to the Genera. ] XIX.—SYNGENESIA, 127 
§§Pappus nese is of only 1-4 bristly awns, or eup-like, 
or absent :— 
Corollas of the: Ln florets persistent on the a : 
pappus of 1-3 awns; leaves cae 
Corollas of all the florets deciduo 
tAchenes all thick, or those er ne ray-florets 3-cor- 
nered 
scales or altogether absent; leaves usually opposi 
p. 1 
Inner bracts of the involucre embracing and 
enclosing aa schenpe of the fertile ray-florets 
pappus absen 
Outer es of the isimiar . apie 
8. Siegesbeckia. 
Outer bracts of the yee rs in two opposite 
pairs, glabrous 9 ydra, 
Inner bracts of the involucre all flat :— 
omg Be ae Lenoonienis ey Coa seesiiee aes! 
fe 
’ 
absent or, if present, shortly 2- saa priv 
braéts of the involucre numerous...470. Eclipta, 
Scales of the receptacle concave or complicate, 
more or less enclosing and eee the disk- 
florets :— 
t+Achenes wingless, compressed or 4-5-cor- 
nered :—{p. 128 
Pappus united at the base into a ring or 
cup; flower-heads small or medium ; ray- 
“ florets fertile :— 
f 
% 
TF 
4 y-florets white, with small ligules ; disk- 
oe achenes with 2-5 persistent awns ; — 
opposite, at least below 471. 
Ray-florets eee re ren ge; disk- 
A + deciduous awns 5 
We 
apuengene 472. elia. 
Pappus-scales or awns free 
flower-heads large, ray-florets sterile :— 
“| Awns of the pappus deciduous or per- 
sistent, interm scales present, “seta 
tent; leaves always alternate [p. 12: 
473, peti 
