cowosxTAJo (composite, family) 629 



segments short, entire, or the lateral often 2-lohed; scapes nearly jiakpd; 

 rays twice the length of the very hirsute involucre: achenes minutely ihajry; 

 pappus hispid-scabrous, as long as the corolla of the disk. {E. flabelli/oli:u.i 

 Rydb. Bull. Torr. Bot. Club 26: 545. 1899.)— Cplprado and Utah tp Mon- 

 tana, and Idaho. 1 ' i ' , 



29a. Erigeron trifidus discoideus A. Nels. Rayless form of the species, 

 and sometimes glabrate.^^Same range. 



30. Erigeron pinnatisectus (Gray) A. Nels. I. c. 26:,, 246. 1899. From 

 cinereous-nirsute_to glabrate,, somewhat tufted, the Ta.ti?.et, iew stemp mostly 

 €irect, 1-2 dm. high: leaves petioled, the blade pinnately, divided intOi9-ll 

 linear and entire or more or less cleft lobes:, heads rather large (8-10 mm. nigh) 

 or in depauperate specimens small: the rays purple or viplet-purple, numerous, 

 8-1,4 pun., long. ,£. compositus pinTiatisectus.—MpsiXy high alpine; in , the 

 mountains of our range. , ,,i i , , 



,. 3L Erigeron ramosus (Walt.) B. S. P. Prel. Cat. ,N. Y. 27. 1788. Annual, 

 wjl^h somewhat appressed pubescence; the stem,, erect, 3-6 dm. high, corym- 

 bpsely branched: stem, leaves linear-oblong or. linear-lanceolate, mo^t of them 

 entire; basal and lowest Cauline spatulate or oblong, usually serrate: bracts of 

 the involucre glabrous or .nearly so: pappus double; the inner a series of, slen- 

 , dey, fragile, deqiduous bristles (often wanting in the ray-flowers) ; the outer a 

 persistent series of short, partly united, slender scales: rays white,, rarely 

 purplish, occasionally minute or wanting. E. strigosus. E.. annuus L. is 

 quite similar but taller and with more spreading pubescence and smaller 

 heads. — Neither are indigenous to, bur range, but the former occurs in many 

 fields and the latter will no doubt be found sooner or later. Both are known 

 as Daisy Fleabane. , 



32. Erigeron divergens T. & G. Fl, 2: 175. 1841, Stems several or nu- 

 merous, ascending,^ from a stout taproot, sometimes decumbent at base,; her- 

 bage roughened vith a short hispid pubescence: leaves linear, i. 1-2 cm. long, 

 or the lower; somewhat , longer and hnear-spatulate, the uppermost reduced: 

 heads solitary, terminating slender peduncles: rays numerous, filiform, 6 mm. 

 long, violet or purpUsh [or white (?)]: inner pappus of scanjty slender bristles, 

 the. outer of much shorter subulate squamellae. — ^Prom Texas to Montana 

 and T/est to the Pacific. 



32a. Erigeron divergens arenarius (Greene) A. Nels.- , Freely, slenderly, 

 and diffusely branched: leaves small and numerous;. rays pale (lavender): 

 the.- pappus apparently simple. {E. arenarius. Greene, Bull. Tprr. Bot. Club 

 25: lil. l898.-)-^Thpough the southern part of .ovu- range to Arizona. 



326. Erigeron divergens nudiflorus (Buckley); A. Nels. Branches rather 

 few and suberect, densely leafy for. two thirds of their length a,nd terminating 

 in a rather stout naked peduncle: leaves linear-spatulate, i densely cinereous- 

 hirsute. {E. 7ii«fi^on<s Buckley,! Proc. -Acad. Sci. Phila. ,456. 1862; E. 

 pedunmilaia Heller.) — Colorado to, Arizona. The varieties as well as the 

 species are probably biennial. Intermediateforms are common., i , 



33. Erigeron colo-mexicaiius A. Nels. Stems few to several from a slender 

 annual taproot, ascending, naked-peduncuJiform above the middle,, very 

 leafy, flowering when very short, the later heads on stejns 7rl5 cm. long: 

 leaves mostly linear-spatulate to linear, the basal sometimes i,cjhlanceplate 

 and 3-lobed at apex, all softly cinereous-pubescent; heads, much as. in E. 

 divergens. (E. cinereiis Gray, PI. Fendl. 68. 1848; not[E, cfnereus.'H.. & A. 

 Comp. Bot. Mag. 2: 50. 1836.)— Southern Colorado and , New Mexico, jiu: 



34. Erigeron flagellaris Gray, Mem. Am. Acad. 4: 68. 1849. More or less 

 cinereous with appressed pubescence; stems slender, d,iffusely decumbent and 

 flagellif orm but leafy, some prostrate, some at length rooting at the apex and 



Eroliferous; leaves small, entire; radical spatulate and petiole,d; those of [the 

 ranches becoming linear: solitary peduncles 4-10 cm. long: rays white or 

 purplish: pappus double, the outer of subulate bristles. (2?. MacDougallii 

 Heller, Bull. Torr. Bot. Club 26: 699. 1899;)— Moist soil; from Montana, to 

 New Mexico and Texas. 



35. Erigeron philadelphicus L. Sp. PI. 863. 1753. Perennial by stolpns 



