Tripe vi. ANTHEMIDEAEF. Distinguished from the 
two preceding tribes by the more or less dry and pa- 
pery bracts; pappus none ; leaves alternate. 
Receptacle chaffy; heads with rays, (88) AcHILLEA. 
Receptacle naked; heads discoid, (39) ARTEMESTA. 
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