ANGELICA. PENTANDRIA. DIGYNIA. 317 



very well, excepting in the character ol" the universal involu- 

 crum. Cornuti's figure is too imperfect to determine the 

 question. 



214. THAPSIA. L. 

 Fruit narrow, slightly compressed, nearly ribless, 

 with 2 dorsal and marginal wings. Involiicrum 0. 

 Roem. £sf Schult, Gen. 1222^ 



T. trifoliata Mil I. : petioles and nodes of the slenrj pu- 

 bescent; leaves biternate and ternate ; leaflets c-jneate and 

 ovate, unequally and incisely serrate, entire at the base ; um- 

 bels terminal ; partial involucra 3-leaved, subulate. Willd. 

 Spec. I. p. 1465. Roem. i^ Sc/irW/. VI. p. 615. Ligus- 

 TicuM bnrhinode Mich. FL I. p. 167. Pursk FL I. p. 

 193. E lliott Sk,l. p. 35 1 .. Smyrnium harbinode Mu h L 

 Cat. p. 31. Thaspium harbinode N 7i 1 1. Gen. I. p. G15. 

 Jiooi perennial. Steiji about 3 feet high, angular and sulcate, 

 smooth, except at the nodes. Leaves smooth ; inferior ones 

 biternate ; superior ones ternate ; leaflets about an inch and a 

 half long, cuneate and entire at the base. Umbels 3 — 4, ter- 

 minal, many-rayed. Universal involucrum wauting. Calyx 

 distinctly 5-toothed. Petals yellow, with an acute indexed 

 point. Styles longer than the petals, spreading, Fruit ellip- 

 tical, compressed ; marginal ridges winged. 

 Hab. On the shady banks of the Schuylkill, near Philadelphia. 

 .Y« (tall. 



In the arrangement of the Umbelliferse in ihis work, I 

 have adopted the recent system oi S/irengcl, as elabo- 

 rated by himself in the 6th Vol. of R o enter iS)" Schul t es' 

 Sy sterna Fegetabilium. I must confess, however, that I am 

 not satisfied with his distribu^lion of the North-American spe- 

 cies of this class, and regret also that I have not the materials 

 for revising satisfactorily their generic characters. 



ORDER III. 



T R I G Y N I A. 



* Flowers superior, 

 215. Viburnum. 216. Samrucus. 



* * Flowers inferior. 

 217. Rhus. 218. Staphylea. 



215. VIBURNUM. L. 

 Calyx minute, 5-toothed, superior. Corolla 5-cleIt ; 



