POACEAE 75 
2-7 cm. long: spikelets in pairs, obovate, 1.3-1.5 mm. long and about 0.8 mm. broad, the 
2 outer scales 3-nerved, densely pubescent with short glandular-tipped hairs. 
In rocky pine woods, No-name Key and Key West, Florida. Spring and summer. 
29. Paspalum Blodgéttli Chapm. Smooth and glabrous. Stems densely tufted, 
slender, 3-6 dm. tall: leaf-blades 5-15 cm. long, 3-7 mm. wide, narrowed at both ends: 
racemes erect, 2-6, 1.5-6 cm. long, slender, the rachis flat, winged, about 0.5 mm. broad, 
about j as wide as the spikelets: spikelets in pairs, 1.5-2 mm. long, about 1 mm. broad, 
elliptie to obovate, the 2 outer scales papillose-pubescent with appressed hairs, 3-nerved. 
On coral soil or shell mounds, Florida. Alsoin Cuba. Spring and fall. 
30 Paspalum Hállii Vasey & Scribn. Stems 4-10 dm. long, finally prostrate and 
rooting toward the base, the nodes pubescent: leaf-sheaths more or less hirsute on one 
margin, the exterior basal ones hirsute all over ; blades 3 dm. long or less, 1-1.5 cm. wide, 
glabrous on both surfaces: racemes 2-4, usually ascending, the lower ones 5-10 em. long : 
spikelets in pairs, broadly obovate, 2.5-3 mm. long and about 2 mm. broad, the 2 outer 
scales 3-nerved, the first scale strongly hirsute, the second one glabrous. 
In moist soil, Louisiana and Texas. Spring. 
31. Paspalum laeviglümis Scribn. Stems 5-15 dm. long, finally prostrate and 
rooting toward the base, the nodes pubescent : sheaths more or less hirsute on one margin, 
otherwise glabrous; leaf-blades 1-4 dm. long, 1-2 em. wide, glabrous on both surfaces : 
racemes 4-7, spreading or ascending, the lower ones usually 5-10 cm. long: spikelets in 
pairs, oval to broadly obovate, 2.7-3 mm. long, 1.8-2 mm. broad, glabrous, the first scale 
3-5-nerved, the second scale 5—7-nerved. 
In moist places, Tennessee to the Indian Territory, Mississippi and Texas. Summer and fall. 
32. Paspalum géminum Nash. Stems 5-7 dm. tall : leaf-sheaths compressed, keeled, 
glabrous, or the basal ones pubescent; blades erect, firm, thick, 2 dm. long or less, 6-10 
mm. wide, glabrous beneath, hirsute above near the base with long hairs : racemes about 3, 
sometimes more, spreading or ascending, 4-6 cm. long: spikelets in pairs, elliptic, 3-3.3 mm. 
long and about 2 mm. wide, glabrous, the 2 outer scales 3-nerved. 
In fields and orchards, Florida. Spring and summer. 
33. Paspalum Bosciànum Fluegge. Stems 5-12 dm. long, compressed, finally 
branched, often decumbent at the base and rooting at the lower nodes: leaf-sheaths com- 
pressed, smooth and glabrous, or the basal ones papillose-hirsute ; blades 4—30 cm. long, 
3-10 mm. wide, smooth or roughish, papillose-hirsute above near the base: racemes 2-13, 
spreading or ascending, 4-9 cm. long, the rachis straight, 2-2.5 mm. wide, broadly 
winged : spikelets in pairs and often so crowded as to appear in four rows, frequently red- 
brown, broadly obovate, 2-2.3 mm. long, 1.5-1.8 mm. broad, the 2 outer scales smooth and 
glabrous, the first 5-nerved, the second 3-nerved, the flowering scale faintly pitted in close 
longitudinal lines, deep brown at maturity. [P. purpurascens Ell. ] 
In meadows and moist places, North Carolina to Florida and Mississippi. Summer and fall. 
34. Paspalum plicàtulum Michx. Stems tufted, flattened, 4-8 dm. tall: leaf- 
sheaths compressed, smooth and glabrous ; blades usually folded, at least when dry, more 
or less long-hairy above, erect, rather stiff, 2dm. long or less, 2-5 mm. wide: racemes 
3-7, rarely fewer, spreading or ascending, 3-7 cm. long: spikelets brown at maturity, 
elliptic, 2.5-3 mm. long and about 1.8 mm. wide, the first scale 5-nerved, the lateral 
nerves approximate, more or less pubescent with appressed hairs, the second scale glabrous, 
3-nerved, the margins usually more or less transversely plicate, the third scale seal-brown 
at maturity. 
In dry, usually sandy soil, Georgia and Florida to Texas. Also in Mexico, South America and the 
West Indies. Spring to fall. 
35. Paspalum diffórme Le Conte. Stems 5-10 dm. tall, rather stout, leafy below, 
not tufted: leaf-sheaths somewhat compressed, the external basal ones, as well as some- 
times the summit of the others, papillose-hirsute ; blades erect or nearly so, commonly 
less than 1.5 dm. long, 6-10 mm. wide, flat, glabrous or hirsute above and sometimes more 
or less so below : racemes 2 or 3, ascending, short, commonly 4-6 cm. long : spikelets usu- 
ally singly disposed, or rarely some of the central ones in pairs, 3-3.5 mm. long and abont 
2.6 mm. broad, the 2 outer scales 3-nerved, glabrous. 
In low grounds, Georgia and Florida. Summer. B 
36. Paspalum altíssimum LeConte. Stems usually 5-8 dm. tall, rarely taller, slen 
der: leaf-sheaths hirsute with rather short hairs; blades short-hirsute on both surfaces, 
commonly ]ess than 2 dm. long, 3-6 mm. wide : racemes generally in pairs, 5-8 cm. long, 
ascending : spikelets usually singly disposed, sometimes in pairs, about 3.5 mm. long and 
2.5 mm. wide, the 2 outer scales glabrous, 3-nerved. 
In dry pine lands, Alabama and Mississippi. Fall. 
