170 PITTONIA. 



very sleader leafy stolons, these rooting at the end, some- 

 timas branching and proliferous, from a few inches to more 

 than a foot long : head 2 lines high ; rays very numerons, 

 narrow, white or pinkish: pappus double; the outer and 

 setulose bristles few and inconspicuous. 



Common at lower and middle elevations in Eocky Moun- 

 tains o£ Colorado ; often collected, and always distributed as 

 E,flagellare, with which Dr. Gray confounded it, bnt from 

 the type of which it is entirely distinct. True E. fiagellare 

 (Fendler's n. 381, from New Mexico) is a coarser larger plant, 

 cinereous-pubescent, bearing long flagelliform sterile leafy 

 branches ; but there are no stolons. There are wide differences 

 in the pubescence ; and the outer pappus in E. fagellare is 

 much stronger and more copious. Although for twenty years 

 I have known these as distinct species, only last year was I 

 enabled to determine, by an examination of Fendler's n. 3S1, 

 which would be the true E. fiagellare. It is a plant of far 

 more extended and southerly range than E. stolonifer, being as 

 common along the arid Mexican border in Texas and southern 

 New Mexico, as it is on the dry foothills of eastern Colorado. 

 Bat the new species is limited to the Colorado region, in so 

 far as I have seen, and is found only in moist gravelly or 

 grassy lands along streams, or in mountain parks. By its 

 stoloniferous growth and propagation, it comes to form 

 extensive beds of matted trailing offsets, from the midst of 

 which rise here and there the solitary scape-like peduncles. 



Aster Elmeei. Near A. scopulomm and sienomeres; the 

 crown or caudex woody, without radical leaves ; the tufted 

 stems wiry but very slender, decumbent or almost prostrate, 

 5 to 8 inches long, sparsely leafy almost up to the solitary 

 small head : leaves scattered, sparse, oblong-linear, acute, 

 somewhat falcately upturned, rather pale with a short stiffish 

 bat appressed pubescence : head | inch high ; bracts of the 

 involucre imbricated in about 2 series, linear, scabrous- 

 puberulent and apparently viscidulous : rays purplish: 



achenes sparsely setulose-hairy (not villous) : outer pappus 

 ot few unequal setute. 



