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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 swallenii
HABIT Perennial. Culms erect; 56–68 cm long. Leaves cauline. Leaf-sheaths glabrous on surface, or puberulous. Leaf-sheath oral hairs setose; 5–15 mm long. Ligule an eciliate membrane; 5 mm long. Leaf-blade base cuneate; with a brief petiole-like connection to sheath. Leaf-blades ovate; 18–29 cm long; 55–65 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; 14.5 cm long. Rhachis fragile at the nodes; terminating in a 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 (male); with pedicels forming a cup; oblong. Pedicels fused to each other; united along margins; oblong; flattened; 1–4.8 mm long; ciliate; hairy at base; tip rectangular.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 7.3–9.3 mm long; falling entire; deciduous with accessory branch structures.
GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 7.3–9.3 mm long; 1 length of upper glume; chartaceous; 1-keeled. Lower glume apex acute. Upper glume ovate; 7.3–9.3 mm long; chartaceous; 1-keeled. Upper glume apex acute.
FLORETS Fertile florets female. Fertile lemma ovate; 6.5–7.5 mm long; coriaceous; without keel. Lemma apex acute. Palea coriaceous.
FLOWER Lodicules 3. Stigmas 2.
MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; ovate; 4.5–8.5 mm long; acute. Male spikelet glumes 2; triangular; 1.8–4.8 mm long; muticous. Male spikelet lemma 4.5–8.5 mm long; muticous.
DISTRIBUTION South America: western South America.
NOTES Parianeae. Gr Bolivia 1997.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
