Paspalum unispicatum (Scribn. & Merr.) Nash

Paspalum unispicatum (Scribn. & Merr.) Nash
Panicum unispicatum Scribn. & Merr. Bull. U. S. Dep. Agr. Agrost. 24 : 14. 1901.
A perennial with long scaly rootstocks and stolons. Stems up to 1 m. tall, glabrous, branching below, with leafless flower-bearing branches from the uppermost axil; leaf-sheaths glabrous to papillose-hirsute, ciliate ; blades up to 3 dm. long, 6-12 mm. wide, linear, long-acuminate, often ciliate, papillose-hirsute on both surfaces or rarely glabrous; raceme 1, or rarely 2, straight or curved, up to 1.5 dm. long, the rachis about 1 mm. wide, glabrous; spikelets in pairs, glabrous, 2.5-4 mm. long, 1.4-2 mm. wide, elliptic, the first scale of the lower spikelet acute, as long as the spikelet or nearly so, or sometimes short and truncate, apiculate, the corresponding scale of the upper spikelet much shorter, usually obtuse, or rarely rudimentary or wanting, the second and third scales 3-nerved, or if 5-nerved, the lateral nerves approximate and the internerves differing much in width, the fruiting scale yelloNvish, roughened with manifest papillae.
Type locality : Valley of Oaxaca, Oaxaca. Distribution : Texas ; Mexico ; Cuba.

Perennials, Terrestrial, not aquatic, Rhizomes present, Rhizome elongate, creeping, stems distant, Stems nodes swollen or brittle, Stems erect or ascending, Stems solitary, Stems terete, round in cross section, or polygonal, Stem internodes solid or spongy, Stem internodes hollow, Stems with inflorescence less than 1 m tall, Stems, culms, or scapes exceeding basal leaves, Leaves mostly cauline, Leaves conspicuously 2-ranked, distichous, Leaves sheathing at base, Leaf sheath mostl y open, or loose, Leaf sheath smooth, glabrous, Leaf sheath hairy at summit, throat, or collar, Leaf sheath and blade differentiated, Leaf blades linear, Leaf blades 2-10 mm wide, Leaf blades 1-2 cm wide, Leaf blades mostly flat, Leaf blade margins folded, involute, or conduplicate, Leaf blades mostly glabrous, Ligule present, Ligule a fringed, ciliate, or lobed membrane, Inflorescence terminal, Inflorescence solitary, with 1 spike, fascicle, glomerule, head, or cluster per stem or culm, Inflorescence a panicle with narrowly racemose or spicate branches, Inflorescence single raceme, fascicle or spike, Inflorescence branches 1-sided, Rachis dilated, flat, central axis to which spikelets are attached, Rachis angular, Flowers bisexual, Spikelets pedicellate, Spikelets dorsally compressed or terete, Inflorescence or spikelets partially hidden in leaf sheaths, subtended by spatheole, Spikelet less than 3 mm wide, Spikelets with 1 fertile floret, Spikelets with 2 florets, Spikele t with 1 fertile floret and 1-2 sterile florets, Spikelets paired at rachis nodes, Spikelets all alike and fertille, Spikelets bisexual, Spikelets disarticulating below the glumes, Spikelets secund, in rows on one side of rachis, Rachilla or pedicel glabrous, Glumes present, empty bracts, Glumes 2 clearly present, Glumes distinctly unequal, Glumes equal to or longer than adjacent lemma, Glume equal to or longer than spikelet, Glumes 3 nerved, Lemma similar in texture to glumes, Lemma 3 nerved, Lemma glabrous, Lemma apex truncate, rounded, or obtuse, Lemma awnless, Lemma straight, Palea present, well developed, Palea shorter than lemma, Stamens 3, Styles 2-fid, deeply 2-branched, Stigmas 2, Fruit - caryopsis, Caryopsis white.

Paspalum unispicatum là một loài thực vật có hoa trong họ Hòa thảo. Loài này được (Scribn. & Merr.) Nash mô tả khoa học đầu tiên năm 1912.