44 ROBINSON 
f. Achenes 4-5 mm. long; leaves (at rig ie romeal a or Pe 
hastately 1- 8-toothed on each side r bas E. patens 
4B oy 1.7-3.5 mm. long; leaves seo or anil: by 
. Leaves maniacs feather-veinec » uae oe aed Gg 
: eaves 3-nerved from a point (5-)8-17 mm. above the base . 
h. Heads A or on pega a be 3 the involucre, 
or moderately co orymbs 
4. Leaves “thickish, pratcmnanitan at oon bon 
E. inulaefolium. 
¢. gti rue ei wai puberulent and conspicu- 
miferous beneath.......... piriense. 
h. Slander tices mostly ecealtinn or exceeding the involuere 
at ma 
‘<, Involucral” ‘Seales —— or a -~ 
E. | hthalmu: 
9: Leaves s-nerved from the very base or Fi a ‘poli 1-2 mm. 
k. “He shay 7-l0-flowered..... °>4..2 50 24. Fe 
k. Heads about tp toe (or in no. 26 as sang aaa 
l. Heads in dense corymbs; leaves acute or acutish at base 
20. E. Pen vanum. 
1. Heads in loose few-headed cymes or small corymbs 
pose rge loose — bracted ante leaves 
obtuse or rounded at bas 2-20- 
. Branches of <P ger ig opps ite, regular; cymes 1 
e le 
fade: = chie = 3-7-hea ieee in very on 
aves eitiabsone a ‘subcoriaceou 
o, Leaves ovate, more or less early Srieryed from or slightly above the 
base 
p. Involucre nearly as long as the florets; heads shout 20-Bowwree 
p. ihr gy nearly as long as the florets; scales cpt obtuse; 
hea 45 -TO-Go Weed 5 5-5 acne 6 ven es cme 28. 
Dp. Bow seu nearly as ian the florets; scales oblong ae to linear, 
acuminate; heads shaok 130-flowe red 
o. Leaves linear to broadly elli tg tenis, feather-veined q- oe 
q. Prima = Dennenne eA ‘ahodousunte divaricate; leaves a nage 
GUO ving Ks Coen he oe Ve ee ee 4 ine a 
q- Wau pote ches of the wea rage — eaves 
remotely and obscurely undulate-cre bout 2 
. es sessile, densely hirsute on both ‘aie heads pyramidale. 
wered; scales linear, attenuate........-- : lea ves: cs 
r. Leaves sessile or on petioles 1-14 mm. Lone the ‘upper leaves 
“site Sago or quite glabrous at least on the u heads 
30-40-flowered; scales lance-oblong, obtusis FE. amygdali inv. 
heads about 35- 
gynoxymorphum 
Oa aa ea a a ee Oe Oe pe eee 




