COMPOSITAE. 969 



purplish, violet or nearly white, 4-8 mm. long; pappus double, the short outer 

 row of bristles subulate. In moist soil, Mont, to Neb., Tex., Mex., Wash, and 

 Cal. April-Sept. 



12. Erigeron Bellidiastrum Nutt. WESTERN DAISY FLEABANE. (I. F. f. 

 3822.) Annual, much branched, cinereous-pubescent throughout. Leaves entire, 

 linear- spatulate, the lower and basal petioled, 2-4 cm. long, the upper sessile and 

 smaller; heads several, or numerous, 10-16 mm. broad; involucre hemispheric, 

 about 4 mm. high, its bracts linear, hirsute, acute; rays 30-65, white or purplish, 

 about 4 mm. long; pappus a single series of capillary bristles. In moist soil, Neb. 

 and Kans. to Tex. May-July. 



13. Erigeron annuus (L.) Pers. SWEET SCABIOUS. DAISY FLEABANE. (I. 

 F. f. 3823.) Annual, sparingly pubescent, with spreading hairs; stem erect, 

 corymbosely branched. Leaves thin, the lower and basal ones ovate or ovate-lance- 

 olate, mostly obtuse, petioled, usually coarsely dentate, 5-15 cm. long, 2-7 cm. wide, 

 the upper sessile or short-petioled, lanceolate, oblong, or linear-lanceolate; heads 

 rather numerous, 10-14 nim. broad; bracts somewhat hispid; rays 40-70, linear, 

 white, or commonly tinged with purple, 4-8 mm. long; pappus double, the inner a 

 series of slender fragile deciduous bristles, often wanting in the ray -flowers, the 

 outer a persistent series of short, partly united, slender scales. In fields, N. S. to 

 the N. W. Terr., south to Va., Ky., Kans. and Mo. Nat. in Europe. May-Nov. 



14. Erigeron ramosus (Walt.) B. S. P. DAISY FLEABANE. (I. F. f. 3824.) 

 Resembles the preceding species, but is usually lower and the pubescence more 

 appressed. Stem- leaves linear-oblong, or linear -lanceolate, nearly all of them 

 entire; basal and lowest spatulate or oblong, usually serrate; bracts of the invo- 

 lucre glabrous or nearly so; pappus similar to that of the preceding; rays white, 

 or sometimes purplish, occasionally minute or wanting. In fields, N. S. to the 

 N. W. Terr., south to Fla., La. and Tex. May-Nov. 



Erigeron ramosus Beyrichii (F. & M.) Smith & Pound. Stem more slender; leaves 

 narrower ; heads smaller ; pubescence minute. Ga. to Neb. and Tex. 



15. Erigeron vernus (L.) T. & G. EARLY FLEABANE. (I. F. f. 3825.) 

 Perennial by stolons and offsets; stem slender, simple or branched above, glabrous, 

 or the branches pubescent, 3-5 dm. high. Leaves mainly in a basal rosette, 

 glabrous, obovate, oval or spatulate, obtuse, repand-denticulate or entire, 5-10 cm. 

 long, narrowed into margined petioles; stem-leaves mostly reduced to subulate- 

 lanceolate scales; heads not numerous, corymbose, peduncled, about I cm. broad; 

 rays 20-30, white or pink, 4-6 mm. long; pappus simple; achenes usually 4- 

 nerved. In marshes and moist soil, Va. to Fla. and La. April-May. 



16. Erigeron acris L. BLUE OR BITTER FLEABANE. (I. F. f. 3826.) Bien- 

 nial or perennial; stem hirsute-pubescent, slender, simple, or branched above, 1.5- 

 4.5 dm. high. Leaves pubescent or glabrous, entire, the basal and lower ones 

 spatulate, mostly obtuse, 2-7 cm. long, petioled, those of the stem mostly oblong or 

 oblanceolate, obtuse or acutish, sessile, shorter; heads several or numerous, race- 

 mose or paniculate, peduncled, 10-12 mm. broad; bracts linear, hirsute; rays 

 numerous, purple, equalling or slightly exceeding the brownish pappus; tubular 

 pistillate flowers numerous; pappus simple or nearly so, copious. Lab. to Br. Col., 

 south in the Rocky Mts. to Colo, and Utah. Also in Europe and Asia. July-Aug. 



Erigeron icris DroebachiJlnus (O- F. Mueller) Blytt. Usually taller and less pubes- 

 cent, or glabrate; involucre nearly glabrous. N. B. to western Ont., Alaska, Br. Col. and 

 Colo. Also in Europe. 



Erigeron icris ddbilis A. Gray. Slightly pilose-pubescent, very slender; heads few. 

 Range of the last. 



36. LEPTILON Raf. 



Annual or biennial herbs, with small racemose thyrsoid or panicled heads of 

 white flowers, the rays small, usually shorter than the diameter of the disk or none. 

 Involucre mostly campanulate, its narrow bracts in 2 or 3 series. Receptacle 

 naked. Ray-flowers pistillate; disk-flowers perfect, their corollas usually 4-lobed 

 or 4- toothed, the anthers obtuse at the base; style-branches somewhat flattened, 

 their appendages short. Achenes flattened. Pappus of numerous simple fragile 

 bristles in 1 series. [Greek, referring to the small heads.] About 20 species, 



