P'PER FLORA OF THE STATE OF WASHINGTON. 571 



Loavps serrate, not firm ; hrarts not riojid, loose 5. A. major. 



Involucre not viscid or glandular. 

 Heads less than 1 cm. broad. 



Rays purple; involucre turl)inate B. ,1. anietJii/.'^tiniis. 



Rays usually white; involucre campanulnte. 



Herbage harshly puberulent 7. - 1 . mnlli/Ionis. 



Herbage not harshly pul)enilent. 



Involucral bracts acute 8. A .oregarms. 



Involucral bracts obtuse 9. .1 . hfiJlii. 



Heads more than 1 cm. broad. 



Involucral bracts closely appressed, mainly coriaceous. 

 Akenes glabrous. 



Leaves glaucous, entire ... 10. ,1. Inerifi. 



Leaves green, serrate, glabrous IL .1. clmcri. 



Akenes pubescent; leaves pulwrulent, entire 12. A. jcfisicac. 



Involucral bracts looser, largely herbaceous. 



Leaves few, large, scarcely reduced upward, (he 

 cauline with auriculate or clasping bases. 



Heads solitary or few, long-pedunclcd; leaves 



' dai k green, usually glabrous _ 13. . ! . folidccus. 



Heads several: stems leafy to the top; leaves 



thin, pale, usually pubescent 11. .1. rudckii. 



Leaves numerous, either small, or much reduced 

 upward; cauline sessile, not at all am-iculate. 

 Pubescent throughout; involucral ])rac(s 



herbaceous, lanceolate, flat 1 .5. , 1 . irnffii. 



Glabrous or nearly so; involucral bracts nar- 

 row, acute. 



Involucral bracts, at least the outer ones, 

 foliaceous and pa.ssing into the leaves. 



Leaves firm, entire, numerous IB. .1. eatoni. 



Leaves thinner, less numerous, usually 



serrate near the middle 17. .1. (longlfi.vl. 



Involucral bracts not at all foliaceous. 

 Heads corymbose. 



Leaves serrulate, those of the 



inflorescence much reduced. . IS. A. ocnilenlalis. 

 Leaves entire, those of the inflo- 

 rescence not much reduced 19. A. frcmontii. 



Heads solitary, naked-pedunculate... 20. A. t<tenomeres. 



1. Aster conspicuus Lindl. Hook. Fl. Bor. Am. 2: 7. 1834. 

 Aster macdowjalii Coult. & Fisher, Bot. Gaz. 18: 301. 1893. 

 Type locality: "Carlton House." Collected by Drummond. 



Range: British Columbia to Saskatchewan south to Oregon and Montana. 



Specimens e.xamined. Peshastin, Sai^dhergd' Leiherg -iOi: foothills near Wenache, Whitid 

 li, 1290, 1294; Ophir, FJmtr 529; Lake Chelan, Lale ct Thdl 692, Alma, Elmer 538; Fort 

 Colville,Z(/aZ/ in 1860; Geger; Spokane Q.o\\x\ty,Siilcfidorf 927; Kamiak Wwite, Piper; near 

 Colton, Piper, July, 1898; Blue Mountains, Piper, July and August, 1896. 



Zonal distribittion: Arid Transition. 



2. Aster radulinus A. Gray, Proc. Am. Acad. 8: 388. 1872. 

 Aster radula Less. Linnaea 6. 125 1831, not Ait. 1789. 

 Type locality: "In California." Collected by Chamisso. 

 Range: Wasliington to California. 



