18 I^EAFLETS. 



Aug., 1903, by Mr. C. V. Piper. The plant strikingly simu- 

 lates in its whole aspect Liatris scariosa. 



Pyrrocoma sonchifoIvIA. Stem upright, less than a foot 

 high, leafy to the summit and monocephalous : basal leaves 

 3 to 5 inches long, short-petioled, the blade broadly obovate- 

 lanceolate, acute, irregularly and divaricately or even here and 

 there retrorsely dentate, the cauline oblong-lanceolate, acute, 

 sessile by a broad base, subentire, all the foliage thin, and, with 

 the stem, more or less whitened with a villous-arachnoid indu- 

 ment : involucre % inch high and as broad, hemispherical 

 inclining to broad-turbinate ; bracts in 2 series and subequal, 

 narrow, very acute, viscidly villous ; rays rather few and short. 



Said to have been derived from the Yakima region, State of 

 Washington ; collected on Canby's expedition in 1882 by 

 T. S. Brandegee. Foliage thin, curiously simulating that of 

 some cichoriaceous plants. 



Pyrrocoma Suksdorfii. A foot high or more ; stems 

 rigid, upright above a slightly decumbent base, subspicate, 

 rarely subracemose, above the middle ; lowest leaves lanceo- 

 late, cauline spatulate-lanceolate below the inflorescence, the 

 remainder lanceolate, sessile, all hard of texture, entire, almost 

 pungently acute, pale-green, under a lens very conspicuously 

 reticulate and somewhat scaberulous, the stems with scattered 



villous pubescence : involucres broadly turbinate, 72 inch high 

 and as broad ; bracts much imbricated, with white- villous tips : 

 rays somewhat numerous but small. 



Prairies of Spokane County, Washington, W. N. Suksdorf, 

 18 July, 1889, as in U. S. Herb. 



Pyrrocoma foliosa. Stems several, erect, a foot high or 

 more, notably leafy up to the heads with large sessile foliage 

 mostly sharply serrate ; basal leaves large, strongly petiolate, 

 ascending, lanceolate, acute, strongly and sometimes incisely 

 serrate, the whole of a light almost yellowish green, and, with 

 the stem, more or less softly and viscidly villous, the texture 

 thinnish rather than very firm : heads solitary or several, 

 hemispherical, from less to more than an inch in diameter 



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