RYDBERG: SOME SENECIOID GENERA—II 4II 
Stem and lower surfaces of the leaves 
pi ae Mb bracts oblong- 
lancedlate!a 23 i ee eee 
hivokieneas a mm. high; bracts 5-8; heads 
5-12-flo 
Blades of ee ee leaves much longer 
than 
Achenes glabrous; leaves coriaceous, 
the ultimate lobes broadly triangular. 
Achenes pubescent; leaves scarce 
oo the ultimate lobes lanceo- 
Basal leaves not at all peltate, about 
dm. ad; involucre tubular 
Campanuinte an 
ves tomentose beneath.......... 
Biuiiee of the leaves 3-5 (rarely 7), lanceo- 
ate or ovate, approximate, attenuate, 
directed forward, entire, or with a few 
teeth, or merely denticulate, and with 
. acute sinuses. 
Divisions of t t Pp 
dulous; involucre 3-4 mm. high...... 
Divisions of the leaves lanceolate, acumin- 
ate; achenes glabrous; involucre 5-6 
igh 
mm. high, 
Divisions of the leaves 5-7, denticulate, 
i any teetht St oe a 8 
Divisions of the leaves entire or with a 
few large tee 
peeet merely p ibescunt on the m 
gins and the veins beneath; aivtiiens 
5 or 7 (except on the uppermost 
leave as a, Ce 
Lest blade 1 ees ‘Tobed or toothed, the lobing 
not extending half-way to the mid-ri 
Petioles of the basal leaves winged; pépets 
half as long as the corolla-tube.........-. 
6. O. paucicapitatum, 
7. O. sinuatum. 
8. O. Pringlet. 
9. O. Schaffneri. 
10. O. radulaefolium. 
11. O. tussilaginoides, 
26. O. chiapense. 
27. O. napeaefolium, 
28. O. jatrophoides, 
29. O. tridactylitis. 
12. O. brachycoma, 
