Baldwin on RottholUa. 35d 



and sulphate of iron on the surface of the ground near it. A 

 stone containing a few grains of native copper was found in 

 Litchfield. 



The red oxyde of titanium occurs in Litchfield sparingly. 

 A very handsome specimen of the reticulated oxyde of titanium, 

 was picked up. It was on mica, and the mica had an evident 

 tendency towards the same form. 



BOTANY. 



-^■«-}*»^ 



Art. VL Aji Jiccoitnt of two North American Species of 

 Rottbb'llia, discovered on the Sea-coast in the State of 

 Georgia, by Dr, William Baldwin, of Philadelphia. 



Floimers in pairs, or two from each joint of the rachis, one 

 neutral. The neutral, or imperfect flowers, pedicillafe. 



RottholUa corrugata^ 



V^ULMO erecto, compresso, sulcato, glabro, ramoso : fohis 

 longis angustisque : spicis sub-compressis, nudis super uno 

 latere, solitariis et terminalibus, supremis approximatis : 

 calycis bivalvis, valva exteriori transversa corrugata et longi- 

 tudinaliter rugosa : corolla trivalvis. 



Culm erect, compressed, sulcate, smooth, ramose : leaves 

 long and narrow : spikes slightly compressed, naked on one 

 side, solitary and terminal, approximating towards the summit: 

 calyx 2-valved, the exterior valve transversely corrugate, and 

 longitudinally wrinkled : corolla 3-valved. Fid. NuttaWs 

 North American Genera, v. I. p. 84.* 



* Mr. JVuttall will excuse me for retaining my own specific name. His know- 

 ledge of this plant was derived from my Herbarium, where he found it under the 

 aatoe of tripsacvm cylindricvm, Mich ? Altbough it can hardly be the plant oi 



