ASTERACEAE: ASTEREAE 171 
Heads radiate. 
Leaves spinulose-dentate. 5. Sideranthus. 
Leaves entire or toothed, not spinulose-dentate. 
Stem low, woody, leaves evergreen. 6. Stenotus. 
Stem entirely herbaceous, leaves not evergreen. 
Rays not more,numerous than the diskflowers, leaves 
* mostly lanceolate, rarely linear-lanceolate. 
7. Solidago. 
Rays more numerous than the diskflowers, leaves linear- 
lanceolate. 8. Euthamia. 
Ray flowers blue, pink, purple or white, never yellow. 
Pappus a mere crown of a few scales or awn-like bristles. 
Plants low, not even 2 dm. high. 9, Townsendia. 
Plants tall, erect, 6 dm. or more high, 10. Boltonia. 
Pappus of numerous capillary bristles. 
Rays, slightly, if at all exceeding the pappus. 
Heads 8-12 mm, broad, bracts in 2-3 series. 13. Brachyactis. 
Heads about 4 mm. broad, bracts in 1-2 series. 16, Leptilon. 
Rays conspicuous, longer than the pappus, usually equaling or 
exceeding the diameter of the disk. 
Bracts in several series, the outer shorter, usually well imbri- 
cated. 
Disk-flowers yellow turning red, brown or purple. 
Leaves entire or serrate, the teeth not bristle tipped. 
2 11. Aster. 
Leaves lobed or incised-dentate, the lobes bristle tipped. 
14. Machaeranthera. 
Disk-flowers permanently white. 12. Leucelene. 
Bracts in 1-2 series, little imbricated, rays numerous 20-150. 
15. Erigeron. 
1. Gutierrezia. 927, 
1. Gutierrezia sarothrae (Pursh.) Britton & Rusby. 
In dry or rocky soil in the western part of the state. Banner County; 
Belmont; Callaway; Deuel County; Ft, Niobrara; Hat Creek Basin; 
Pine Ridge; Scotts Bluff County; Valentine. 
2. Grindelia. 928. 
1. Grindelia squarrosa (Pursh.) Dunal, Gum-weed. 
In dry soil over most of the state. Ainsworth; Callaway; Lincoln; 
Nebraska City; Minden; Scotts Bluff County; Thedford; Rushville; 
Wahoo. 
3. Chrysopsis. 929. 
Leaves appressed canescent, plants 3-6 dm. high. 1, C, villosa. 
Leaves hispid or hirsute with a spreading pubescence, plants rarely 
over 3 dm. high. 
Leaves copiously hairy, only slightly viscid. 
Leaves mostly subsessile, heads peduncled, stems 2-3 dm. high. 
3. C. horrida. 
