COMPOSITAE (COMPOSITE FAMILY) 817 



oblanceolate, wholly foliaceous ; rays pinkish, longer than the style. Saline 

 soil, P. E. I.; Wyo. to N. Mex., and westw. July-Oct. FIG. 976. 



23. ERIGERON L. FJ.EABANB 



Heads many-flowered, radiate, mostly flat or hemispherical ; the narrow rays 

 very numerous, pistillate. Involucral bracts narrow, equal, and little imbri- 

 cuicd, never coriaceous, neither foliaceous nor green-tipped. Receptacle flat or 

 convex, naked. Achenes flattened, usually pubescent and 2-nerved ; pappus 

 a single row of capillary bristles, with minuter ones intermixed, or with a dis- 

 tinct short outer pappus of little bristles or chaffy scales. Herbs, with entire 

 or toothed and generally sessile leaves, and solitary or corymbed naked-pedun- 

 culate heads. Disk yellow ; rays white, pink, or purple. (The ancient name 

 presumably of a Senecio, from Up, spring, and ytpuv, an old man, suggested 

 by the hoariness of some vernal species.) 



1. EUERfGERON DC. Rays elongated (short in a form of no. 7), crowded 

 in one or more rows. 



* Leafy-stemmed perennials. 

 t- Pappus double. 



1. E. glabSllus Nutt. Stem 1.5-4 dm. high, stout, hairy above, the leafless 

 summit bearing 1-7 large heads ; leaves nearly glabrous, except the margins, 

 entire, the upper oblong-lanceolate and pointed, closely sessile or partly clasp- 

 ing, the lower spatulate and petioled ; rays more than 100, purple, more than 

 twice the length of the hoary-hispid involucre ; outer pappus of minute bristles. 

 (E. asper Nutt.) Plains of n. Wise., Man., and westw. June-Sept. 



-*- -t- Pappus simple. 

 ++ Stems slender, densely tufted, very leafy ; leaves narrowly linear, entire. 



* 2. E. hyssopifblius Michx. Slightly pubescent, 1-3 dm. high, from filiform 

 rootstocks ; branches prolonged into slender naked peduncles, bearing solitary 

 small heads ; rays 20-30, rose-purple to whitish. Wet calcareous rocks, Nfd. 

 and Lab. to Mackenzie, s. to N. B., Me., Vt., and Mich. June, July. 



*+ ++ Stems stouter, not tufted; leaves broader, toothed. 



3. E. pulchellus Michx. (ROBIN'S PLANTAIN.) Hairy, producing offsets 

 from the base ; stem simple, rather naked above, bearing few (1-9) large heads 

 on slender peduncles ; basal leaves obovate and spatulate, sparingly toothed, the 

 cauline distant, lanceolate-oblong, partly clasping, entire ; rays (about 60) rather 

 broad, light bluish-purple. (E. bellidifolius Muhl.) Copses and moist banks, 

 s. Me. to Ont., Minn., and southw. Apr.-June. 



4. E. philad^lphicus L. Hairy ; stem leafy, corymbed, bearing several small 

 heads ; leaves thin, with a broad midrib, oblong ; the upper snioothish, clasping 

 by a heart-shaped base, mostly entire ; the lowest spatulate, toothed ; rays 

 innumerable and very narrow, rose-purple or flesh-color. Throughout, locally 

 common, generally in alluvial soil. May-Aug. 



* * Perennial by rosulate offsets, with scape-like stems ; pappus simple. 



5. E. ve"rnus (L.) T. & G. Glabrous; leaves clustered at the base, oval or 

 spatulate ; scape leafless, slender, 3-7 dm. high, bearing 5-12 small corymbed 

 heads; rays white. (E. nudicaulis Michx.) Low grounds, e. Va., and 

 southw. May. 



* * * Annuals (or sometimes biennials}, leafy-stemmed and branching ; pappus 

 double, the outer a crown of minute scales, the inner of deciduous fragile 

 bristles, usually wanting in the ray. 



6. E. annuus (L.) Pers. (DAISY F., SWEET SCABIOUS.) Stem stout, 2-16 

 dm. high, branched, beset with spreading hairs; leaves coarsely and sharply 



; the lowest ovate, tapering into a margined petiole; the upper ovate- 



GKAY'8 MANUAL 52 



