Conioselimm.] UMBELLIFER^. ' 265 



Selinum Canadense. MicL Am, t\ 1. p. 155. Pursh, Fl. Am. v, I. p. 192. Nuit. Gen. Am. 

 V, 1. p. 180. — Apium bipinnatum. Walt, Carol p, 115. (fide PursL) DC, 



Hab. Mouth of the St. Lawrence, Canada. Michaux.~Of this plant, I regret to say, I know nothing. 

 Pui-sh speaks of it as having white flowers, and as inliablting- the mouths of large rivers from Canada to 

 Carol ina^ 



14. THASPIUM. Nutt. 



Calycis matgo 5-dentatus. Petala elliptica in acumen longuni inflexum altenuata. 

 Fructus a latere non contractus subellipticus. Mericarpia convexa jugis 5 alatis, alis sub- 

 ffiqualibus, valleculis striatis 1-vittatis. Commissura 2-vittata. Sem^n teres. — Herbai 

 perennes Boreali-Americanm. Involucrum nullum. Involuccllum b-phyllum l-laterale. 

 Genus a Smyrnio ei Zizia distinctlssimum, Cnidio evidcnter ex fructu affine, sed distinctum 

 calyce ^-dentato, petalis non emarginatisy involucellis trlphyllis et hahltu. DC. 



1. 71 actcBifoUum ; foliis biternati-sectis, segmentis ovalibus jequaliter dentatis, umbellis 

 subverticillatis, lateralibus sterilibus. DC. — Nutt. Gen. Am. v. 1. p. 197. De Cand. Prodr. 

 V. 4. p, 154. — Ligusticum actseifolium, Mick. Am. v. 1. p. 166. Pursli, Fl. Am. v, 1. 

 p. 193. 



Hab. Near Tadoussach, on the bunks of the St. Lawrence, Cuuada. Michaux. 



15. LIGUSTICUM. Koch. 



Calycis margo 5-dentatus vel obsoletus. Petala obovata acuta emarginata cum lacinula 

 inflexa, brevissime unguiculata. Fructus sectlone transversali subteres vel a latere paruui 

 compressus. Mericarpia jugis 5 argutis subalatis aequalibus, lateralibus marginantibus. 

 ValleculcB et commissura multivittata?. Semen subsemiteres. — Herbse plerceque perennes. 

 Folia decomposita aut ternatisecta. Involucrum varium; involucella polyphylla. Flores 



alM. DC 



1. L, Scoticum; caule simpliciusculo striate, foliis biternatis opacis, segmentis subrlioiubeo- 

 ovatis dentato-serratis, involucris lineari-lanceolatis5-T-pbyllis. DC. — Linn. Sp. PL p. 359. 

 Engl. Bot. t. 1207. Mich. Am. v. 1, p. 157. Pursh^ Fl. Am. v. \. p. 193. Torrey, FL of 

 Un. St. V. 1. p. 313. Cham, et Schkcht. in Linn^a, v, 1. p. 390. De Cand. Prodr. v. 4./?. 

 157. Hook, et Am. in Bot. of Beech. Voy. v. \. p. 115. et p. 125. 



Hab. Shores of the St. Lawrence. Michaux. Mrs. Sheppard. Labrador. Dr. Morrison. Newfound- 

 land. Miss Brenton. Mouth of the Columbia. Douglas. Observatory Inlet. Dr. Scouler. Behring's Straits. 

 Chamisso. Messrs. Lay and Collie in Capt. Beecheifs Voyage. 



16. CONIOSELINUM. Fisch. 



Calycis margo obsoletus. Petala obcordata aut obovata cum lacinula inflexa, Styli 

 demum divergentes reflexi. Fructus a dorso compress! uscul us aut convexus. Mericarpia 

 ]\\ms 5 alatis, lateralibus subduplo latioribus marginantibus. Valleculce lateralcs 3-vittatse, 

 dorsales sgepe 2-vittatse. Commissura 4-8 vittata, vittis inaequalibus. Carpophorum bipar- 

 titum. Semen liinc planum. — Herbae hiemies glabrcB. Caules ramosi fistulosi. Folia 

 bipinnatisecta, segmentis pinnatipartitis, lobis ohlongo-linearihns. Umbelhe termivolfs 

 multiradiatce, involucre nullo aut oligophyllo. Involucelli/o//t^/« 5-7 li near i-subu lata umbellm 



VOL, I. 



2 L 



