AMMODIA. - .COMPOSIT 4 . 297 
ERIOCARPUM, 
PYRROCOM\. 
spatulately oblanceolate, acute, green and granular-glandular beneath a 
sparse rather stiffly hirsute pubescence, the leafy bracts subtending the 
2 or 3 subsessile heads hirsute-ciliate, as are also the small outer bracts of 
_ the tur inate involucre, the others merely granular yviscidulous: rays very 
few (about 5 to 8), deep yellow: pappus with an-outer series of short very 
narrow palee Banks of Hangman Creek, near Spokane, Washington. 
C. V. Piper.”’ 
5. AMM: DIA Nutt. 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 involticre 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. oregana 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 corym bose: 
seales of the involucre linear or lanceolate, l-nerved, the inne most as 
long as the flowers, the outermost short and appréssed : corollas all similar, 
slender, slightly dilated upwards, 5-toothed, pale yellow nearly hid in the 
pai te white pappus. On gravelly bars along streams, Washington to 
alifornia. 
6 ERIOCARPUM Nutt. Trans. Am. Phil. Soc. vii, 321. 
Perennial or annual herbs with spinulose-dentate leaves and 
(in ours) rayless heads of yellow flowers. 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 awnlike barbellate bristles. 
E. grindelioides Nutt. 1.c. Aplopappus Nuttallii T. & G. Cinereous - 
tomentose, becoming glabrate in age: stems 6-12 inches long, numerous 
from a woody caudex: Jeaves from spatulate oblong to almost lanceolate, 
rather sparsely pectinately deptate: heads few, terminating the branches, 
8-10 lines high : involucre hemispherical, its bracts rather few ranked, and 
with slightly spreading greenish tips: style appendages oblong-lanceolate. 
Idaho to the Saskatchewan, New Mexico and Arizona. 
7 PYKROCOMA Hook. FI. 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, somewhat foli- 
aceous, nerveless, oblong with more or less squarrose or herbace- 
ous tips. Receptacle flat, alveolate-toothed. Ray-flowers num- 
