AND GENERA OF PLANTS. 447 



t/^/«7e-fio\vered. Upper part of the stem almost naked, paniculate, the branchlets corymbose and 

 few-flowered. The involucrum of about two series, and slightly bracteolate. The flowers about 

 the size of those of H. Gronovii. Achenium dark brown, slender, but truncated, striate and angu- 

 lar, as usual. Pappus scabrous, brittle, yellowish-white. The radical and lower leaves are for the 

 most part repandly dentate, the teeth shallow and rather distant. 



Hieracm?n * argutum; leaves and base of the stem clothed with long deflected 

 hairs; stem smooth, paniculate, the branches divaricate, w^ith long, naked and 

 smooth pedicels; leaves oblong, or oblong-lanceolate, all incisely and sharply 

 dentate, acute, the cauline sessile and few; involucrum small, slightly bracteo- 

 late, smooth and blackish-green, of very few sepals in about two series; pappus 

 gray and scabrous; achenium brown, and truncate as usual; flowers white? 



Hab. In St. Barbara, Upper California. The only specimen I have collected is about twelve 

 to fifteen inches high. The lower leaves three to five inches long, three-quarters to an inch wide, 

 marked beneath with a strong mid-rib. The smoothness of all the upper part of the stem is re- 

 markable: the achenium rather slender, and striated, as usual. The gray colour of the pappus is 

 very peculiar. 



