136 PENTANDRIA, DIGYNIA. 



segments acute or cuspidate. Fruit bipar- 

 tite. — Nutt. 



virgjnianum. 1. E. tall ; leaves very long, lanceolate-linear, ser- 

 rate; those of the branches with many linear- 

 divisions; involucre longer than the ovoid heads; 

 chaff 3-5 fid, capituli paniculate. — Lamarck and 

 JDelaroche. 

 E. aquaticum /8. — Willd. and Mich. 



Icon. Delaroche eryng. t. 19. (Pursh.) Pluk. 

 aim. t. 396. f. 3. 



Two or three feet high; flower-heads sky-blue. Often pro- 

 liferous. Along the shores of the Delaware and Schuylkill, in 

 situations where the tide reaches it. Common. Perennial. 

 July, August. 



128. PANAX. Gen. pi. 1604. (Aralix.) 



Flowers polygamous; umbel simple. — Calix 

 5 -toothed. Corolla of 5 petals. Berry in- 

 ferior, subcordate, 2, sometimes 3- seeded. 

 Calix in the male flower entire. — Nutt. 



qumqueio- 

 lium. 



1. P. root fusiform, leaves ternate and quinate, 

 leaflets oval, acuminate petiolate serrate. — Willd. 

 Icon. Bot. Mag. 1333. Fi. Peruv. 



Ginseng, 



The root of this plant is the celebrated Ginsejig of com- 

 merce. Plant about twelve inches high. Exceedingly rare. In 

 the shady and hilly woods above the falls of Schuylkill, west 

 side ; and there scarce. Perennial. May. 



trifoliutq. 



2. P. root suhrotund-hulbous ; leaves thrice ter- 

 nate and quinate; leaflets oblong-lanceolate, 

 suhsessile, serrate. — Willd. 

 Icon. Bot. Mag. 1334. 



A small delicate plant about six inches high, with small 

 flowers. On the banks of the Wissahickon, near rivulets, fre- 

 quent. Not often met with elsewhere. Flowers as in No. 1, 

 white. Perennial. April, May. 



