‘ | PENTANDRIA. DIGYNIA. - 5 
- A North Améri¢an genus, with the exception of a 
caulescens discovered also i in Kamschatka by the late pro- — 
fessor Pallas. 
_ t}} Flowers pentapetalous, superior, 2-seeded. 
253. ERYNGIUM. L. (Eryngo. Sea-Holly.) 
Flowers capitate. Involucrum many-leaved. 
Proper calix 5-parted, superior, persistent. Co- 
rolla of 5 petals. Receptacle foliaceous, seg- 
~ ments acute or cuspidate. Fruit bipartile. 
Herbaceous; leaves entire, digitate or pinnatifid, oftea 
spiny, almost after the manner of Carduus. Inflorescence 
irregular, mostly dichotomal. Capitulum imbricated, pro- 
ducing bracteal or minute leaves. 
Species. 1. E. virginianum. 2. virgatum. Capitilune 
whitish. 3. Satidum. 4. aquaticum. Stem rather low; 
leaves” sword-shaped, distantly margined with setose 
spines, sete frequently by pairs; involucrum shorter than 
the capitulum; segments entire or tricuspidate. Flowers ~ 
h-white. Pluk. Phyt. "1 175, #4, -S. * gracile. 
Without spines; stem slender, dichotomous: leaves with 
very few serratures, radical oblong-ovate, upon long pe- 
duncles, cauline digitate or trifid, subsessile, se 
linear-oblong; capitula solitary, lateral and terminal, upon 
long filiform peduncles; involucrum none, or similar to 
the bractes; bractes cuspidate, entire —Ops. Stem very 
‘ slender, scarcely a foot high, grooved; radical leaves ‘ded 
«With 4serratures; stem gfe py 
* eentral segments often bidentate, late 
unidentate, linear-oblong, and attenua’ 
segments of the uppermost leaves entire; 
roundish, and very small, (scarcely bigger than an ordi- 
nary grain of shot.) Har. In West ida. Dr. Re. 
Of this numerous genus there are 8 other species in. 
Mexico and South America, but Eryngium exists chiefly 
in the sou'h of Europe, Barbagy, Syria, Persia, and the 
Levant. Many of the species are submaritime, others exist _ 
in inland depressions, and a considerable persed s 
agatid wastes. 4 
254. PANAX. L. (Gin-seng.) _ 
Flowers polygamous; umbell si si 
5-toothed. Corolla of 5 petals. 
