PEI«iTANDRIA. DIGYNIA. 175 



A North American genus, with the exception of //. 

 caulescens discovered also in Kamschatka by the late pro- 

 lessor Pallas. 



UMBE1LAT.E. 



Iff Flowers pentapetalouSf siqierior, Q-seeded, 

 253. ERYNGIUM. L. (Eryngo. Gea-Holly.) 

 Flowers capitate. Involucrum inany-leaved. 

 Proper calix S-parted, superior, persistent. Co- 

 roUa of 5 petals. Receptacle foliaceous, seg- 

 ments acute or cuspidate. Fruit bipartite. 



Herbaceous; leaves entire, digitate or pinnatifid, often 

 spiny, almost after the manner of CardBus. Inflorescence 

 irregular, mostly dicholoaial, Capitulum imbricated, pro- 

 ducing bi-acteal or minute leaves. 



Species. \. E. virginianum. 2. virgatum. Capitulum 

 whitish. 3. fcetidum. 4. aguaticum. Stem rather low; 

 . leaves sword-shaped, distantly margined with setose 

 spines, setae frequently by pairs; involucrum shorter than 

 the capitulum; segments entire or tricuspidate. Flowers 

 greenish-white. Pluk. Phyt. t. 175, f. 4, 5. * graclle. 

 Without spines; stem slender, dichotomous: leaves with 

 very tew serratures, radical oblong-ovate, upon long pe- 

 duncles, cauline digitate or trifid, subsessile, segments 

 linear-oblong; capitula solitary, lateral and terminal, upon 

 long filiform peduncles; involucrum none, or similar to 

 the bractes; bractes cuspidate, entire. — Obs, Stem very 

 slender, scarcely a foot high, grooved; radical leaves often 

 with 4 serratures; stem leaves digitate orternately divided, 

 central segments often bidentaie, lateral ones entire or 

 i.nidentate, linear-oblong, and attenuated downwards; 

 segments of the uppermost leaves entire; capitulum blue, 

 roundish, and very small, (scarcely bigger than an ordi- 

 nary grain of shot.) Hab. In West Florida. Dr. Baldwyn. 

 Of this numerous genus there are 8 other species in 

 Mexico and South America, but Kryngium exisis ciiiefly 

 in the south of Europe, Barbary, Syria, Persia, and the 

 Levant. Many of the species are submaritime, others exist 

 in inland depressions, and a considei able number grow 

 on arid wastes. 



254. PANAX. L. (Gin-seng.) 



Flowers polygamous; umbell simple. — Calix 

 5-tootlied. Corolla of 5 petals. Bemj inferior. 



