344 Muhlenbergi^ia, Volume 2 



3111111. lotif::, Tuiiintcly 5 toothed, the leelli pilose externally: an- 

 thers acute: akcues (iniiiialurt*) utricular, oblong, truncate, not 

 evide :tly nerved: pappus none. 



Head of Lee canyon, Chai lesion mountains, Claik county, 

 Nevada, altitude 3300 ni., August 15, 1913, A. A. Heller iroy^. 

 Type in the herb.uiuni of the U.H\-ersily of California. Topo- 

 type in the herbarium of A. A. Heller. 



In h.abit and puljcscencc this species resembles T. poieiitil- 

 ioides Ox:^ , but differs in inipoi taut technical characters, espe- 

 cially in its non hirsute receptacle and in the narrow corollas of 

 the hermaphrodite flowers, the teeth of which are much smaller 

 and deuseh- pubescent. In floral stiucture it is more like T. di- 

 versifoIiiiDi D. C. luUon, but the inflorescence, involucre, foliage 

 and ])uhescence arc all very different. It btlongs to Nuttall's 

 genus Sphaeronieria^ reduced by Torre>- & Gray to Tanacetiim. 



Uiiiveisily of Califoniid, Berkeley, California.. 



