January 20, 1916 343 



fvCC canyon, Chaik-slon mountain?, Claik couiiU', Nevadn, 

 in limcslone at the sawmill, alliuulc 2450m., Au;.4Usl 4, 1913, 

 A. A. Heller. Tn jie in ihc lieil)aiiuni of llic University of Cal- 

 ifornia. Mer(jl\|ie in llie hfibarinm of A. A. Heller. 



This species is related lo C. K/5<?K^' (Gray) Greene, which it 

 resembles in the involucre and akene characters, but it is dccid- 

 cdl_\- diffeieiU in its lon,i;- acuminate leaves, lar^^er scattered heads, 

 short corolladobcs, etc. The foliarrc is strikinii^-K- like that of 

 certain forms of Solldaoo piiiiiila (Nntt.) T. <S: G., and the habit 

 is similar np to the inflorescence, but the floral structure is very 

 different from that of any Solidago. 



Tanacetuiii coiiipnctniii sp. nov. 



PeieniiC, caespito^um, nudique incanosericeum, 24 cm. 

 altuu,: foliis inferioribus 5-15 mm. longis, j-)innati-paititis; i-Qg- 

 nieutis 4-9, coii<;estis, ellipticoob'.onois, obtusis, 2 5 mm. lonj^ris, 

 integ-ris \'el 3lol)atip; peliolo piano; foliis superioiibus sjiaisi<, 

 plerumque pinnati pai litis inteidum integri.'-: capitulis solitariis, 

 hemisphacricis, ca. 8 mm. latis, ca. 5 mm. altis: involucri 

 squamis imbricatis, subaequalibus, oblongis, obtusis, crassis, 

 marginibus hyalini.': receptaculo conico, glabro: floribns radii 

 paucissimis, filiformibus, foeminei.'-; corolla minute 3 dentata, 

 glabra: floiibns disci numerosis, hermaphroditis; corolla cylin- 

 dracea, ca. 3 mm. longa, 5 dentata, denlibus brevissimis exlus 

 pilosib: autheiis acntis: achaeniis (immatuiis) laevis, oblongis, 

 truncatis: pappo nnllo. 



Perennial, densely caespito.se, whole plant silvery-sericeous; 

 flowering stems 2 to 4cni. high: lowei leaves 15 mm. and less. 

 long, pinnately parted; petiole flat; lobes 4 to 9, crowded, ellip- 

 tic-oblong, oblnsc, 2 to 5 mm. long, sometimes lobed; upper 

 leaves scattered, with few lobes or entire: heads solitary, terni:- 

 nating the simple erect stems; involucre broad 1 e:ni.><phenc, 

 8 mm. broad, 5 mm. high; bracts imbricated, nearly equal, ob- 

 long, obtuse, the middle portion thick and ligid, margins scar- 

 ions and tinged with pink: receptacle conic, glabrous: corolla of 

 the few female flowers filiform, irregularly and minutely 3- 

 toothed, glabrous; corolla of hermaphrodite flowers cyliudric, 



