WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 619 
Pappus not plumose. 
Pappus, at least in part, of scales, or these reduced 
and united into a crown. 
Involucre simple, that is, with no short calycu- 
late outer bracts; outer pappus of minute 
scales scarcely visible except under a 
strong lens; flowers yellow.............-- 4, 
Involucre with few or many calyculate outer 
bracts; outer series of pappus conspicuous; 
flowers yellow or blue. 
Flowers blue; plants caulescent........-..-- 5. 
Flowers yellow; plants acaulescent......... 6. 
Pappus of capillary bristles. 
Achenes flattened. 
Achenes narrowed at the top or beaked; pap- 
pus bristles falling separately; invo- 
lucres cylindric............---------- 7. 
Achenes truncate; pappus bristles not falling 
separately; involucres campanulate.. 8. 
Achenes not flattened. 
Pappus bristles promptly deciduous, usually 
together.................2022-2220--- 9. 
Pappus persistent or tardily deciduous. 
Achenes with distinct slender beaks. 
Plant caulescent; pappus tawny....10 
Plants scapose; pappus white or 
nearly so, 
Achenes 10-ribbed or nerved; 
not spinose-muricate; in- 
volucres more or less im- 
bricated............---- 11 
Achenes 4 or 5-ribbed ; muricate- 
spinulose, at least near 
the apex; involucre of a 
single series of equal in- 
ner bracts with some ca- 
lyculate outer ones......12 
Achenes not beaked. 
Flowers rose-colored, never yellow. 
Receptacle bearing capillary 
Receptacle naked. 
Pappus scabrous; heads 15 
to 20-flowered; cau- 
line leaves not scale- 
like. One species 
a) oe 14 
Pappus not scabrous; heads 
3 to 12-flowered; cau- 
line leaves scalelike 
or none.......-.---- 15 
CynTHIA (p. 621). 
CicHortuM (p. 622). 
Uropaprus (p. 622). 
Lactuca (p. 622), 
Soncuus.(p. 623), 
MALACOTHRIX (p. 624). 
. Srtmias (p. 624). 
. AGOSERIS (p. 624). 
. Taraxacum (p. 626). 
. CALYCOSERIS (p. 627). 
. Hreracrum (p. 627). 
. LyGoprsmia (p. 628). 
