1916] 
GREENMAN—-MONOGRAPH OF SENECIO 87 
a. Leaves thin in texture, not succulent in 
the living state. 
a. Basal leaves obovate, subrotund to 
oblong-elliptic, usually glabrous... 
Basal leaves  rotund-ovate, oblong- 
ovate to oblong- води cordate to 
abruptly narrowed at the base, gla- 
brous or glabrate. 
I. Lower leaves rotund-ovate, usually 
Xo 
2. Heads e to many. 
* Plants of Mexico. 
de segment o 
stem-leaves broader 
than long; achenes 
s 
hispidulous ........ 
tt Terminal segment of 
stem-leaves not 
broader than теді 
achenes glabrous . 
icio idus ES western United 
Sta 
..“е............. 
II. Lower Sasa ovate to oblong- 
lanceolate, KA cordate or 
abruptly narrowed at the base. 
1. Margins of lower leaves cre- 
nate- а to od T 
* Lower leaves, 
some of them, perd 
cordate. 
em T oblong- 
lanceolate ......... 
tł Basal pus ovate. 
|| Margins lower 
leaves Eg serrate 
with ineurved teeth. 
|| Margins of lower 
leaves more coarsely 
and тоге saliently 
d. 
o. Bracteoles 
broad, obtuse... 
оо. Bracteoles 
n acute . 
** Lower leaves abruptly 
cuneate at the base, not 
cordate. 
t Eastern species. 
| Upper leaves pin- 
nately divided ..... 
48. 
49. 
50. 
61. 
55. 
Зда. 
8. obovatus 
S. Cardamine 
8. cyclophyllus 
8. quebradensis 
S. Раттеш 
S. aureus 
S. Robbinsit 
S. pseudaureus 
S. pauciflorus 
var. fallax 
S. Burkei 
8. gaspensis 
