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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 concinna
HABIT Perennial; caespitose. Culms erect; 30–40 cm long; woody. Culm-nodes swollen. Leaves cauline. Leaf-sheath oral hairs scanty. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.3–0.4 cm long; petiole pubescent. Leaf-blades lanceolate; 12–14 cm long; 15–25 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acute.
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; 5.5 cm long; 5–6 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; 2 mm long; glabrous; tip rectangular.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 5 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 5 mm long; 1 length of upper glume; chartaceous; 1-keeled. Lower glume margins ciliate. Lower glume apex acute. Upper glume ovate; 5 mm long; 1.2 length of adjacent fertile lemma; chartaceous; 1-keeled. Upper glume margins ciliate. Upper glume apex acute.
FLORETS Fertile florets female. Fertile lemma ovate; 4 mm long; coriaceous; without keel; 3 -veined. Lemma apex obtuse. Palea coriaceous; without keels.
FLOWER Lodicules 3; glabrous. Anthers 15. Filaments united in a tube. Stigmas 2.
MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; ovate; 4–4.5 mm long; glabrous. Male spikelet glumes 2; linear; 3.5–4 mm long. Male spikelet lemma 4–4.5 mm long; with cross-veins.
DISTRIBUTION South America: Brazil.
NOTES Parianeae. Tutin 1995.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
