ANTENNARIA --COMPOSIT Z& 327 
29 ANTENNARIA. Gertn. Fruct. & Sem. ii, 410, t. 167. 
Diecious or polygamo-divscious perennial herbs with alternate 
leaves and many-flowered heads. of inconspicuous flowers. Heads 
discoid ; the pistillate flowers with filiform truncate corolla shor- 
ter than the 2-cleft style; staminate with tubular 5-lobed corolla 
and style with undivided truncate apex. Involucre of imbrica- 
ted, scarious, persistent bracts, at least their tips white or colored. 
Receptacle flat or convex, naked. Achenes small, nearly terete 
or flattish, mostly glabrous. Pappus.a single series of capillary 
bristles, those of the fertile flowers very slender, connate at base, 
and so falling from the achene in a body; those of the sterile of- 
ten crisp, mostly thickened at the apex. 
§ 1 Bristles of the pappus of the staminate floweas hardly at 
all thickened, but minutely barbellate near the apex: achenes 
obscurely 2—3-nerved, pubescent, the short hairs with 2-lobed 
and at length biuncinate tips. Bracts of the campanulate or 
somewhat turbinate involucre brownish. 
A. dimorpha T..&G. FI. ii, 481.. Depressed, cespitose, forming dense 
matted tufts from a. few inches to a foot or more in diameter and only an 
inch or two high: the thickish rootstocks creeping: stems 1-2 inches high,. 
very leafy: leaves spatulate, attenuate below to a petiole, 6-12 lines long 
whitish-tomentose both sides: heads solitary, 3-4 lines high: bracts of the 
involucre well imbricated, the outer successively shorter and obtuse, the- 
inner acute or acuminate; of the fertile heads narrow with hyaline acum- 
inate tips: achenes oblong, pubescent: pappus of the fertile flowers copi-- 
ous, of soft and very slender bristles that are not at ail thickened upward. 
Common on dry plains east of the Cascade mountains, Brit. Columbia to- 
California and the Rocky Mountains. 
A. flagellaris Gray Proc. Am. Acad. xvii, 212 Silky-lanate: stem sol- 
itary, 6-20 lines high, from a slender rootstock: lower leaves subulate- 
from a very broad and somewhat clasping base, producing from their axils 
slender wiry stolons 2-6 inches long, with a tuft of leaves and a bud at 
their apices which root and form new piants: cauline leaves linear, 10-14 
lines long, not at all. narrowed at base: heads solitary, 3-4 lines high: 
bracts of the involucre in few ranks, but little unequal, acute or the inner 
ones shortly acuminate. On barren rocky ridges in the mountains of eas- 
tern Oregon and Washington. 
-_A. stenophylla Grayl.c. “Stems erect from a subter)anean caudex, 
slender, 4-6 inches high, without stolons, leafy, terminated by a capituli- 
form glomerule of 2-4 heads: leaves very narrowly linear or almost filiform, 
attenuate to both ends (the larger 3 inches long), silvery-woolly: heads 
barely 3 lines long: involucral bracts in both sexes broadish and obtuse, 
dark brown, or in the male the inner ones with white tips: achenes (two. 
thirds of a line long), minutely hirtellous-scabrous: female pappus scanty, 
_ only a line long: **. High hills Union Co. eastern Oregon Cusick. ” 
§ 2 Bristles of the staminate pappus stout, with clavate or 
_ «Scarious-dilated tips. 
* Not surculose by stolons, 6-12 inches high: pistillate heads nar- 
' row, cylindraceous or clavate: achenes glandular, : 
SA; Geyeri Gray P]. Fendl. 107. Pubescence appressed silky-canescent = 
stems numerous from a lignescent branched base, 3-8 inches high: leaves 
