92 PROCEEDINGS OP THE AMERICAN ACADEMY 



++++++++ Hispidas vel hirsutissimae piJis longis pateiitibus : caules 



simplices vel superne ramosi, foliosi, spithamsei : capitula majuscula ; 



involucro hispido-hirsuto : lignite 50-60, etiam 80, longae et angustas, 



mox deflexae : pappus aperte duplex. 



E. PDMiLUS, Nutt. Gen. ii. 147. Robustior; ligulis albis ; pappo 

 exteriori e setulis (vix squamellis) brevibus setis interioris vix latioribus. 

 — Plains of Dakota to Colorado and the mountains of Utah. 



E. CONCINNDS, Torr. & Gray, Fl. ii. 174. Hirsutior ; foliis minus 

 rigidis ; caulibus stepius ramosis floribundis ; ligulis violaceis raro albis ; 

 pappo exteriori paleaceo-squamellato, paleis aut subulatis aut oblongis. 

 Var. CONDENSATUS, Eaton in Bot. King, 151; forma nana; paleis 

 pappi paucioribus latioribus. — Var, aphanactis, Gray, Proc. Am. 

 Acad. vi. 540 : ligulis abortivis vel brevissimis, vel fl. fcemineis plane 

 nullis. — Arid districts, Rocky Mountains to the Sierra and Cascades, 

 and from Brit. Columbia to Arizona. 



7. Species alpinae vel alpestres : folia latiora fere semper integer- 

 rima : involucri laxi lanosissimi pilis longissimis multiseptatis : achenia 

 ssepius binervia: ligulae ad 100 angustiusculaB : pappus fere simplex. 



E. UNIFLORUS, L. — Alpine region of the Rocky Mountains and 

 Sierra Nevada, north to the Arctic coast. 



E. GRANDiFLORCs, Hook. Fl. Bor.-Am. ii. 18, t. 123. — Alpine and 

 alpestrine regions of the Rocky Mountains. 



Var. LANATUS. Depressus, ad E. unijlorum tendens, sed involu- 

 cro squarroso-patente nee adpresso, foliis latioribus rarissime trifidis. 

 E. lanatus, Hook. 1. c. 17, t. 121. — High alpine summits. 



Var. ELATiOR, Gray, Am. Jour. Sci., ser. 2, xxxiii. 237. Caule 

 sa^pius pedali apice ramoso 2-5-cephalo folioso ; foliis aut oblongis aut 

 ovato-lanceolatis basi lata sessili. — Alpestrine, along streams in the 

 Rocky Mountains of Colorado, first collected by Dr. Parry. 



8. Species sylvaticte vel agrestes, paucte alpestres, latifoli^ : caules 

 foliosi, superne ramosi, raro raonocephali, basi nee flagelliformi nee 

 repentes : involucrum baud lanatum : ligulae plerumque violaceae vel 

 purpureae. 



* Capitula maxima (disco pollicem diametro) caules breves lignescentes 

 decumbentes terminantia : pappus fere simplicissimus : ligula3 nume- 

 rosissimae et latiusculae. 



E. GLAUcus, Ker. ; Torr. & Gray, Fl. ii. 172, ubi synon. — Sea- 

 shore of Oregon and California. 



* * Capitula majuscula, disco semi- vel §-pollicari: ligula? 100 vel 

 plures, angustae : caules erecti, 1-2-pedales : folia integerrima : pap- 



