V 



OF ARTS AND SCIENCES: MAY 13, 1873. 649 



specifically distinguish. But E. flagellare Gray 1. c. is perennial, at 

 least by its stolons, and quite distinct. 



E. ursinum Eaton, in Bot. King, 1. c, needs to be compared with 

 E. radicatum Hook. 



E. c^espitosum Nutt., a considerably leafy-stemmed species, more 

 or less canescent, with a fine and chiefly spreading roughish pubescence, 

 its leaves rather short, style-appendages extremely short and obtuse, 

 minutely hairy akenes 2-nerved, or rarely 3-nerved, and the outer 

 short pappus squamellate and conspicuous, has been more or less con- 

 founded with some other pretty well marked species, such as 



E. Nevadense. Pube tenui appressa substrigosa pi. m. cine- 

 rea; caulibus e rhizomate elongato repente adscendentibus vel erectis ; 

 fioridis scapiforrnibus vel apice nudis monocephalis 4 - 9-pollicaribus ; 

 foliis lineari-lanceolatis vel spathulato-linearibus integerrimis, imis elon- 

 gatis (2 - 6-poll.) in petiolum attenuatis, caulinis acutis, summis ad 

 bracteas subulatas diminutis ; involucri squamis asqualibus hirsutis sub- 

 glandulosisque (lin.' 4 longis) ; ligulis 25-30 latiuscule linearibus 

 albis (lin. 3-4 longis) uniseriatis ; appendicibus styli ovatis acutis 

 nunc acutissimis ; acheniis oblongis pubescentibus ad margines tantum 

 nervatis (seu radii 3-nervatis) ; pappo exteriore parco setuloso. — E. 

 ccespitosum var. grandiflorum Eaton in Bot. King, p. 153, pro parte, 

 nempe, no. 548, non Torr. & Gray. — Sierra Nevada, on the borders of 

 the State of Nevada : near Virginia City, Bloomer ; Mount Stanford, 

 etc., Bolander, Kellogg ; W. Humboldt Mountains, S. Watson. 



Var. ? ptgm^euii : foliis plerisque in caudice crasso confertis angus- 

 to-spathulato-linearibus (raro pollicaribus) ; scapis 1 -3-pollicaribus ; 

 capitulo dimidio minore ; involucro minus hirsuto ; ligulis purpureis. — 

 Above Ebbett's and at Mono Pass, California, alt. 9,500 to 10,750 

 feet, Brewer. Very likely a distinct species. 



E. argentatum. Pube brevi molli adpressissima sericeo-inca- 

 num ; caulibus e rhizomate (ut videter repente ?) erectis (spithamseis 

 ad pedalem) simplicibus apice nudo monocephalis ; foliis linearibus, 

 irnisve angusto-spathulatis in petiolum attenuatis, summis sparsis subu- 

 latis ; involucri (lin. 4 alti) squamis lineari-lanceolatis, exterioribus 

 brevioribus atque caulis canescentibus ; ligulis plus 50 latiuscule 

 linearibus albis (fere semipollicaribus) ; appendicibus styli brevissi- 

 mis obtusissimis ; acheniis (potius ovariis) crebre villosis G - 10-nervu's ; 

 pappo duplici, utroque copioso, exteriori squamellato-setoso interiore % 

 breviori. — E. ccespitosum Eaton, Bot. King, 1. c. pro parte, nempe, no. 



VOL. VITI. 82 



