150 PENTANDR1A, DIGYNIA. 



and yields what is known in domestic practice, under the name 

 of -worm-seed oil. A very rare plant in this neighbourhood. I 

 have once or twice met with it in the Northern Liberties near 

 fences; and in the vicinity of the Buck inn, on the Lancaster 

 road. Perennial. June, August. 



All the species of chenopodium, are probably introduced ; 

 but Mr. Elliot thinks this species a native. 



147. SALSOLA. Gen. pi. 437. {Atriplices.) 



Calix 5-parted, with a capsular base. Corol- 

 la none. Style bifid. Seed 1, horizontal, 

 cochleate, covered by the connivent calix. 

 (Fruiting calix in many species surround- 

 ed by a membranaceous dorsal margin. — 

 Nutt. 



Kan. 1. S. herbaceous decumbent, glabrous ; leaves dila- 



r 6 CaroUmana. ^ subulate ^ spmy . caHx when | n fruit flatten- 

 ed, winged. — Pers. and Mich. 



Salt-wort. 



A spinous prickly plant, of diffuse decumbent habit. Near 

 Camden; Mr. Collins. I have found it plentifully on the sandy 

 shores of Jersey, close to the Delaware, and immediately oppo- 

 site to Gloucester point. Annual. July, August. 



148. ULMUS. Gen. pi. 443. {Amentacex.) 



Calix campanulate, 4 or 5-cleft. Corolla none. 

 Samara compressed, encompassed by a 

 membranaceous alated border. [Stamina 

 sometimes 4 and also 8.) — JSTutt. 



Americana, 1. U. branches smooth, recurved,* serratures of 

 the leaves hooked, acuminate ; flowers pedicel- 

 late; fruit fimbriate. — Mich. 



Icon. Mich. Arb. forest, vol. 3. p. 269. t. 4. 



American Elm. White Elm. 



A large tree, well known by the above English name. On 

 the margins of creeks and rivers in our neighbourhood. April. 



