GRAMINE^E. 661 



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

 spikes 1-3, 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 6' -12' high; leaves narrow-linear, shorter 

 than the culm. Mountains of Georgia, and northward. 



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

 mostly 3, loosely 4 - 8-flowered ; perigynia thick, finely striate, oblong, with 

 a straight or slightly spreading point, shorter than the ovate long-awned 

 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 1-1^ 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. intumescens. Swamps near Home, Georgia, and north- 

 ward. 



ORDER GRAMINE^E. 



LEERSIA, Swartz. 



L. monandra, Swartz. Panicle nearly simple, exserted, spreading ; 

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

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

 Florida (Herb. Thwrber). 



PHARUS, 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. ? Floating; leaves oblong, rough beneath, longer than 

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

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

 Thurber). 



SPOROBOLUS, R. Br. 



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

 leaves narrow-linear, roughish 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 palea?, 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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