K<ELERiA. TRIANDRIA. DIGYNfA. 117 



the superior one pedicellate, with a short footstalk at its hase, 

 which often bears a third floret; valves in all smooth, a little 

 unequal, the superior one somewhat conduplicate, attenuated 

 absthe base, obtuse at the tip. Stamens 3 ; anthers yellow. 

 Stigmas white. Seed oblong. 

 Hab. In dry woods. June. 



/5. major*: panicle large, a little spreading ; leaves broad- 

 •IJnear, very long. 



Culm 3 feet high. Leaves nearly a foot long, 3—4 lines broad. 

 Panicle 8 — 10 inches long. 



Hab. Near Deerfield, Massachusetts. Coo Ley. This variety 

 has the habit of Cinna arundinacea in a young state. 



I refer the Aira melicoides of Mi cli au x to our K. trun- 

 rata with some doubt, as I have never found the florets in the 

 latter hairy at the base. The A. truncata of Mu hie nb erg 

 is generally considered as the A. oblusata of Mi c ha n x ; but 

 a careful examination of the latter, specimens of which I re- 

 ceived from Mr. Elliott, has convinced me that they are 

 quite distinct. In the A. obtusata, which is probably confined 

 to the southern States, the panicle is much more dense, and 

 ihe superior valve of the calyx very much rounded. 



2D. URALEPIS. A'uttall. 



Calyx 2 — 3-flowered, much shorter than the florets, 

 which are stipitate and distinct. CoroWi 2-valved ; 

 valves very unequal, distinctly villose on the margins ; 

 the inferior one tricuspidate ; the central cusp produced 

 into a short brisde ; superior valve concave on the back 

 and incurved. *Sf^f/ o;ibbous, coated. Nutt. Gen.W, 

 p. 62. Aiit^ sp. Walt, Panicle simple, racemose, 



\J. nristulata J\^utt.: lateral panicles concealed in tha 

 sheaths of the leaves; terminal ones partly exsert ; calyx 

 3-flowcred ; bristle of the corolla as long as the lateral cusps. 

 J^ utt. Gen. ]. p. 63. and U. Siipp, 



Root annual. Cuhns numerous, cespitosc, procumbent at the 

 base, about a foot high, with numerous bearded joints. Leaves 

 subulate ; the upper ones shorter than the slieaths, pungent, 

 hairy on the upper surface, fringed towards the base with a 

 few long hairs. Sti/iule a bearded ring. Florjcra in racemes, 

 or in a very simple panicle. S/iikelct!} terete, many times 

 shorter than the calyx ; generally 3-flowercd, sometimes with a 

 fourth, abortive floret. Ghanes lacerate :n the lip. Valves of 

 the corolla clothed on the margin with a very conspiciious 

 villus ; inferior valve truncate and 3-cleft, the intermediate 

 segment mucronate, or terminated with a very short bristle : 

 superior valve ovate, half the length of the inferior. Stamens 3 , 



