2. A. biennis Willd. —— ——» A biennial herb 30-60 om. tall with 
simple glabrous very leafy stems; leaves 5-8 om. long, prevailing] ees 
in outline, for the most part twice-pinnately dissectedgthe prlinty subdivision: 
mostly linear-oblanceolate, the secondary lobes 1-5 mn. long or merel Pees ons 
acute, spreading, both surfaces glabrous; Ske upper leaves once signet with 
entire segnents; heads numerous, borne on short lateral branchlets in irs 
Alea much exceeded by the subtendins leaves, their involucres 1-1.5 mm a. 
the bracts scarious-margined, glabrous, the re. s> : 2 4 
vellow, glabrous; achenes nos seen. : wih A ca nt lanes on LES a 
Port Hill, Epling 10503; Horse Plains, 
om, Loiberg 1590. 
Moist places. =e 
Glos A. spithamea Pursh. ————————? Low perennial herbs with elongate tap 
r 
now ——~->Uprer Priest R., 3000 ft., Epling 7553, 7512, 7586» Hore 
oots and stout branching vertical caudices, the basal leaves tufted, 10-18 om 
long, for the most part twice pinnately divided into linear eeeuents 1-2 CMe ; 
long, 1-2 m. wide, attenuate to linear petioles 8-12 em. long, the cauline 
leaves similar, shorter petioled, the uppermost sessile, once pinnate passing 
into the linear bracts all thinly silky-pubescent; stems 20-40 cm. tall thinl 
silky-pubsscent with fine hairs; heededa narrow racemes or slender ae 
T.5-2 em. broad, the branches @b—wheeh-any crect and very slender; heads 2.5-3 mm. 
in diameter. a 
(A. campestris subsp. pacifica Hallj, 
, 2 e™mMe 
Infrequent in sandy soil at low elevations. —> 
<— 
sevice SEA 
CEE A. pacifica Nutt. _—_—_———-- > Perennial herbs with stems 40-50 cm. tall, erect, 
b 
ranching in the inflorescence, the branches strongly ascending; leaves twice 
pinnately divided into lineesr segments 1-2 cm. long, 1-2 mm. wide, attenuate to 
the stem leaves similar, more shortly petioled, 
linear petioles 8-12 cm. long, 
the uppermost sessile, once pinnate,passing into the linear bracts, all pubescent 
with soft short appressed hairs but hardly silky; heede—+ panicles 5-10 cm. 
broad, with strongly ascending branches; heads 34 
———— —>(A. campestris subsp. pacifi 
Near Horse Plains, Leiberg 1580. 
325-4 mu. in diameter. —ape————> 
ca Hall, 
OMe 
a ee eee Oe ME i ntl 
