POACEAE. 17 



7. P. amarulum Hitchc. & Chase. Glabrous, glaucous: stems 8-12 dm. tall: 

 Icaf-sheaths overlapping; blades generally '.i-i) dm. long, 8-16 mm. wide, long- 

 acuminate, thick, involute, at least toward the apex: panicle large, but narrow, 

 3-7 dm. long: spikelets 4-5 mm. long, usually rather narrow, the first scale 

 about i as long as the spikelet. — Shores of Bay Biscayne. — F. K. {Bah.) 



8. P. virgatum L. Glabrous: stems erect, 9-15 dm. tall: leaf -blades elongate, 

 3 dm. long or more, 6-12 mm. wide, flat, glabrous or pubescent: panicle 1.5-5 

 dm. long, its branches widely spreading or sometimes nearly erect : spikelets 

 ovate, acuminate, 4-4.5 mm. long, glabrous. — Hammocks. — F. K. (Ber., Cuba). 



9. P. agrostoides Muhl. Stems 4-8 dm. tall, much-branched, compressed: 

 leaf -blades 3 dm. long or more, 4-8 mm. wide: panicle pyramidal, 1-3 dm. 

 long: spikelets 1.5-2 mm. long. — Everglades. — F. K. 



10. P. condensum Nash. Stems 6-10 dm. tall, branched, the lateral panicles 

 often nuich exserted: leaf -blades 2-4 dm. long, 6-S mm. wide, erect: panicle 

 dense, 1-2 dm. long, contracted: spikelets numerous, about 2 mm. long. — Ever- 

 glades. — (Bah., Cuba, Ant.) 



11. P. anceps Michx. Stems erect, 4-15 dm. tall, branched: leaf-sheaths 

 glabrous or pubescent; blades 3 dm. long or more, 4-10 mm. wide: panicle 

 1.5-3 dm. long; its branches erect to spreading: spikelets 2.5-3.5 mm. long, 

 lanceolate, acuminate. — Hammocks. 



12. P. glabrifolium Nash. Glabrous and shining: stems 1.5-4 dm. tall, erect, 

 rigid, slender, leafy: blades rigid, thickish, long-acuminate, those on the shoots 

 1.5 dm. long or less, 3-4 mm. wide, those on the flowering stems 3-9 cm. long, 

 1-3 mm. wide: panicle ovate, 4-6 cm. long: spikelets 0.7 mm. wide, obovoid. — 

 Pinelands. 



13. P. polycaulon Nash. Stems naked above, yellowish-green, 2 dm, tall or 

 less, erect: leaf -blades erect or ascending, narrowly oblong-lanceolate, 2-7 cm. 

 long, 2-S mm. wide: panicle broadly ovate, 3 cm. long or less, the main axis 

 and generally the branches pilose : spikelets 0.8 mm. wide, obovoid, obtuse. — 

 Pinelands. — (Cuba.) 



14. P. laxiflorura Lam. Stems 2-4 dm. tall: leaf-blades 6-13 cm. long, 4-10 

 mm. wide, erect : panicle .5-10 cm. long, its axis and erect or spreading branches 

 sometimes hirsute : spikelets elliptic or narrowly obovoid, strongly pubescent. 

 — Hammocks. 



15. P. neuranthum Griseb. Stems 3-6 dm. tall: primary leaves 4-6; blades 

 erect, thickish, firm, 3-10 cm. long, 2-5 mm. wide, those on the branches much 

 smaller and usually involute: panicle much-exserted, narrow, 5-8 cm. long: 

 spikelets about 1 mm. wide, turgid, with short spreading hairs. — Everglades. — 

 (Bah., Cuba, Ant.) 



16. P. fusiforme A. Hitchc. Stems 2-5 dm. tall: primary leaves usually 4 or 

 5; blades erect, linear-lanceolate, ciliate on the margin near the base, 5-12 cm. 

 long, 3-6 mm. wide, those on the branches much smaller, crowded, usually 

 involute: panicle broadly ovate, long-exserted, 6-9 cm. long: spikelets obovoid, 

 1.3-1.6 mm. broad, strongly nerved, densely pubescent with spreading hairs. — 

 Pinelands. — (Cuba.) 



17. P. Nashianum Scribn. Stems slender, 1.5-4 dm. tall: leaf -blades erect or 

 ascending, lanceolate, acuminate, 2-5 cm. long, 2-5 mm. wide, the blades on the 

 branches smaller: panicle 2.5-5 cm. long, its branches widely spreading: 

 spikelets obovoid. — Hammocks. 



18. P. Webberianum Nash. Stems 2-4 dm. tall, erect or ascending, rigid, 

 branched: blades lanceolate, 4-9 cm. long, 7-14 mm. wide, usually erect: panicle 

 ovate, 6-9 cm. long: spikelets elliptic or obovoid, 2.5 mm. long and about 1.3 

 mm. wide, the apex of the fourth scale minutely pubescent. — Hammocks. 



Flora of Miami 2 



