9^8 FLORA. 



4. Erigeron caespitdsus Nutt. Tufted Erigeron. (I. F. f. 3814.) Stems 

 tufted, canescent, simple, or branched abuve, 1.5-3 dm. high. Leaves canescent 

 or pubescent, entire, the lower and basal ones petioled, narrowly oblanceolate or 

 spatulate, 2-7 cm. long; heads solitary or several, short-peduncled, 25-37 mm. 

 broad; bracts lanceolate or linear-oblong, acute, canescent; rays 40-60, 6-12 mm. 

 long, white or pinkish; pappus double, the outer series of bristles very short. In 

 dry soil, Manitoba and the N. W. Terr, to Neb., N. Mex. and Cal. June-Aug. 



5. Erigeron pumilus Nutt. Low Erigeron. (I. F. f. 3815.) Stems tuited, 

 slender, simple, or branched, I-2.5 dm. high. Leaves entire, hirsute, the lower 

 and basal ones narrowly spatulate or linear, petioled, 2-10 cm. long, 2-4 mm. 

 wide; stem-leaves linear; heads 12-20 mm. broad, short-peduncled; bracts linear, 

 acute, hirsute; rays 50-80, white, 6-8 mm. long, at length deflexed; pappus 

 double, the outer row of bristles short and more or less intermixed with the inner; 

 achenes pubescent. Dry plains, S. Dak. to N. W. Terr., western Kans., Br. Col. 

 and Utah. May-Sept. 



6. Erigeron canus A. Gray. Hoary Erigeron. (I. F. f. 3816.) Stems 

 slender, erect, tufted, 15-25 cm. high, simple, or branched above. Leaves nar- 

 row, entire, canescent, the basal and lower ones narrowly spatulate. petioled, 5-10 

 cm. long, the upper linear, sessile, acute, gradually smaller; heads solitary, or 2- 

 4, 12-15 mm - broad; bracts linear, acute, densely canescent; rays 40-50, purple 

 or white, 4-6 mm. long; pappus double, the outer row of bristles rather conspicu- 

 ous. In dry soil, S. Dak. to western Neb., Wyo., Colo, and N. Mex. June-Aug. 



7. Erigeron hyssopifoliusMichx. Hyssop leaved Erigeron. (I. F. f. 3817.) 

 Perennial by slender rootstocks; stems tufted or single, very slender, simple or 

 branched, glabrous or very nearly so. 10-35 cm. high. Leaves narrow, thin, the 

 basal and lower ones oblong or spatulate, short-petioled, 2-4 cm. long, 3-4 mm.; 

 wide, the upper linear or linear-oblong, acute, heads solitary or several, slender- 

 peduncled, 10-15 mm. broad; bracts linear-lanceolate, sparingly pubescent; rays 

 20-30, white or purplish, 4-6 mm. long; pappus simple. On moist cliffs, Newf. tc 

 Vt., the N. W. Terr, and Lake Superior. July-Aug. 



8. Erigeron flagellaris A. Gray. Running Fleabane. (I. F. f. 38] 

 Appressed-pubescent, sometimes densely so. Stem slender, branched, the branches 

 elongated; leaves entire, the basal and lower ones spatulate or oblong, obtuse 01 

 acute, 2-5 cm. long, narrowed into long petioles, the upper sessile, linear or iinear- 

 spatulate, much smaller; peduncles solitary, elongated; heads about 25 mm. broad 

 and 6 mm. high; rays very numerous, white to pink; pappus double, the outei 

 series of subulate bristles. In moist soil, S. Dak. to Colo., Utah, Tex. and N. Mex. 

 May-July. 



9. Erigeron pulchellus Michx. Robin's or Poor Robin's Plantain. (I 

 F. f. 3819.) Perennial by stolons and offsets, villous-pubescent; stems simple 

 slender, 2.5-6 dm. high. Basal leaves tuited, spatulate or obovate, somewhj 

 cuneate at the base, narrowed into short margined petioles, obtuse at the apex. 

 7 cm long, 1-5 cm. wide, dentate or serrate; stem- leaves sessile, partly clasping 

 oblong, lanceolate to ovate, mostly acute, entire, or sparingly serrate; heads i-B 

 slender-peduncled, bracts linear, acuminate, villous; rays numerous, violet 

 purplish, 8-14 mm. long; achenes nearly glabrous; pappus simple. On hills an< 

 banks, N. S. to Ont., S. Dak., Fla. and La. April-June. 



10. Erigeron Philadelphicus L. Philadelphia Fleabane. Skevish 

 (I. F. f. 3820.) Perennial by stolons and offsets, soft-pubescent or sometime 

 nearly glabrous; stems slender, mostly branched above, 3-9 dm. high. Basal an 

 lower haves spatulate or obovate, obtuse, dentate, 2-7 cm. long, narrowed int 

 short petioles; upper stem-leaves clasping and often cordate at the base ; head 

 several or numerous, corymbose-paniculate. 10-25 mm - broad, slender-pedunclec 

 bracts linear, usually scurious-margined; achenes puberulent. In fields and wood* 

 throughout N. Am., except the extreme north, but locally rare. April-Aug. 



11. Erigeron divergens T. & G. Spreading Fleabane. (I. F. f. 3821 

 Annual or biennial, diffusely branched, 15-37 cm. high, densely cinereol 

 pubescent or hirsute. Basal and lower leave? spatulate or oblanceolate, acute < 

 obtuse, mostly petioled, entire, dentate or lobed, 2-5 cm. long. 4-10 mm. wid« 

 the upper sessile, linear or narrowly spatulate, usually acute, gradually smalle 

 heads 16-25 mm. broad bracts linear, icute, hirsute or canescent; rays about io< 



