22 POACEAE. 



Plants without long rootstocks: leaves with elongate erect blades. 



Panicle-branches whorled : splkelets 2.5-3 mm. long. 1. 8. gracilit. 



Panicle-branches scattered: spikelets 1.5-2 mm. long. 2. S.anuustu*. 



Plants with long rootstocks : leaves with short spreading blades. 3. B. tirffinictis. 



1. 8. gracilia (Trin.) Merr. Stems tufted, 3-6 dm. tall: leaf -blades filiform, 

 the basal 1.5-3 dm. long, those on the stem few, 2.5-8 cm. long: panicle 7-18 

 cm. long, open : spikelets 2.5-3 mm. long, purple, the empty scales very unequal, 

 the flowering scale equalling the second and the obtuse palet. Pinelands. 



2. & angustus Buckl. Stems 3-12 dm. tall: leaf -blades 2-6 mm. wide, atten- 

 uate into a long slender point, the basal ones 2-3 dm. long: panicle 1-4 dm. 

 long: spikelets 1.5-2 mm. long, crowded on the short panicle-branches: second 

 scale oblong to ovate, about } the length of the spikelet. Hammocks and 

 roadsides. F. K. (Ber., Bah., Cuba, Ant.) 



2. 8. vlrglnlcus (L.) Kunth. Stems 1.5-6 dm. tall: leaf -blades 2.5-20 cm. 

 long, 4 mm. wide or less at the base, distichous, involute on the margins and at 

 the summit: panicle 2:5-8 cm. long, 4-10 mm. wide: spikelets 2-2.5 mm. long. 

 Hammocks. F. K. (Ber., Bah,, Cuba, Ant.) 



27. SPABTINA Schreb. Erect or decumbent plants with the spike-rachis 

 extending beyond the spikelets. Spikelets sessile or nearly so, much crowded and 

 imbricate. Scales 3, firm-membranous, the 2 outer keeled, Che flowering scale 

 equalling or a little longer and broader than the second scale. MARSH-GRASS. 



First scale less than % as long as the second : spikes usually few, erect or ascending. 



1. 8. juncca. 

 First scale about 94 as long as the second : spikes numerous, 



appressed. 2. 8. funciformis. 



1. 8. Juncea (Michx.) Willd. Stems often stout, 5-12 dm. tall: leaf-blades 

 1.5-6 dm. long, involute, erect or ascending: spikes 2-8, 2.5-5 cm. long: 

 spikelets 7-10 mm. long. Hammocks along Bay Biscayne. (Ber.) 



2. 8. jonciformis Engelm. & Gray. Stems rigid, often slender, 3-10 dm. tall : 

 leaf -sheaths thick, hard, the lower ones shining; blades involute, 5 dm. long or 

 less: panicle 1-2 dm. long, narrow, strict: spikelets about 7 mm. long. Ever- 

 glades. F. K. 



28. CAPBIOLA Adans. Stoloniferous plants, the stems as well as the 

 stolons often creeping. Spikelets small. Scales 3, the 2 outer persistent, thin, 

 keeled, the flowering scale membranous, broader, its keel ciliate. 



1. O. Dactylon (L.) Kuntze. Stems 1-3 dm. tall, from long creeping and 

 branching rootstocks: leaf -blades 2.5-5 cm. long, 2-4 mm. wide: spikes 1-5 cm. 

 long: spikelets 2 mm. long. Hammocks and pinelands, and cultivate.! grounds. 

 Nat from Eu., and cultivated. F. K. (Ber., Bah., Cuba, Ant.) BERMUDA 

 GRASS. 



29. EU8TACHY8 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. 



Spikes usually 4-4, rwrely more: second scale of the spikelet manifestly 2 toothed at 

 the apex : leaf blades usually 3-7 mm. wide. 1. B. petrara. 



Spikes 10-2.1 : second seal* of the spikelet truncate at the apex : leaf- 

 blades usually 1 cm. wld or more. 2. E. ptoura. 



1. E. petraea (8w.) 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 1.3-1.3 mm. long. Pinelands. F. K. (Ber., Bah., Cuba, Ant.) 



2. B. glaoca Cbapm. Steins 6-15 dm. tall: leaf -blades 2.5 dm. long or less: 

 spikes 6-15 cm. long: scales 4: second scale 1.5 mm. long, the awn about 0.3 



