A New Ore of Uranium. 173 
Culm 8-18 inches high, suberect, slender, triquetrous, slightly 
scabrous above, leafy towards the base, bracteate; leaves linear, 
obtusish, striate, shorter than the culm; staminate spike single, 
erect, cylindric, bearing oblong and obtuse scales ; pistillate spikes 
1-3, commonly 2-3, often approximate and the two upper nearly 
sessile, the lowest sometimes remote or very remote and pedicel- 
late and the peduncle nearly inclosed in the sheath ; stigmas three ; 
fruit ovate, triquetrous, inflated, nerved, rostrate, the beak being 
straight or at length recurved, diverging or even turned back- 
wards ; pistillate scale ovate, obtusish, half as long as the fruit ; 
whole plant yellowish-green. 
Extended widely over New England, New York, Michigan, &c. 
This plant, related to C. flava and C. ;, has long bee 
the vexation of botanists in Europe and America. 'Though it 
resembles both, and often called a variety of the former, yet it has 
several times been described as distinct, and the new name is 
much needed. It is more slender than C. flava, and differs im 
its fruit and scale, and is still further removed from C. Ocdert. 
The color is much more yellow than that of C. flava. 
Norr.—C. Halei, vol. ii, p. 248, Second Series, is C. erus- 
corvi, Shuttleworth in Kunze’s Carices, p. 128, Tab. 32, 1844, 
is also C. sicwformis, Boott, Boston Jour. Nat. Hist., 1845. 
Thad not received Kunze’s work till my paper had gone to press. 
—C. Steudelii and C. Boottit were found the last summer by 
Dr. Crawe, in Jefferson Co., N. ¥.;—both are nearly related to 
C. Willdenovia. ; 
Arr. XIX.—On Coracite, a new Ore of Uranium; by Joun 
L. Le Conre, M. D. 
of it appears to be much weathered ; the remainder is quite com- 
of lime, sulphuret of iron, and silica. Many of these are almost 
microscopic, and indeed, quite invisible, until they have been 
i this reason I 
specimens shall be obtained. As will be seen, however, by the 
experiments detailed below, the composition of this mineral is 
such that it cannot be placed with any known species. On vis- 
iting the locality next summer, I hope to obtain specimens that 
