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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Paspalum botteri
HABIT Perennial; caespitose. Rootstock evident. Culms 40–110 cm long; 1–3 mm diam. Culm-internodes hollow; distally glabrous. Culm-nodes brown; glabrous, or pubescent. Lateral branches lacking, or sparse. Leaf-sheaths keeled; hispid; with tubercle-based hairs; outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 1–1.5 mm long; brown. Collar pilose. Leaf-blade base cordate. Leaf-blades lanceolate; 17–44 cm long; 12–24 mm wide. Leaf-blade midrib conspicuous; keeled beneath. Leaf-blade surface pilose; hairy on both sides; with tubercle-based hairs.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 3–7; borne along a central axis; unilateral; 5–20 cm long. Central inflorescence axis 5–25 cm long. Rhachis narrowly winged; 1 mm wide; glabrous on margins, or ciliate on margins. Spikelet packing crowded; irregular; 4 -rowed.
Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets obovate; dorsally compressed; obtuse; 2.2–2.5 mm long; falling entire.
GLUMES Glumes one to two the lower present in some spikelets (the subsessile); shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 0.5–1.6 mm long; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume ovate; 0.8–0.9 length of spikelet; membranous; without keels; 3–5 -veined. Upper glume surface puberulous. Upper glume apex obtuse.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 3–5 -veined. Fertile lemma elliptic, or obovate; 2.2–2.4 mm long; indurate; pallid; without keel. Lemma surface striate. Lemma margins involute. Palea involute; indurate.
FLOWER Anthers 3; 0.7–1 mm long; purple.
FRUIT Caryopsis with adherent pericarp; ellipsoid; 1.2 mm long.
DISTRIBUTION North America: Mexico. South America: Mesoamericana.
NOTES Paniceae. Fl Costaric 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
