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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Paspalum campinarum

HABIT Perennial; caespitose. Rhizomes short; knotty. Butt sheaths pubescent. Culms erect, or geniculately ascending; 40–75 cm long; 6–8 -noded. Culm-internodes distally glabrous, or pubescent. Culm-nodes glabrous, or pubescent. Lateral branches lacking. Leaves cauline. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath auricles erect; 0.5–1.5 mm long. Ligule an eciliate membrane; 0.2–0.3 mm long. Leaf-blade base cordate. Leaf-blades lanceolate; 4–9.9 cm long; 9–19 mm wide. Leaf-blade venation distinct. Leaf-blade surface glabrous. Leaf-blade margins scabrous; ciliate; hairy at base.

INFLORESCENCE Inflorescence composed of racemes; terminal and axillary.

Racemes 5–25; borne along a central axis; unilateral; 1.5–6.5 cm long. Central inflorescence axis 9–12 cm long. Rhachis angular; 0.3–0.6 mm wide; with scattered hairs. Rhachis hairs 4–8 mm long. Spikelet packing 4 -rowed.

Spikelets in pairs. Fertile spikelets pedicelled. Pedicels unequal; 0.5–1 mm long; tip discoid.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; plano-convex; acute; 2.3–2.9 mm long; 1–1.2 mm wide; falling entire.

GLUMES Glumes one the lower absent or obscure; reaching apex of florets; thinner than fertile lemma. Upper glume ovate; 0.6–0.8 length of spikelet; membranous; light brown; without keels; 3 -veined. Upper glume surface pubescent. Upper glume margins ciliate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; light brown; 3 -veined; glabrous; ciliate on margins. Fertile lemma elliptic; 2.3–2.9 mm long; indurate; pallid; without keel; 5 -veined. Lemma surface striate; with distinct germination flap. Lemma margins involute. Palea involute; indurate.

FLOWER Anthers 3; 2–2.2 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION South America: Brazil.

NOTES Paniceae. Filg & Dav 1995.

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