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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.
Lycurus phalaroides
HABIT Perennial; mat forming. Culms decumbent; 4–40 cm long. Ligule an eciliate membrane; (0.3–)0.4–1.5(–2) mm long; entire; truncate. Leaf-blades conduplicate; 0.4–6 cm long; 0.4–0.7 mm wide. Leaf-blade apex obtuse; hooded.
INFLORESCENCE Inflorescence a panicle.
Panicle spiciform; linear; 1–7 cm long; 0.3–0.8 cm wide. Primary panicle branches accrescent to a central axis; with lateral stumps on axis. Panicle axis angular; scabrous; bearing deciduous spikelet clusters.
Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels fused to each other; united below; linear; unequal; 0.5–1 mm long; scaberulous.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5–4 mm long; falling entire; deciduous in a cluster with fused pedicels.
GLUMES Glumes similar; shorter than spikelet; thinner than fertile lemma. Lower glume oblong; 1–1.5 mm long; 1 length of upper glume; membranous; without keels; 2 -veined. Lower glume apex awned; 2 -awned. Lower glume awn 2–3 mm long. Upper glume oblong; 1–1.5 mm long; 0.5 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume awned; 1 -awned. Upper glume awn 2–3 mm long.
FLORETS Fertile lemma elliptic; 3.5–4 mm long; chartaceous; keeled; 3 -veined. Lemma margins ciliate; hairy below. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 2–3 mm long overall. Palea elliptic; 2 -veined. Palea keels ciliate. Palea apex acuminate.
FLOWER Anthers 3; 1.7–2 mm long.
FRUIT Caryopsis with adherent pericarp; fusiform.
DISTRIBUTION North America: Mexico. South America: Mesoamericana, western South America, and southern South America.
NOTES Eragrostideae. Sanchez & Rugolo.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.