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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 maynensis
HABIT Perennial. Culms erect; 100–150 cm long; 5 mm diam. Culm-internodes distally pubescent. Culm-nodes swollen. Leaves cauline. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane; 5 mm long. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.7–0.8 cm long. Leaf-blades elliptic; 30–35 cm long; 60–90 mm wide; mid-green and glaucous; discolorous with last colour beneath. 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; 8–10 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; 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; 3–4 mm long; ciliate; hairy at base; tip rectangular.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 7 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 7 mm long; 1 length of upper glume; chartaceous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume ovate; 7 mm long; 1.2 length of adjacent fertile lemma; chartaceous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
FLORETS Fertile florets female. Fertile lemma ovate; 6 mm long; coriaceous; without keel; 3 -veined. Lemma apex acute. Palea coriaceous; without keels.
FLOWER Lodicules 3. Stigmas 2.
MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; ovate; 9–10 mm long; glabrous. Male spikelet glumes 2; linear; 7–8 mm long. Male spikelet lemma 9–10 mm long; 1 -veined; without cross-veins.
DISTRIBUTION South America: Mesoamericana and western South America.
NOTES Parianeae. Tutin 1995.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
