GRAMINE^E. 661 



C. Meadii, Dew. Sterile spike mostly long-peduncled, slender; fertile 

 spikes l-o, oblong (4"-8" long), closely flowered; perigynia obovate, ab- 

 ruptly contracted into the entire orifice, barely longer than the oblong acute 

 broadly margined scale; culm 0-12' high; haves narrow-linear, shorter 

 than the culm. — Mountains of Georgia, and northward. 



C. oligocarpa, Schk. Sterile spike short-peduncled ; fertile spikes 

 mostly ;J, loosely 4-8-flowered ; perigynia thick, finely striate, oblong, with 

 a straight or slightly spreading point, shorter than the ovate long awne J 

 white scale ; style very short; culms 10'- 15' high ; leaves narrow-linear. — 

 North Carolina (Curtis), and northward. 



C. polymorpha, Muhl. Sterile spikes 1 or 2, short, long-peduncled ; 

 fertile spikes 1 or 2, remote, erect ; perigynia oblong-ovate, minutely granu- 

 lar, entire at the white oblique orifice, longer than the ovate, mostly obtuse, 

 brownish-purple scale; culms 1°-U° high; leaves short, erect. — Low grassy 

 meadows, North Carolina (Curtis), and northward. 



C. Grayii, Carey. Fertile spikes 2, globose, closely 15-30-flowered; 

 perigynia sparsely pubescent (in ours), reflexed ; culms tall (2°-3° high) ; 

 otherwise like C. iutumescens. — Swamps near Rome, Georgia, and north- 

 ward. 



Ouder GKAMINE^E. 



LEERSIA, Swartz. 



L. monandra, S'vartz. Panicle nearly simple, exserted, spreading ; 

 spikelets (1" long) ovate, acute, fiat, smooth ; stamen 1 ; culms (2° -3° long) 

 smooth; leaves broadly linear, rough above and along the margins. — South 

 Florida (Herb. Thurber). 



PHAEUS, P. Browne. 



Aquatic grasses, with broad flat leaves, petiole-like sheaths, and monoecious 

 flowers disposed in a simple terminal panicle. — Spikelets by pairs, unequal, 

 the smaller one pedicelled, hexandrous, the larger one pistillate, with the 

 lower palea indurated, involute. Glumes 2, thin. Style long; stigmas 2. 

 Grain linear, included. 



P. latifolia, L. 1 Floating; leaves oblong, rough beneath, longer than 

 the sheath ; lover palea of the pistillate flower pointed, downy on the back, 

 twice as long as the lanceolate glumes. — Orange Lake, Florida (Herb. 

 Thurber). 



SPOROBOLUS, P. Br. 



S. Domingensis, Swarrz. Culms branching near the base, 2° long ; 

 leaves narrow-linear, roughisli above, mostly hairy at the base ; panicle sim- 

 ple, narrow, the short spreading branches loosely whorled ; spikelets short- 

 pedicelled, smooth ; upper glume as long as the palese, twice as long as the 

 lower one ; upper palea truncate. — Wet sandy places on the Keys along the 

 Reefs of South Florida. 

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