294 . ~ * Oo MPosIT AC: 
SuBTRIBE I. Homocuromm. Disk wholly of hermaphrodite 
flowers, of the same color as the ray when that is present, 
mostly yellow: f 
3. Grindelia. Pappus of few elongated awns or rigid bristles, heads 
usually radiate, solitary at the ends of the branches: coarse herbs with 
sessile rigid mostly serrate leaves. 
4. Chrysopsis. Pappus of numerous setose bristles both in disk and 
ray, manifestly double, the inner capillary, the outer very short and 
squamellate, low ieafy stemmed perennials with sessile entire or nearly ~ 
entire leaves ) 
56. Ammodia. Pappus of slender setose bristles obscurely double, the 
inner capillary, the outer very short and setulose or obsolete: low per- 
ennial herbs © ! 
6. Eriocarpum Pappus white or nearly so. of exceedingly unequal 
somewhat flattened barbellate bristles: achenes short, densely silky ; low 
herbs with narrow sparsely dentate leaves. 
7. Pyrrocoma. Pappus reddish-br wn or fulyous, of numerous uniform 
slender rigid bristles: achenes linear, elongated, somewhat turbinate, 
3-angled and striate: glabrous, rigid perennial herbs with mostly radical 
leaves. 
8. Stenotus. Vappus commonly bright white, of numerous soft nnequal 
densely scabrous capillary bristles: achenes oblong-turbinate densely 
silky-vi lous: glabrous shrubby plants with narrow entire leaves. 
9. Macronema. Pappus of soft slender bristles: achenes slender, com- 
pressed, few-nerved: soft pubescent low and many-stemmed suffrutescent 
plants with thinnish sessile entire leaves. 
10. Chrysothamnus. |’appus of soft subequal bristles: achenes narrow, 
not compressed: shrubby or half shrubby. plants with narrow entire 
subcoriaceous leaves. 
11. Euthamia. Wappus of numerous equal capilfary scabrous bristles in 
one or more series:,achenes short and turbinate: villous pubescent; 
‘perennial herbs with linear entire 1-nerved leaves. 
i%. Solidago. Pappus of numerous capillary scabrous bristles: achenes 
terete or angulate 5-12-nerved or costate: perennial herbs with entire or 
serrate leaves. 
SuBTRiBE 0. HerrrocHromEs. Disk flowers mostly yellow 
the rays white, red, purp!e or blue; seldom yellow. 
18. Bellis. l’appus none: achenes obovate and compressed, nerveless 
except at the margins: low perennial herbs with all radical leaves 
14, Boltonia. Pappus of several short-setulose squamellz and 2-4 elon- 
gated rigid awns:achenes obovate, very flat, with callous or winged mar- 
gin: leafy-stemmed perennials. 
15. Townsendia. Pappus a single series of long awns: achenes obovate 
or oblong, much compressed. with thickish or callous margins: depres- 
sed or low many-stemmed herbs 
16. Sericocarpus. ‘‘appus of numerous unequal scabrous bristles: 
achenes narrow, little compressed, 2-nerved, silky-pubescent: leafy- 
stemmed perennials. 
17. Aster. Pappus of numerous dull white scabrous bristles: achenes 
compressed: leafy-stemmed herbs with panicled or somewhat corym- 
bose heads of flowers. 
