904 MISC. PUBLICATION 423, U. S. DEPT. OF AGRICULTURE 



9. Heads cymose or panicled or, if solitary, then not leafy-bracted; involucre 



strongly graduated, or else much shorter; style appendages less than 



twice as long as the stigmatic portion, or else (in A. sco-pulorum) 



obtusish (10). 



10. Leaves spatulate to broadly obovate, entire, obtuse or apiculate, 8 to 



23 mm. long, 3 to 15 mm. wide; heads small, discoid, in small 



terminal cymes 10. A. cuneatus. 



10. Leaves linear to linear-lanceolate or cuneate or, if spatulate, then 

 the heads radiate (11). 

 11. Heads radiate (12). 



12. Leaves densely glandular-punctate, essentially linear, not more 

 than 2 mm. wide; involucre 2- or 3-seriate, not strongly grad- 

 uated, 3 to 5 mm. high 11. A. LARICIFOLIUS. 



12. Leaves obscurely if at all glandular-punctate, often stipitate-gland- 

 ular or resinous, spatulate to obovate, 2 to 5 mm. wide, cuspi- 

 date-pointed; involucre several-seriate, strongly graduated (13). 

 13. Plant densely stipitate-glandular; leaves spatulate to oblance- 

 olate, 15 to 20 mm. long, 2 to 3 mm. wide. 



12. A. WATSONI. 

 13. Plant glabrous but often glutinous; leaves obovate or spatulate- 

 obovate, 8 to 15 mm. long, 3 to 5 mm. wide. 



13. A. CERVINTJS. 

 11. Heads discoid (14). 



14. Leaves linear-lanceolate, 3-ribbed, entire or with a minutely 



spinulose-denticulate margin; style appendages linear, much 



longer than the stigmatic region, sometimes twice as long; 



corolla teeth 1.5 to 2 mm. long (15). 



15. Leaves densely impressed-punctate 14. A. salicinus. 



15. Leaves not impressed-punctate 15. A. scopulorum. 



14. Leaves linear to cuneate or broader, 1-nerved, entire to toothed 



or pinnatifid; style appendages deltoid or triangular, shorter 

 than the stigmatic region; corolla teeth not more than 1 mm. 

 long (16). 



16. Leaves pinnatifid, the lobes linear, several times as long as the 



breadth of the leaf rachis 16. A. tenuisectus. 



16. Leaves entire or sometimes with a few teeth, occasionally 

 subpinnatifid, the lobes then scarcely longer than the breadth 

 of the leaf rachis (17). 

 17. Phyllaries with a thickened apex bearing a large rounded 

 gland; leaves entire to laciniate-pinnatifid. 



17. A. acradentus. 



17. Phyllaries scarcely thickened at apex, without a distinct 



gland; leaves usually entire (18). 



18. Heads 7- to 15-flowered, smaller, the involucre 3.5 to 5 



mm. high, the phyllaries obscurely if at all green-tipped. 



18. A. HETEROPHYLLUS. 



18. Heads 18- to 30-flowered, larger, the involucre 6 to 8 mm. 

 high, the phyllaries definitely greenish-tipped. 



19. A. DRUMMONDII. 



1. Aplopappus nuttallii Ton. and Gray, Fl. North Amer. 2: 242. 

 1842. 



Eriocarpum grindelioides Nutt., Amer. Phil. Soc. Trans, ser. 



2, 7: 321. 1840. Not Aplopappus grindelioides DC., 1836. 

 Sideranthus grindelioides Britton in Ryclb., Torrey Bot. Club 



Bui. 27: 620. 1900. 



Apache, Navajo, and Coconino Counties, 5,500 to 8,000 feet, barren 

 rocky hills and plains, June to August. Saskatchewan to Alberta, 

 south to Nebraska, New Mexico, and northern Arizona. 



The Hopi Indians make a tea from the roots, which they administer 

 for coughs. 



