210 COMPOSITE. Erigeron. 



involucre soft and spreading. — Proc. Acad. Philad. 1863, 64, & Proc. Am. Acad. 1. c. — 

 Colorado liuckj' Mountains, at 8,000 to 9,000 feet; first coll. by Parri/, Mall, &c. Perhaps 

 a distinct species. 

 -I— -i— Low, rarely a foot high, conspicuously hispid or hirsute with spreading bristly liairs : leaves 



entire, narrow: involucre close: rays numerous, occasionally wanting- in one species: pappus 



conq)lcuovsly double, but least so in the fir^t species. 

 4H- Sparingly branched stems sevei-al or numerous from the crown of a tap root, more or less leafy : 



heads middle-sized: disk a third to half an inch in diameter: involucre hispid: rays 50 to 8U, 



long and narrow, soon deilexed, occasionally wanting in the second species. 



"B. piiniilus, Xdtt. Radical and lower cauliue leaves from spatulate-linear to lanceolate (a 

 line or two wide) ; upper linear: rays white (4 lines long): outer pappus of short bristles 

 little or not at all thiciver than the inner ones and more or less intermixed with them. — 

 Gen. ii. 147; Torr. & Gray, Fl. ii. 174. E. hirsutiis, Pursh, Fl. ii. 742, not Lour. — Dry 

 upper plains, Dakota to Colorado, and in the Eocky Mountains, west to l^tah. 



~B. conclnnus, Toer. & Gkay. Like tiie preceding, but usually with more dense and 

 shaggy hirsuteness and less rigid leaves : stems not rarely somewhat copiously branched : 

 rays violet or blue, rarely white : outer pappus conspicuous and squamellate or paleaceous 

 (the palea; varying from subulate to oblong I). — PI. ii. 174; Eaton, Bot. King Exp. 151, 

 with var. cotidensatus, a, d^arf and condensed form with monocephalous stems, and com- 

 monly wide (but fewer) palete to the pappus. E. strir/osus, I'ar. hiKj)idi.';simus, Hook. PI. ii. 

 1 8, chiefly. Distasis 1 amrinim. Hook. & Arn. Bot. Beech. 350. — Arid regions between the 

 western slopes of the Rocky Mountains and the Sierra Nevada and Cascades, from Wyoming 

 to Xew Mexico and Brit. Columbia to Arizona. 



~ iii I Var. aphanactis, Gbat. Discoid, tlie rays being nearly destitute of lignle or want- 

 ing. — Proc. Am. Acad. vi. 540. — Colorado to Nevada and the borders of California. 



++ -H- More branched and leafy, over a span high ; with smaller heads, fewer rays, and somewhat 

 naked involucre more imbricated: anomalous Texano-New-JIexican species. 

 E. Bigelovii, Gr,.v.T. Cinereous-hispidulous, diffusely branched from the base, leafy up to 

 the sliort-pedunculate scattered heads : leaves small, spatiflate-lanceolate or upper linear 

 (less than inch long), lowest more spatulate and petioled : braits of the hemispherical involu- 

 cre rather rigid, lanceolate, acuminate, obviously of 2 or 3 lengths, the outer s]]:iringlv his- 

 pidulous: rays 40 to 50, purple or violet (3 lines long): outer jiappus of slender-subulate 



si|naniella;, about a third the length of the inner bristles. — Bot. JIox. Bound. 78. On the 



Rio Grande near Pronteras, at the borders of Texas, New Mexico, and Chihuahua, Wright, 

 B/r/e/ou\ 



B. Brandegei. A very anomalous and imperfectly known plant, green, sparsely hispidu- 

 lous-hirsute, less branched: radical leaves spatulate-linear; cauUne linear and small, or 

 upper minute- bracts of involucre short-linear, almost uaked:- rays 30 or'more, w-hite: outer 

 pappus of coriaceous squamelL-o wliich are commonly coufluent"with the scanty bristles of 

 the inner, perhaps abnormal: only one specimen seen. — Adobe plains, S. W. Colorado on 

 the borders of Xew Mexico, Draudegee. ' 



^ ^ -^ Tufted stems very short and densely leafy, bearing simple and monocephalous scapi- 



form or few-leaved flowermg stems (about a span high) : head proportionallv largo- ra^■s -'J to 



50, not very narrow, 3 or 4 lines Jong: lca\es narrowly spatulate-linear. 



B. poliospermus. Leaves hispid throughout, an inch or more long, flliform-spatnlate 



the broader summit a quarter or half a Hue wide : liead half-inch high : im-olucre of rather 



loose and slender hispidulous bracts rays about 25, blue-violet or white- akenes deii-^clv 



white-viUous. outer pappus sleuder-squaiiK Hate, fully as long as the bre:xdth of the akene 



covered by the copious white silky hairs of the hitter. -Umatilla, Oreo-.,,, IlmMl ancl 



■\^ ashtngtou Terr., m the ^Vallaw:illa region, Bn,nd,.,v,', Twe.d,,. TiescmMcs'tlie next 



B. Chrysopsidis. Hispid, als„ with some minuter pubescence : leaves spatulate-linear, an 



inch or two long, commonly a full line wide at summit: involucre radu-r hirsute : r:,vs 40 to 



50, golden yellow^ akenes barely pubescent or hirsutulous : outer pa,ipus le>s conspicuous, 



merely setulose. otherwise ^ei-y hke the preceding - a,r,„opsis iJJa, DC. Prodr , 3-^7 



K ..M..,n.s, var. lurMhs, Gr:iy, Proc Am. Acad. xu. 90.-Stonv hills and in wet el:,v 



on mountain s.des, E, Oregon and adjacent W:ishington Terr., 7<„„„/„,,, C.irk, .Y, ,-/».;, 



IIo.rdl. Must be retained in Lnguon (of which it has the involucre and style), notwith: 



