388 



COMPOSITAE. 



[Vol. III. 



VUU-CLlt-K. 



g. Erigeron pulchellus Michx. 

 Roljin's or Poor Robin's Plan- 

 tain. (Fig. 3819.) 



F.. pulchellus Michx. Fl. Bor. Am. 2: 124. i8oj(. 

 Erigeron bellidi/olius Muhl.; Willd. Sp. PI. 3: 



195S. 1804. 



Perennial by stolons and offsets, villous- 

 pubescent; stems simple, slender, io'-24' 

 high. Basal leaves tufted, spatulate or obo- 

 vate, somewhat cuneate at the base, nar- 

 rowed into short margined petioles, obtuse 

 at the apex, I'-j' long, }i'-2' wide, dentate 

 or serrate; stem-leaves sessile, partly clasp- 

 ing,oblong, lanceolate to ovate, mostly acute, 

 entire, or sparingly serrate; heads 1-6, slen- 

 der-peduncled, I'-i'/i' broad; involucre 

 depressed-hemispheric, its bracts linear, 

 acuminate, villous; rays numerous, violet or 

 purplish, 4"-"" long; achenes nearly gla- 

 brous; pappus simple. 



On hills and banks, Nova Scotia to Ontario 

 and Minnesota, south to Florida and Louisiana. 

 Called also Rose Petty, Robert's Plantain and 

 Blue Spring Daisy. April-June. 



10. Erigeron Philadelphicus L. 



Philadelphia Fleabane. Skevish. 



(Fig. 3820.) 



Erigeron Philadelphicus L. Sp. PI. 863. 1753. 



Perennial by stolons and offsets, soft-pubes- 

 cent or sometimes nearly glabrous; stems slen- 

 der, mostly branched above, i°-3° high. Basal 

 and lower leaves spatulate or obovate, obtuse, 

 dentate, i'-3' long, narrowed into short petioles; 

 upper stem-leaves clasping and often cordate at 

 the base, obtuse or acute, dentate or entire; 

 heads several or numerous, corymbose-panicu- 

 late, 5"-l2" broad, slender-peduncled; pedun- 

 cles thickened at the summit; involucre de- 

 pressed-hemispheric, its bracts linear, usually 

 scarious-margined; rays 100-150, 2"-\" long, 

 light rose-purple; pappus simple; achenes pu- 

 berulent. 



In fields and woods, tliroughout North America 

 except the extreme north, but locally rare. Buds 

 drooping. Called also Sweet Scabious and Daisy 

 Fleabane. April-Aug. 



II. Erigeron divergens T. & G. 



Spreading Fleabane. (Fig. 3821.) 



Erigeron divergens T. & G. Fl. N. A. 2: 175. 1841. 

 Annual or biennial, diffusely branched, 6'-i5' 

 high, densely cinereous-pubescent or hirsute. 

 Basal and lower leaves spatulate or oblanceolate, 

 acute or obtuse, mostly petioled, entire, dentate 

 or lobed, i'-2' long, 2"-5" wide, the upper ses- 

 sile, linear or narrowly spatulate, usually acute, 

 gradually smaller; heads slender-peduncled, 8"- 

 12" broad, usuall}' numerous; involucre hemi- 

 spheric, about 2" high, its bracts linear, acute, 

 hirsute or canescent; rays about 100, purplish, 

 violet or nearly white, 2"-4"long; pappus double, 

 the short outer row of bristles subulate. 



In uioist soil, Montana to Nebraska, Texas and 

 Mexico, west to Washington and California, .\pril- 

 Sept. 



