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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 ulei
HABIT Perennial. Culms erect; 30–50 cm long. Leaves cauline. Leaf-sheath oral hairs lacking, or ciliate. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 13–16 cm long; 37–40 mm wide. Leaf-blade margins scabrous. 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; 5–7 cm long. Rhachis fragile at the nodes. 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; 6 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; hairy at base; tip rectangular; winged.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 7–8 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 7–8 mm long; 1 length of upper glume; chartaceous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface puberulous. Lower glume apex acute. Upper glume lanceolate; 7–8 mm long; 1.5 length of adjacent fertile lemma; chartaceous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume surface puberulous. Upper glume apex acute.
FLORETS Fertile florets female. Fertile lemma ovate; 5 mm long; coriaceous; without keel; 3 -veined. Lemma surface scaberulous; rough above. Lemma apex acute. Palea coriaceous; without keels.
FLOWER Lodicules 3; orbicular; 1 mm long. Anthers 20. Filaments united in a tube. Stigmas 2.
MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; ovate; 6–7 mm long. Male spikelet glumes 2; lanceolate and ovate (unequal); 3.5–4 mm long. Male spikelet lemma 6–7 mm long.
DISTRIBUTION South America: Mesoamericana, northern South America, western South America, and Brazil.
NOTES Parianeae. Tutin 1995.
ADDITIONAL CHARACTERS Male glumes unequal; male glumes decurrent.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
