BLAKE.— ENCELIA AND RELATED GENERA. 377 
Key TO THE SPECIES OF SIMSIA. 
ee RN RUN ss a ay ss a asada oie Radek we A haa 22. S. sanguinea. 
A. Rays yellow or wanting. 
B ue ae silky beneath. 
O CANNES ey pe Ble vs ses 19. * ieee. 
C. es appressed-pubescent.............-.20+. S. 8 
B. Leaves densely abaentacnenca benesth: <2 22e4% rs S. Sodirot. 
S. pubescens. 
B. Leaves neither nse nor densely a beneath. 
etio sa aly nate, forming oe disk 
olucral seals  subeq UM gis ci a RS 1. S. calva. 
D. pres 3—4-seri 
Leaves pad lobed; stems glandular-setose .2. S. setosa. 
es unlobed; stems st glandular....3. S. tenuis. 
C. _Petiole-bases not connate into foliac isks. 
pom eee scales 3—4-seriate, the pee ovate. 
es glabrous and awn 
Petioles mot suriculate: ic. sss. S. exaristata. 
5. ‘s submollicoma. 
¥. Pee BUCA, oc cess 6. S. eurylepis. 
E. Achenes pubescent, 2-awned. 
F. Pales and scales purple-tipped; achene 5 mm. long. 
7. SS. lagascaeformis. 
F. Pales scarcely purple-tipped; achenes 6-7 mm. long. 
D. Scales subequal, or the outer if shorter lance-oblong. to linear- 
lanceolate. 
E. Leaves 3-lobed, the beatig narrow, sessile by a margined base; 
ncnene SG wm: tone srs ete CE 
Leaves unlobed, or “the Lone if present broad, and the 
achene 44.5 mm. -_ 
F. Achenes 6-7.3 m 
G. Leaf blade brieiite “deltoid, abruptly narrowed to a 
broadly margined clasping base; pce perc 
: a. 
G. Leaves not clasping, grayish beneath ithe yor ten 
late-based hairs; South American. .14. S. hirsuta 
15. Dombeyana 
G. Leaves ca oo. densely enwe eames both 
maicensis 
gubees Jarmieany 62625. 2524 
F. Achenes ar 3 3 (6 we 
G. Whole plant deraely pane with stalked glands. 
12. S. adenoph 
ora. 
G. Glands less 
i, pater seat, nh ty ee scarcely striate; 
sb mostly lobed, generally auricu ateclas 
; Mexican & Guatemalan... .11. S. 
H. Scale $ ag ey niin at base; heads is lange, ‘disk 
2-3 em. in diameter; Central Am 
16. ce prandifiors. 
H. —- pin yar meer heads smaller, disk 
2-1.7 om. diameter; Cent ee American. 
* ; : 17. 8S. polycephala, - 
