COMPOSiTAE. 



VOL. III. 



6. Erigeron canus A. Gray. Hoary Erigeron. 

 Fig. 4366. 



Erigeron canus A. Gray, Mem. Am. Acad. (II) 4: 67. 1849. 



Perennial by a deep woody root, resembling the pre- 

 ceding species; stems slender, erect, tufted, appressed- 

 canescent, 6'-io' high, simple, or branched above. Leaves 

 narrow, entire, canescent, the basal and lower ones nar- 

 rowly spatulate, petioled, 2'-4' long, the upper linear, 

 sessile, acute, gradually smaller; heads solitary, or 2-4, 

 peduncled, 6"-8" broad ; involucre hemispheric, its bracts 

 linear, acute, densely canescent ; rays 40-50, purple or 

 white, 2"-3" long; achenes glabrous, 8-io-nerved; pap- 

 pus double, the outer row of bristles rather conspicuous. 



In dry soil, South Dakota to western Nebraska, Wyoming. 

 Colorado and New Mexico. June-Aug. 



7. Erigeron hyssopifolius Michx. Hyssop- 

 leaved Erigeron. Fig. 4367. 



Erigeron hyssopifolius Michx. Fl. Bor. Am. 2 : 123. 



1803. 

 Aster graminifolius Pursh, Fl. Am. Sept. 545. 1814. 



Perennial by slender rootstocks; stems tufted 

 or single, very slender, simple or branched, gla- 

 brous or very nearly so, 4'-iS' high. Leaves nar- 

 row, thin, the basal and lower ones oblong or 

 spatulate, short-petioled, I'-iY long, ii"-2" wide, 

 the upper linear or linear-oblong, acute, usually 

 numerous; heads solitary or several, slender- 

 peduncled, s"-8" broad ; peduncles appressed- 

 pubescent; involucre nearly cylindric at flower- 

 ing time, its bracts linear-lanceolate, sparingly 

 pubescent ; rays 12-30, white or purplish, 3"-6" 

 long; pappus simple. 



On moist cliffs, Newfoundland to northern Ver- 

 mont, Mackenzie and Lake Superior. July-Aug. 



8. Erigeron flagellaris A. Gray. Run- 

 ning Fleabane. Fig. 4368. 



Erigeron flagellaris A. Gray, Mem. Am. Acad. (II) 

 4: 68. 1849. 



Appressed-pubescent, sometimes densely so, 

 perennial by decumbent rooting stems or sto- 

 lons; root slender; stem slender, branched, 

 the branches elongated. Leaves entire, the 

 basal and lower ones spatulate or oblong, ob- 

 tuse or acute, i'-2' long, narrowed into long 

 petioles, the upper sessile, linear or linear- 

 spatulate, much smaller ; peduncles solitary, 

 elongated ; heads about i' broad and high ; 

 involucre hemispheric, its narrow bracts pu- 

 bescent ; rays very numerous, white to pink ; 

 pappus double, the outer series of subulate 

 bristles. 



In moist soil, South Dakota to Wyoming, Utah, 

 western Texas and New Mexico. May-July. 



