POACEAE. 17 



long: spikelets 2 mm. long. — Hammocks and pinelands, and cultivated grounds. 

 Nat. of Eu. — [E. K.] — {Ber., Bah., Cuha, Ant.) — Bermuda-grass. 



24. CHLORIS Sw. Usually perennial grasses, with spicate inflorescence. 

 Spikelets crowded, the raehilla prolonged beyond the flower. Scales usually 4, 

 sometimes 5, or occasionally more, the 2 lower persistent, the third scale acute. 



1. C. polydactyla (L.) Sw. Stems 5-10 dm. tall: spikes 6-25, flexuous and 

 spreading, 5-15 cm. long: spikelets about 3 mm. long: third scale about 2.25 

 mm. long, the nerves pilose, the awn 3-4 mm. long: fourth scale about 1.3 mm. 

 long, in side view obovate-elliptic, the awn 2.5-3 mm. long. — Cultivated grounds 

 and hammocks, U. keys, L. keys. — {Bali., Ant.) 



25. EUSTACHYS Desv. Erect plants with the spikes single or in pairs, 

 or 3-many and digitate. Spikelets usually 1-flowered, sessile. Scales 4, rarely 

 5, the 2 lower persistent, the remaining scales firmer than the empty scales. 



1. E. petraea (Sw.) Desv. Stems 3-11 dm. tall: leaf -blades 3 dm. long or 

 less: spikes erect, 4-11 cm. long: scales 4, the second 1.5-1.75 mm. long, the 

 awn about 0.5 mm. long: third scale about 2 mm. long, the awn short or want- 

 ing: fourth scale 1.3-1.5 mm. long. — Pinelands, hammocks, and sand-dunes, 

 U. keys, L. keys, L. S. keys. — [E. K.] — {Ber., Bah., Cuba, Ant.) 



26. ELEXJSINE Gaertn. Annual, or perennial and creeping grasses, with 

 flat leaf-blades, and an inflorescence composed of normally several spikes 

 arranged digitately or approximately with sometimes an additional 1 or 2 

 spikes below. Spikelets numerous, much crowded, imbricate, sessile, alternate 

 in 2 rows, several-flowered, the flowers perfect, or the upper ones staminate. 

 Scales several, obtuse or acute, flattened, keeled, thin, the 2 lower ones empty, 

 a little shorter than the others, the remaining scales usually more obtuse, each 

 of the lower ones enclosing a scarcely shorter compressed 2-keeled palet and a 

 flower, the terminal scales empty. 



1. E. indica (L.) Gaertn. Stems 1.5-6 dm. tall, erect or decumbent: leaf- 

 sheaths loose, overlapping, often short and crowded at the base of the stem ; 

 blades 7-30 cm. long, 2-6 mm. wide: spikes 2-10, whorled or approximate at 

 the summit of the stem, or sometimes with 1 or 2 distant ones, 2-8 cm. long: 

 spikelets 3—4 mm. long, 3-6-flowered. — Cultivated grounds and waste places, 

 L. keys. Nat. of the Old World.— [E, K.]— (Per., Bah., Cuba, ^?U.)— Wire- 

 grass. Dog-grass. Yard-grass. Crow-foot. 



27. DACTYLOCTENIUM Willd. Annual grasses, with flat leaf -blades, 

 and an inflorescence consisting of 1-sided spikes terminally arranged in pairs or 

 digitate. Spikelets numerous, crowded, imbricate, sessile, alternate in 2 rows, 

 several-flowered, the flowers perfect, or the upper ones staminate. Scales 

 several, acute or mucronate-pointed, or the second one awned, thin, flattened, 

 keeled, the 2 lower empty, the remaining scales broader, each of the lower ones 

 enclosing a scarcely shorter compressed 2-keeled palet and a flower, the upper 

 scales empty. 



1. D. aegyptium (L.) Willd. Stems 1.5-6 dm. tall, usually decumbent and 

 extensively creeping: leaf -sheaths loose, overlapping, often crowded; blades 1.5 

 dm. long or less, 2-6 mm. wide, ciliate toward the base: spikes in pairs, or 3-5 

 and digitate, 1-5 cm. long: spikelets 3-5-flowered. — Pinelands, cultivated and 

 waste grounds, L. keys. Nat. of the Old World. — [E. K.] — {Bah,, Cuba, 

 Ant.) — Egyptian-grass. 



Flora of Florida Keys 2. 



