around Nciv Bern, N. C. 51 



ma, var. Michx.fi. " Cane or Reed," Lawson's Carolina, p. 101. 

 " None to the northward of James River,'' Laivson, ibid., an 

 observation confirmed by Nuttall. It is with pleasure I bear 

 witness to the general accuracy of Lawson in his account of the 

 natural productions of Carolina. 



(76.) Panicum ignoratum, Kunth, enwm.=Aulaxanthus cili- 

 atus, Ell. sk. 



(77.) Poa viridis, Ell. sk., probably not different from Poa 

 pratensis, Linn. 



(78.) Rottboellia rugosa, Nutt. gen.='Rottbcel\ia corrugata, 

 Baldwin in Lill. Journ. vol. l.=Hemarthria? rugosa, Kunth, 

 e?iwra.=Tripsacum cylindricum, Michx. fi. 



Having found this species plentiful in Middle Florida, I no 

 longer doubt that it is Michaux's plant. Dr. Baldwin found it 

 near the St. Mary's, and it is somewhat singular that it has not, 

 as yet, been detected in any of the country intermediate between 

 his locality, and the neighbourhood of New Bern, where its dis- 

 covery is due to my friend George Wilson, Esq. It is also plen- 

 tiful in wet pine woods, along the Flint River road, in Georgia. 



(79.) Trisetum palustre, Torr. = Aira pallens, Ell. 



(SO.) Equisetaceae. Lindley, in the second edition of his va- 

 luable Introduction to the Nat. Syst. of Bot., places this order at 

 the end of Exogens, and next to Conifene, to which order, and 

 to Cycadece, he supposes it to be related. 



(81.) Xanthium echinatum, Murray. " Sheep-hurr." There 

 has been much confusion concerning this plant. I am indebted 

 to my distinguished friend Dr. Torrey for the following note, 

 which clears up the difficulty : 



" Xanthium echinatum, Murray (J. A.) Comm. Gott. VI. 

 (1783—1784) p. 32, t. 4, (opt.) ; Pers. Syn. 2, p. 558 ; X. Cana- 

 dense, Mill. diet. ? Hook. & Am. in bot. Beechey's Voy. 1, p. 

 148; Spreng. Syst. 3, p. 852 ; X. strumarium, Big. fl. Bost. ed. 

 2, fl. 342; Ell. sk. 2, p. 479? not of Linn. X maculatum, 

 Raf. in Sill. jour. 1, p. 151 ; X. orientate, Linn. fil. dec. 33, t. 

 17.— Gaert. de fruct. el sem. 2, p. 418, t. 164, f. 9 ; Nutt. gen. 

 2, p. 186; Torr. cat. (1. New-York, (1S19) p. 73; Muhl. cat. 

 ed. 2, p. 89; X Amerkanum Walt. fl. Car. p. 231 ; X. macro- 

 carpon, Beck, bot. N. & M. States, p. 210, not of D. C. ; X. 

 Carolinense medium, dec. Dill. hort. Elth. t. 321. 



