GRAMINE.E. (GRASS FAMILY.) 613 



7. G. grandis, Watson. Culms tall (3 - 5 high), smooth ; leaves rough, 

 broadly linear; panicle very large, diffuse ; spikelets small (2" long), lanceo- 

 late, 4 - 8-flowered ; flowering glume entire. Swamps, Tennessee ( Gattinyer) 

 July. 



61. DIARRHENA, Raf. 



A smooth perennial grass, erect from a creeping rootstock, the simple culm 

 naked above, and ending in a simple panicle of few 3 - 5-flowered spikelets. 

 Glumes coriaceous, unequal. Florets longer than the glumes ; flowering glume 

 coriaceous, its 3 strong nerves uniting to form a stout subulate point. Stamens 

 2. Grain large, free. 



1. D. Americana, Beauv. (Festuca diandra, ^fichx.) Culms 2 -3 

 high; leaves broad and flat; spikelets 2' -3" long. Shady woods and 

 banks, Tennessee. Sept. 



62. DACTYLIS, L. ORCHARD GRASS. 



Perennial grasses, with simple culms, keeled leaves, and 2 - 7-flowered 

 spikelets crowded in a 1 -sided glomerate panicle. Glumes and flowering 

 glumes herbaceous, keeled, awn-pointed, rough-ciliate on the keel, the latter 

 5-nerved. Stamens 3. Grain free. 



1. D. glomerata, L. Around homesteads. Introduced. May- June. 

 Culms 2 -3 high. Leaves and sheaths scabrous. Spikelets in close 

 clusters at the end of the short branches, 2 - 4-flowered. Glumes and florets 

 lanceolate. 



63. EATONIA, Raf. 



Slender erect and tufted grasses, with narrow leaves, and small naked pale 

 spikelets in a racemose or spicate panicle. Spikelets rarely awned, 2-5- 

 flowered, the uppermost flower usually an awn-like pedicel. Glumes mem- 

 branaceous, shorter than the florets, the lower one linear and 1 -nerved, the 

 upper obovate, 3-nerved. Flowering glume obtuse, longer than the palet. 

 Stamens 3. Grain linear-oblong. 



1. E. Obtusata, Gray. Panicle dense, spike-like, the 2-flowered spikelets 

 much crowded on the short erect branches ; glumes rough on the back, the 

 upper one round-obovate, somewhat truncate, rather rigid; flowering glume 

 lanceolate-oblong, obtuse, rough-keeled. Dry soil, Florida, and northward. 

 April - May. % and (T) Culms 1 - 2 high. 



2. E. Pennsylvanica, Gray. Panicle slender, loose, the 2-3-flowered 

 spikelets scattered on the slender branches ; glumes slightly roughened on the 

 back, the upper one obovate, obtuse, or abruptly acute ; flowering glumes ob- 

 tuse ; leaves flat, with the sheaths smooth, rough, or downy. Upper districts. 

 April. ~U Culms 1 - 2 high. 



3. E. filiformis, Vasey. Culms 1 -2 high, 2-. 3-jointed, little exceed- 

 ing the involute-filiform radical leaves; panicle linear, loosely branched, 6'- 

 12' long; spikelets 2-flowered, the lower floret smoothish, the upper often 

 bearing a spreading awn under the apex of its glume ; sterile flower a stalked 

 glume. (K. Pennsylvanica, var., Flora.) Sandy coast, West Florida to 

 South Carolina. March. 



