Paspalum trinii

HABIT Annual. Culms erect; 90 cm long. Culm-internodes distally glabrous. Culm-nodes glabrous, or pubescent. Lateral branches ample; arising from lower culm. Leaf-sheaths mostly shorter than adjacent culm internode; antrorsely scabrous; pilose. Ligule an eciliate membrane; 2.5–3 mm long. Leaf-blades 17–28 cm long; 3–4 mm wide. Leaf-blade surface scabrous; pilose; sparsely hairy. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 10–12; borne along a central axis; appressed, or ascending; unilateral; 2–3.5 cm long. Central inflorescence axis 10 cm long. Rhachis angular; 0.8 mm wide; puberulous on surface; scabrous on margins; ciliate on margins (sparsely). Spikelet packing abaxial.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong, or obovate; dorsally compressed; plano-convex; obtuse; 1.9–2 mm long; falling entire.

GLUMES Glumes one the lower absent or obscure; reaching apex of florets; thinner than fertile lemma. Upper glume oblong, or obovate; 1 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface scabrous. Upper glume margins scabrous.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; 3 -veined; scabrous; scabrous on margins. Fertile lemma oblong, or obovate; 2.5 mm long; indurate; pallid; without keel. Lemma surface striate. Lemma margins involute. Lemma apex acute. Palea involute; indurate.

DISTRIBUTION South America: northern South America and Brazil.

NOTES Paniceae. Swallen 2004.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.