304 
ROBINSON. 
c. Heads in an open eimanial POMOC S, vas sen 53. EH. amplum. 
c. Heads in dense flat or rounded Sg eee d. 
d, Leaves gv peta t benea =. 
aves lance-oblong, 6-9 ‘in len eth; achenes 
copiously glandular on the fats as wel as the ribs 
54. E. angustifolium. 
e. Leaves lance-oblong, 3.5-6 cm. in length; achenes 
not at all glandular on the faces....... 55. EB. pomaderrifolium. 
e. Leaves ovate-oblong, 3-nerved th above the Rs 
56. E. rorulentum. 
d. Leaves glabrous beneath f. 
f. Heads 5-6-flowered; internodes 1-3 mm. lon 
leaves rarely eee 1.5 em. lon Ne bo ess Ly eS taciniafoliom 
f. Heads 12~-25-flowered; internodes 1-6 em. lon 
leaves rarely ‘ than 2 ¢ 
m. long, ihe Seen veinlets on the 
lower piitnes + rounded, not furrowe 
h. ag s lance-oblong to typically oblong, 2-3 
; inflorescence well Abois scaee the 
fo Oe a ee ea oe te E. —— 
h. meses sion! elliptic-oblong, 3-3.5 cm. wide: 
e about equalled or often surpassed 
by rte cee oe eee a ete 59. E. tinifolium. 
g. Leaves with the —— veinlets on the lower 
surface furrowed 
4, a, large, shout 1.5 dm. long, coarsely 
E. sie 
¢: — much smaller, 2-3. 7 em. long, fine 
punta nertate 6555 o ee E. ——— 
b. Heads _S0-d0-llowered Big eon elec! ae id Sr ta le ee 
a. 
ves lanceolate to ee ape 
broadest be below the the i niadiie: shrubs or more often perennial 
a Aa 5—19-flowered 
k. vee 
k. Leaves cuneate at base, 3-3.5 cm. long.........- 63. E. serratifolium. 
. Leaves rounded or cordate at base, 6-18 em. long I. 
- e noides. 
; = rg Sgr — _ mer ar the ~ ase. 65. ‘ 20 olan 
. Heads in dense flattish corym eaves on y acutis 
the. cauliné 0-12 0m: Wile... .c25. 15. asc o' . E. hylibates. 
. Heads 25-60-flowered Dn 
Leaves Dear; eieraete: 6c, 2 67. 
n. Leaves es broader, pie (except sometimes a few of the ~ 
. Trianae. 
uppe: 
0. Peticlae aes ‘short, 1-3 mm. long in the middle ~~ 
Ses ose of the lower leaves sometimes 
ong p. 
Pp. a finely eats the hairs somewhat in- 
urved or moderately spreading, attenuate, per- 
ceptibly (under a microscope) articulated, care 
. (68) 
Pedicels densel aibeanan ¢ the hairs hortzontally omit 
spreading, tipped with spherical glands......-. . E. sotar 
