547 
SYNGENESIA, #{QUALIS. 139 
, ticillated in 6’s, stem terminated with 1, more rarely 3 
pedunculated, hemispherical fowers, with the margin of 
the seed campanulate and 5-toothed. 
Sprcres. 1.8. verticillatus. Flowers pale purple. Has. 
From New Jersey to Florida. (Common in Sussex coun- 
ty, Delaware.) 
- HYMENOPAPPUS. ZL Heritier. 
Calix many-leaved, spreading: leaflets subo- 
val, coloured. Receptacle naked. Pappus pa- 
leaceous, many-leaved (5 to 8?), segments very 
short and obtuse, awnless. cae 
Herbaceous; leaves pinnatifid, alternate; lower ones 
sometimes opposite; lowers subcorymbose. : 
Speciss. 1. H. scabioseus. 2. tennifolius. Pu, Oxs. 
Biennial; root fusiform; stem erect and grooved, canes- 
cently tomentose in common with the leaves. Leaves al- 
ternate, irregularly subbipinnatifid, segments filiformly- 
linear, entire, thickish and convex. Flowers greenish- 
white, fastigiately paniculate, as in many species of Sene- 
cio; the calix scarcely spreading. Has. On gravelly hills, 
near the banks of the Missouri; common. 
The two species here enumerated appear at present to 
constitute the genus; H. anthemoides with a double pap- . 
pus, and linear decurrent leaves, ought to be separated. 
548. * POLYPTERIS. + 
Calix many-leaved, spreading; leaflets subo- 
val, coloured. Receptacle naked. Pappus palea- 
ceous, about 12-leaved; leaflets rigid and cuspi- — 
date, the length of the seed, 
Herbaceous; leaves alternate and entire; flowers corym- — 
DescaiPr. Perennial. Stem erect and terete, slightly 
scabrous, 3or4feet high, branches fastigiate, corymbose, 
Leaves all alternate, approximate, linear-lanceolate, 
shortly petiolate, entire on the margin, and on both sides 
vety scabrous; 2 to 4 inches long, and about 5 or 6 lines 
wide. Peduncles by 3’s, sometimes trichotomous, 1 to2 
te 
ous 
lany-winged.) In allusion to the « 
‘nab re pata 
er 
15 and copi- 
x 
