Revision of the Genus Scleria. 229 



(A) Inflorescence a single terminal cluster; achenium smooth 



AND EVEN, OR LONGITUDINALLY RIBBED. 



1. §. gracilis, Ell. Culms, very slender and sometimes filiform, ten to 



fourteen inches high, smooth ; leaves filiform, smooth ; bracts and scales 

 glabrous ; achenium ovate, obtusely triangular, obtuse, shining or dull, 

 distinctly longitudinally ribbed, about 1| lines long, with two pits on each 

 side of the triangular base ; perigynium none. Sketch, ii, 557; Kunth, 

 Enum., ii, 359 ; Eaton and Wright, 419 ; Steud., Syn., 175 ; Dietrich, Syn. 

 Plant., v, 254 ; Chapman, 532 ; Darby, 564; Wood, Class-book, 747 ; Bot. 

 and Flor., 368 ; Boeckeler, Linmca, xxxviii, 450 ; Grisebach, Cat. Flor. 

 Cuben., 249. 



Hypoporum gracile, Torr. , Ann. N. Y. Lye, iii, 381. 



Habitat, South Carolina and Florida to Texas. Also in Cuba 

 (Plautae Cubenses Wrightianae, No. 3420). 



2. S. Baldwinii, Steud. Culms triangular, smooth, or somewhat 

 rough above, one to three feet high ; leaves linear, smooth, or slightly 

 scabrous ; achenium ovate, dull,, smooth and even, about two lines long, 

 obscurely triangular, apiculate, destitute of pits, the base triangular, pointed ; 

 perigynium none ; bracts and scales glabrous. Syn., 175 ; Wood, Class- 

 book, 747 ; Bot. and Flor., 368 ; Boeckeler, Linnica, xxxviii, 450. 



S. diolca, LeConte. in Herb. Acad. Nat. Sci. Phila. 

 Hypoporum Baldwinii, Torr., Ann. Lye, iii, 382. 



In a specimen collected in Western Florida by Dr. Chapman, 

 and now in the Short Herbarium, Acad. Nat. Sci. Phila., there 

 is an additional lateral cluster of spikelets. 



Habitat, Florida to Texas. 



Var. coslat a, n. var. , Achenium longitudinally ribbed ; otherwise as 

 in the type. 



S. Baldwinii, Chapman, 532. 



Habitat, Georgia, Florida, Texas. 



(B) Inflorescence in terminal, or in terminal and lateral, 



MORE OR LESS PEDUNCLED CLUSTERS. 



* Achenium smooth. 



3. S. trig lomerat a, Michx. Culms triangular, 18 inches to 3 feet high, 

 scabrous or nearly smooth ; leaves broadly linear, smooth or slightly hairy, 

 roughish on the margins; sheaths smooth ; clusters near the summit of the 

 culm, with or without additional smaller pedunculate ones from the lower 



