Paspalum pisinnum

HABIT Annual. Culms erect, or geniculately ascending; 15–27 cm long. Culm-internodes distally glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface. Ligule an eciliate membrane; 3 mm long. Leaf-blades 5–10 cm long; 2–3 mm wide. Leaf-blade surface scabrous; rough on both sides; glabrous; hairless except near base. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 4–7; digitate; appressed, or ascending; unilateral; 2–2.5 cm long. Central inflorescence axis 2 cm long. Rhachis angular; 0.5 mm wide; puberulous on surface; scabrous on margins. Spikelet packing abaxial.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; dorsally compressed; plano-convex; obtuse; 1.6–1.7 mm long; falling entire.

GLUMES Glumes one the lower absent or obscure; reaching apex of florets; thinner than fertile lemma. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex obtuse.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; 3 -veined; scabrous; rough on veins; obtuse. Fertile lemma elliptic; 1.6–1.7 mm long; indurate; pallid; without keel. Lemma surface striate. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Brazil.

NOTES Paniceae. Swallen 2002.

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