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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.
Pariana simulans
HABIT Perennial; caespitose. Culms erect; 60 cm long. Leaves cauline. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs scanty. Ligule an eciliate membrane. Leaf-blade base broadly rounded; with a brief petiole-like connection to sheath; petiole pubescent. Leaf-blades oblong; 8–12 cm long; 20–25 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate.
INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Synflorescence on a separate leafless culm. Inflorescence composed of racemes.
Racemes 1; single; erect; multilateral; 3.5–4.5 cm long; 8–10 mm wide. Rhachis fragile at the nodes; terminating in a sterile spikelet. Rhachis internodes linear.
Sexes mixed (in a cluster at each node). Spikelets subtended by an involucre. Fertile spikelets sessile; 1 in the cluster. Male spikelets pedicelled; 5 in a cluster. Involucre composed of imperfect spikelets; with pedicels forming a cup; oblong. Pedicels fused to each other; united along margins; oblong; flattened; 3 mm long; pubescent and ciliate; hairy on surface and margins; tip rectangular.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 6 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 6 mm long; 1 length of upper glume; chartaceous; 1-keeled. Lower glume apex acuminate. Upper glume lanceolate; 6 mm long; 1.2 length of adjacent fertile lemma; chartaceous; 1-keeled. Upper glume apex acuminate.
FLORETS Fertile florets female. Fertile lemma ovate; 5 mm long; coriaceous; without keel; 3 -veined. Lemma surface puberulous. Lemma apex obtuse. Palea coriaceous; without keels.
FLOWER Lodicules 3; oblong; 0.25 mm long; ciliate. Anthers 20. Filaments united in groups. Stigmas 2.
MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; ovate; 4 mm long; hairy. Male spikelet glumes 2; triangular; 2–3 mm long; awned (0.5mm). Male spikelet lemma 4 mm long; 3 -veined; with cross-veins.
DISTRIBUTION South America: Mesoamericana.
NOTES Parianeae. Tutin 1995.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
