ammonia. COMPOSITE 297 



ERIOCAKPUM. 

 PYRROCOM \ 



spatulately ol (lanceolate, acute, green and granular-glandular beneath a 

 sparse rather stithy hirsute pubescence, the leafy bracts subtending the 

 2 or 3 subsessile heads hirsute-ciliate, as are also the small outer bracts of 

 the tin inate involucre, the others merely granular viscidulous: rays very 

 few (about 5 to 8), deep yellow: pappus with an outer series of short very 

 narrow paleae Banks of Hangman Creek, near Spokane, Washington. 

 C V Piper." 



5. AMM >DIA Xutt. Trans. Am. Phil. Soc. n. Ser. vii 321. 



Somewhat viscid and pubescent perennials with entire leaves 

 and middle-sized heads of yellow flowers terminating the stem 

 and branches. Heads many-flowered ;■ the flowers all perfect 

 and tubular. Scales of the companulate involucre scarious- 

 membranaceous, 1 -nerved, imbricated in few series, the outermost 

 shortest, Receptacle flat, alveolate-toothed. Branches of the 

 style subulate-filiform, the appendages longer than the stigmatic 

 portion. Achenes fusiform or somewhat compressed, pubescent. 

 Pappus of copious minutely scabrous capillary bristles. 



A. oregaua Nutt. 1. c. Chrysopsis Oregana Gray. Stems a foot 

 high, many from the same root, paniculately branched. leaves 

 alternate, oblong, entire, veiny, sessile: peduncles some- 

 what glandular; heads irregularly paniculate corymbose: 

 scales of the involucre linear or lanceolate, 1-nerved, the inne most as 

 long as the flowers, the outermost short and appressed : corollas all similar, 

 slender, slightly dilated upwards, 5-toothed, pale yellow nearly hid in the 

 copious white pappus. On gravelly bars along streams, Washington to 

 California. 



6 ERIOCARPini Xutt Trans. Am. Phil. Soc. vii, 321. 



Perennial or annual herbs with <piinilose-dentate leaves and 

 (in ours) rayless heads of yellow Mowers. Heads many-flower- 

 ed: involucre hemispherical, its bracts rigid appressed-imbricate 

 with the outer successively shorter, all with abrupt and more or 

 less spreading herbaceous tips. Disk corollas narrow merely 5- 

 toothed. Achenes densely silky, mostly short and turbinate.. 

 Pappus white, of very unequal usually short and somewhat flat- 

 tened awn like barbellate bristles. 



E. griudelioides Nutt. 1. c. ApJopappus Nuttallii T..& O. Cmereous- 

 tomentose, becoming glabrate in age : stems 6-12 inches long, numerous 

 from a woody caudex: leaves from spatulate oblong to almost lanceolate, 

 rather sparsely pectinately dentate: heads few, terminating the branches, 

 8-LO lines high : involucre hemispherical, its bracts rather tew ranked, and 

 with slightly spreading greenish tips: style appendages oblongdanceolate. 

 Idaho to the Saskatchewan, New Mexico and \rizona. 



7 KYtiROCOMA HOok. Fl. 1, 306. 



Perennial rigid herbs with simple stems, coriaceous alternate 

 leaves and showy heads of yellow flowers terminal or,in the axils 

 of the upper leaves. Heads many-flowered, radiate. Bracts of 

 the hemispherical or campanulate involucre rigid, somevhat foli- 

 aceous, nerveless, oblong with more or less squarrose or herbace- 

 ous tips, lieceptacle fiat, alveolate -toothed. Ray-flowers nam- 



