CARDUACEAE 
1343 
ds many, racemose. Involuere campanu- 
nelform roat and mewhat shorter 
tube: lobes ovate. Am. longer than 
the filaments: appendages lanceolate. Stig- 
mas lanceolate or ovate. chene ribbed. 
eel aaa numerous, the inner clavate 
at the tip.—One 
1. B. discoidea (Ell) Greene. Stem 8-15 
dm. tall, finely hirsute: lea e abe 
4-9 D 
volueres 6-8 mm. high: c oa abo on long, white or whitish, and often 
oe tinged eee ae ‘ial of woods, “and thickets, Coastal Plain, Fla. 
o La. and Ga.—Sum 
27. SIDERANTHUS Fraser. Annual or perennial, more or less widely 
ee herbs, or shrubs. Leaves aie blades spinulose-toothed, 
ed, or pinnatifid. Heads terminating t 
S Involuere hemispherie or cam- 
panulate, many-flowered: bracts narrow, 
usually acuminate.  Ray-flowers yellow, 
several. Disk-corollas with a narrowly funnel- 
hroat a 
esc mo 
Pappus of 1-3 series i bristles —About 
20 species, American. 
1. S. megacephalus (Nash) Small Ste 
8-12 dm. tall, finely pubescent: id blades 
lanceolate to linear-elliptie, 2-7 long, 
S ved c toothed: outer braets of The involucre 10-12 mm. long, acute, cilio- 
te.—Ooastal dunes and waste places, Coastal Plain, Fla. d Tex.—Sum.-fall. 
28. ISOPAPPUS T. & G. Annual or biennial, virgate-stemmed herbs. 
Leaves alternate: blades narrow, some of them coarsely toothed. Heads in- 
open panicles. Involuere narrow: ts 
to line 
a narrowly funnelform t nd 
short tube: lobes deltoid. Anthe 
as the fila ts o ppe 
bristles.—Three species, North American. 
L IL E (Nutt.) T. & G. Stem f 
3-12 dm. tall, hispid and glandular: leaf- | 
blades linear- he to narrowly linear, 
