fcBACHYACTlS COMPOSITE 315 



EBIGERON 



into winged petioles, often ciliate: heads numerous, hemispherical, 4 lines 

 high : bracts of the involucre oblong, obtuse, herbaceous: rays a line long, 

 pinkish-purple exceeding the involucre but shorter than the pappus ; 

 achenes narrow, appressed -pubescent. Muddy saline flats and margins of 

 ponde, Washington to California, New Mexico and the Rocky mountains. 



21 ERIGERON L. Gen. n, 951. 



Herbs or rarely suffrutescent plants with entire, toothed or 

 lobed leaves and solitary, corymbose or paniculate heads of vari- 

 ous colored ray-flowere. Heads mostly hemispherical, many 

 flowered : the ray flowers very numerous and usually in more 

 than one series (sometimes wanting), pistillate those of the disk 

 tubular, perfect, or some of the exterior filiform- tubular and trun- 

 cate, pistillate. Bracts of the involucre mostly equal, narrow, in 

 a single or somewhat double series. Receptacle flat, naked, 

 punctate or scrobiculate. Appendages of the style very short 

 and obtuse. Achenes compressed, usually pubescent, commonly 

 with 2 lateral nerves. Pappus a single series of capillary scab- 

 rous bristles, rather few in number, often with minute setae inter- 

 mixed or forming an indistinct outer series, or sometimes with 

 a distinct and short squamellate-subulate or setaceous exterior 

 pappas, the inner rarely wanting in the ray. 



1 EUERIGERON DC. Gray Syn. Fl. Pt. 2, 207. Rays 

 elongated and conspicuous, or in a few species uniformly want- 

 ing, in one or two occasionally abortive : no rayless pistillate 

 flowers between the proper ray and disk. 



* Perennials, commonly dwarf, from a multicipital caudex, alpine or 

 alpestrine with comparatively large and mostly solitary heads : invol- 

 ucre loose or spreading, and copiously lanate with long inultiseptate 

 hairs. 



E. nniflorns L. Fl. Lapp. t. 9, f. 3. Stems lr-2 inches high or mo-e 

 strictly monocephalous, few-leaved, olten naked and pedunculiform at 

 summit: radical leaves spatulate or oblanceolate, 1-2 inches long: cauline 

 lanceolate to linear: involucre usually hirsute as well as lanate occasion- 

 ally becoming naked, the linear acute bracts rather close, or merely the 

 short tips spreading: rays purple or sometimes white, 2-4 lines long. In 

 Labrador to the Arctic coast and Unalaska, south to the Sierra Nevadas, 

 California and the Rocky mountains. 



E. laiiatus Hook. Fl. ii, 17, t. 121. Stems 8-10 inches high from a mul- 

 ticipital caudex, scapiform or few-leaved, monocephalous: radical leaves 

 spatulate to obovate, about half-inch long tapering into a narrowed base 

 or into a slender margined petiole ; some primary ones occasionally pal- 

 mately 3-lobed ; cauline one or two small andlaner, or hardly any: involu- 

 cre densely soft-lanate : the linear acute bracts rather close or merely the 

 short tips spreading: rays 3 lines long, white % In the Cascade mountains 

 of Washington to the northern Rocky mountains. 



E. grandiflorns Hook. Fl. ii, 18, t. 123. Stems 8-20 inches high, 

 rather stout, usually several-leaved and monacephalous : radical leaves ob- 

 ovate-spatulate* 1-3 inches long; cauline oblong to lanceolate, 4-6 lines 

 long: involucre half inch high, very woolly, its linear and attenuate-acumi- 

 nate bracts squarroses-spreading or the tips recurved : rays violet or pur- 

 ple, 4-6 lines long. Rocky mountains from British Columbia to Colorado. 



