SUNFLOWER FAMILY 345 
Heads disciform, the fig en iris present but essentially rayless. 
Bie gos southern Calif 
pappus about “ 12 Aaiite bristles; gen encmery 2~3 mm. 
divergen 
ong. 32.28. 
Inner fon about 15-20 firm pore lish corollas 4-5 mm. 
best babe 
Oute bese P ‘ adaak scales; stem often leafy, subnaked 
iefly in forms from southern California; southeastern 
Or fegeai to southern California ae eastward. 
te: erate 
Outer Lia setose and o or ng; stem naked; 
rthern Nevada fe Caliterain. pin As Be sr 
Washington. 35. E. chrysopsidis. 
Rays yellow 
Pu iemcenie of the stem spreading throughout; leaves narrowly oblance- 
olate, str. a Hes or slightly Bibles scarcely Seenene; stem sub- 
naked, the leaves all or nearly all in a basal cluster; extreme 
southeastern Washington to northern California and Nevada. 
hoe & stdts, 
Pubescence of the stem mostly appressed, at least above; leaves linear, 
fle eXUOUS; stem ee e. less leafy, at least below the middle; 
t scade unta 
. E. piperianus, 
Basal leaves more or less strongly triple-nerved. 
Involucre more or less spre rps. hirsute as well as | ons —_— t 10-25, 
or none; cautnab rn Califor . &. lass 
TInvolucre canescent with fine vatitte hairs (sometimes sae wed ‘Siikeaticaes also 
glandular, but i ao color ae about 30-100, 
Basal leaves ac phyl only slightly or obscurely thickened on the 
back; eae cider pi ish en She biak: pot of oe -- scade Moun- 
tains from Oregon to southern British Columbia and eastward. 
ee cor i OSUS. 
Basal Sete usually rounded or obtuse at the tip; yin es evidently thick- 
ned on the bac ik stem rarely purplish at ing e hase: eacenns eastern 
espitos 
phomty sinc a. = stem and leaves more or less closely appressed or weer never easels 
fends ieee: the flowers all tubular and perfect; widespread. 
37. E. bloomeri. 
Heads evidently radiate. 
ase of the stem conspicuously enlarged, shining, and somewhat indurated, straw- 
colored or purplis 
Rays yellow; pa nptis-heteties 10-20: widespread. 38. E. linearis. 
Rays sin purple, or pink; barigna -bristles mostly 20-50. 
Lea ges: > e or less; involucre 3.5-5 mm. high: disk 6-11 mm. 
> pappus- bristles 20- 30; a os . Hanser og Modoc, 
n x peels n Cou s, Califor tulus. 
Leaves oblanceolate, a pony 5-5 m ; invo ree ce 5. 5 9 mm 
nee — 13-18 mm. wie Bah Jpristles | “rosy 30-40, sometimes 
n County to Fresno "County, Califor: 
40. 7: barbellulatus. 
Base * lg stem not conspicuously enlarged, shining, and indurated (alpine specimens 
E. peregrinus would be sought here, except for the 4—7-nerved achenes). 
ges narrrow. linear or rather ngage So aaa the blade if distin- 
guishable tapering very gradually to the 
Basal leaves with their bases neither eee nor of different texture from 
the blade = leaves linear or linear- filiform; stem more = geod sal 
toward the base than above; southern Briti = Colum t erra 
County, Cilifacnia and eastward. E. filtfoli eM 
Basal =i de aan their bases co: aca SS . en whaseel, shilicntoms or 
rated, of different texture — the blades; leaves linear or more 
cho oblanceolate; stem not more densely hairy toward the base than 
above. 
Plants neither ee a nor scapose; basal leaves mostly triple- 
BE, flexruosus, 
Disk- lores mostly 5-7 m long; s ein Aare aes mostly 0.3- 
m. a lak! pappus . coaree and copious, the inner of 25-40 
bristles; . involucre 7.5-10 m am gh; eastern C: ne to 
Disk- corllas ae 25-5 long; style-appendages vi 1-0.25 
ong; pappus edletivety scanty “gas fragile, the inner of 
atts bristles dees mii 3.5-8 mm. high. 
or te pos mostly abruptly rete ed and smaller than the 
: ee ones; rays ches white; east of the Cascade and 
a Nevada summits excent in northern California. 
. E, eatonii. 
caine a only gradually ‘cies, rays mostly colored; 
iefly west of the Cascade summits. 
ae leaves more or less evidently triple-nerved; heads 
few or —- and romana or less naked- -pe- 
ee ns Ps ray ostly 20-5053 volucre hairy but 
poneey. pancslag.” tad in Californ nia forms mostly 
6-8 mm. high; western vor and northern Cali- 
ep . E. decumbens. 
Basal — only obscurely if “se ‘all t triple-nerved; heads 
ral or rather numerous on leaty branches: rays 
eaouty 12-20; involucre gl — as well ba Sairy, 
4-5 mm. high; Trinity aor ‘aliforn 
E. fle -TUOSUS. 
