COMPOSITAE (COMPOSITE .FAMILY) 



805 



beneath, all but the lowest truncate or tapering at base. Throughout the range, 

 the commonest form northw. Var. SEJUNCTUS Burgess. Similar to the pre- 

 ceding variety, but most of the stem-leaves long-petioled, broad and cordate. 

 Me. to Pa. and Wise. Var. APRICENSIS Burgess. Freely branching from near 

 the base, bearing innumerable heads. Me. to Pa. Var. IANTHINUS (Burgess) 

 Fernald. Glands minute, rarely stipitate ; leaves thin. (Including A. ianthinus, 

 violaris, multiformis, and nobilis Burgess.) Me. to Ont. and W. Va. 



3. EllASTER Gray. Bracts imbricated in various degrees, with herbaceous 

 or leaf-like summits, or the outer entirely foliaceous ; rays numerous ; pap- 

 pus simple, soft and nearly uniform (coarser and more rigid in the first 

 group); achenes flattened. 



* Bracts well imbricated, coriaceous, with short herbaceous mostly obtuse spread- 

 ing tips ; pappus of rigid bristles ; stem-leaves all sessile, none heart-shaped 

 or clasping ; heads few or when several corymbose, large and showy. 



Lowest leaves ovate or ovate-oblong, on nearly naked petioles, some rounded 

 or subcordate at base. 



7. A. Herveyi Gray. Slightly scabrous, 3-9 dm. high, the 

 summit and peduncles glandular-puberulent ; leaves roughish, 

 obscurely serrate, the upper lanceolate ; heads loosely corym- 

 bose, 1 cm. or so high ; involucre nearly hemispherical ; bracts 

 obscurely glandular, all erect, with very short or indistinct 

 green tips; rays violet, 1-1.5 cm. long. Borders of oak 

 woods, in rather moist soil, e. Mass, to 



I^JFj / \ Ct. and L.I. FIG. 924. An ambigu- 

 \ \/\y '/ $ ous species, approaching the preceding 

 V\ /i / and the next. 

 \ VJl/ \ / 

 N!K "*" "*" Budical leaves (usually absent in 



no. 11) all tapering into margined 

 petioles; involucres squarrose (hardly 

 so in no. 11) ; rootstocks slender. 

 8. A. spectdbilis Ait. Stems 3-6 dm. 

 924. A. Herveyi. high, roughish and glandular-puberulent 

 above ; leaves oblong-lanceolate or the 

 lower spatulate-oblong, obscurely serrate or the upper en- 

 tire ; heads few, hemispherical; involucre 1-1.5 cm.' high; 

 bracts glandular-puberulent and viscid, mostly with the 

 upper half herbaceous and spreading ; rays about 20, bright 

 violet, 2 cm. long. Sandy soil, Mass, to Del., near the 92 5 A spectabilis 

 t coast ; also w. N. C. Aug.-Oct. FIG. 925. 



9. A. surculdsus Michx. Stems 2.5-4 dm. high, from long 

 filiform rootstocks ; leaves entire or nearly so, rigid, lanceolate 

 or the upper linear ; heads few or solitary, as in the preceding, 

 but generally smaller, the bracts hardly glandular. Moist 

 ground, coast of N. J., and south w. Aug.-Oct. FIG. 926. 



10. A. gracilis Nutt. llqotstocks occasion- 

 ally tuberous-thickened ; stems slender, 3-4 dm. 

 high ; leaves oblong-lanceolate, entire or nearly 



ISO, small (2-5 cm. long) ; heads few or several ; 

 11 I involucre top-shaped, 6-9 mm. long, glabrous, 



VI ' not glandular nor viscid, the coriaceous whitish 



\J bracts with very short deltoid or ovate tips ; rays 



9-12, 0.5-1 cm. long. Pine barrens, N. J. to 

 U N. C., Ky., and Tenn. July-Sept. FIG. 927. 



26. A. surculosus. " A ' r * dula 4^' Ste sim P le OT , C 1 7 m - 

 bose at the summit, smooth or sparsely hairy, 



many-leaved, 3-12 dm. high ; leaves oblong-lanceolate, pointed, 



sharply serrate in the middle, very rough both sides and rugose- 927. A. gracilis. 





