POACEAE 77 
46. Paspalum Kearneyi Nash. Stems single, slender, 8-10 dm. tall, compressed : 
leaf-sheaths compressed, the external basal ones hirsute, as well as sometimes the summit 
of some of the others ; blades erect, elongated, densely hirsute on both surfaces, long- 
acuminate, the lower ones 2-3 dm. long, 4-5 mm. wide: racemes about 3, spreading, 3-4 
cm. long : spikelets broadly obovate, 2.8 mm. long and about 2 mm. wide, barely if at all 
convex on one side, light green, the 2 outer scales 3-nerved. 
In dry soil, Mississippi. Fall. 
47. Paspalum ámplum Nash. Stems tufted, stout, 1-1.5 m. tall, round or but 
little compressed : leaf-sheaths a little flattened, the outer basal ones hirsute below, the 
remainder glabrous, excepting a tuft of long hairs at the apex ; blades 2-5 dm. long, 5-10 
mm. wide, glabrous beneath, pubescent above with short appressed hairs and near the base 
with very long ones: racemes usually 6-8, erect or ascending, the lower ones commonly 
8-15 em. long: spikelets orbicular to oval, about 3 mm. long and 2.5-3 mm. wide, the 
third scale strongly roughened with conspicuous papillae. 
In wet ground, Florida to Mississippi. Summer. 
48. Paspalum Curtisiànum Steud. Stems stout, 8-10 dm. tall:  leaf-sheaths 
densely papillose-hirsute with long ascending hairs ; blades 1.5-4 dm. long, 5-7 mm. wide, 
strongly papillose-hirsute, especially above, with long hairs: racemes 5-10, finally spread- 
ing, 3-8 em. long: spikelets single or in pairs, lenticular, 2.5-3 mm. in diameter, the 
2 outer scales glabrous, 3-nerved, the third scale striately roughened with conspicuous 
papillae. 
In wet places, South Carolina to Florida and Mississippi. Summer. 
49. Paspalum Vaseyànum Scribn. Stems 1-1.5 m. tall, stout: lower leaf-sheaths 
densely papillose-hispid with ascending hairs ; blades 4 dm. long or less, 8-12 mm. wide, 
hirsute above at the very base, otherwise glabrous : racemes erect, 10-20, the lower 8-12 
em. long: spikelets in pairs, acute, 2.3-2.5 mm. long and about 1.4 mm. wide, the 2 outer 
scales 3-nerved, acute, pilose on the margins with very long hairs, the surface, especially 
that of the first scale, pubescent with shorter hairs. 
In fields, Alabama to Texas. Summer and fall. 
50. Paspalum dilatàtum Poir. Smooth and glabrous. Stems 5-17 dm. tall, some- 
what compressed : leaf-blades 3 dm. long or less, 3-12 mm. wide: racemes 5-10 cm. long, 
erect or ascending, the rachis broadly winged, 1.2-1.5 mm. wide, straight : spikelets in 
pairs, so densely crowded as to appear as if in 4 rows, 3-3.3 mm. long, 2-2.2 mm. broad, 
nearly orbicular, apiculate, much compressed dorsally, the 2 outer scales 5—7-nerved, the 
first scale ciliate on the margins with very long lax hairs, the second sparingly ciliate with 
much shorter hairs, the flowering scale white at maturity, orbicular. 
In meadows and moist places, Georgia and Florida to Louisiana. Summer and fall. 
51. Paspalum bifidum (A. Bertol.) Nash. Glaucous. Stems 7-13 dm. tall, single, 
from a stout scaly rootstock, its scales strongly appressed-hirsute: leaves mostly at the 
base of the stem ; sheaths, at least the external basal ones, papillose-hirsute ; blades 3 dm. 
long or less, generally 5-10 mm. wide, narrowed at both ends, glabrous or but sparingly 
hirsute beneath, strongly hirsute above toward the base: racemes usually 2 or 3, sometimes 
more or only 1, 7-15 cm. long, erect, the rachis triangular, slender, the lateral margins 
not winged: spikelets in rather distant pairs, oval, 3.5-4 mm. long and about 2.5 mm. 
broad ; scales usually 3 (sometimes 4 and the first one minute), the first scale 7-nerved, the 
second one 5-nerved. [P. racemulosum Nutt. ] 
In dry pine lands or on wooded hillsides, North Carolina to Florida and Louisiana. Fall. 
52. Paspalum solitarium Nash. Rootstock long and stout, scaly, the scales gla- 
brous. Stems single, rigid, 6-10 dm. tall (rarely shorter) : leaf-sheaths sometimes pubes- 
cent on the exterior margin ; blades elongated, stiff, the larger ones often 3-6 dm. long, 
involute, at least when dry, long-acuminate, glabrous: raceme 1, or rarely 2 racemes, 1-2 
dm. long, erect: spikelets crowded in pairs on hispid pedicels, glabrous, 3 mm. long and 
about 1.5 mm. wide, elliptic, the 3 outer scales 3-nerved. [P. monostachyum Vasey, not 
Walp.] 
In wet soil, southern Florida and Texas. Fall. 
53. Paspalum conjugàtum Berg. Smooth and glabrous. Stems compressed, 2-9 
dm. tall, finally decumbent at the base and rooting at the lower nodes: leaf-blades 4-16 
cm. long, 4-12 mm. wide: racemes in pairs, slender, often curved, spreading or ascending, 
5-12 em. long, the rachis straight, or flexuous toward the apex, 0.6-0.8 mm. broad : spike- 
lets crowded, much compressed dorsally, singly disposed, 1.5 mm. long, 1-1.2 mm. broad, 
apiculate, the 2 outer scales 2-nerved, the nerves marginal, the first scale ciliate on the 
margins with very long lax hairs, the third scale smooth, white. 
In wet places, Louisiana and Texas. Common in all tropical countries. Summer. 
