nGusTicuM. PENTANDRIA. DIGYNIA. 313 



bic-ovate, coarsely serrate ; involucrum linear-lanceolate. 

 PVilld. Spec. I. p. 1424. Smith FL Brit. I. p. 309. 

 Eng. Bot. t. 1207. Pursh FL I. p. 166. Mich. FU I. 

 p. 193. Roem. kSchult. VI. p. 547. 



HoQt perennial. Sferii a foot and a half high, smooth and striate. 

 .Leaves rather fleshy ; leaflets incisely serrate, smooth, reticu- 

 lately veined beneath. Umbels terminal, on long peduncles ; 

 primary and secondary rays numerous. Involucra 3 — 4-leaved ; 

 leaflets linear-lanceolate. Calyx 5-toothed. Petals small, 

 white, inflexed. Styles short, spreading. Fruit large, oblong, 

 tumid; ribs acute and slightly winged. 



Hab. Borders of salt marshes. Near Salem, Sec, Massachu- 

 setts. Big t toil) and Oaks, On the sea-coast of Maine. 

 Z. e Conte. July. 



This plant resembles the European in every respect. 



2. L. actmfolium M i c h. : leaves biternate ; leaflets 

 oval, equally toothed; partial involucra setaceous ; fruit ob- 

 long-oval ; ribs somewhat winged. Mich. FL I. p. 166, 

 Pursh FU. p. 193. Roem. <^ Schult. VI. p. 555. 

 Thaspium aQtiZifolium Nutt, Gen. I. p. 197. 



Hoot perennial. Stem very tall, smooth and striate. Lower 

 leaves triternate, petioles of the primary divisions very long; 

 leaflets ovate, coarsely toothed, about 2 inches long ; upper- 

 most leaves ternate, with the leaflets nearly entire. Umbels 

 numerous, terminal, subvenicillate ; the lateral ones sterile. 

 Fruit with sligtuly winged and somewhat undulate ribs. 



Hab In New-York. Muhlenberg. 



The largest North- American species, first discovered by Mi- 

 ch aux on the banks of the St. Lawrence. It has been found 

 in abundance about Salem, North-Carolina, by Mr. Sc hnoei- 

 nit z. In Muhlenberg's Catalogue it stands as a doubt- 

 ful species to be compared with Cicuta maculata, to which, 

 however, it bears not the least resemblance. 



211. HERACLEUM. L. 



Fruit compressed, with a membranaceous margin ; 

 W/>>5 3, dorsal, obtuse; intervals and comtnissure with 

 clavate spots. Flowers subradiant. Involucrum 0. 

 Bo em. 'd' Schult. Gen. 1216. 



H. lanatum Mich. : leaves ternate, petiolate, tomen- 

 tose beneath; leaflets petioled, round-cordate, lobed ; fruit 

 Orbicular. Mich. FL I. p. 166. Pursh FL \. p. 181. 

 B ig. Bost. p. 67. Roem. k Schul t. VI. p. 580. 



Root perennial. Stem 3 — 5 feet high, thick, sulcate, pubescent. 

 Common petiole very broad and membranaceous; leaflets 

 5 — 6 inches long, somewhat palmately lobed, smooth above ; 

 40 



