GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Pariana velutina

HABIT Perennial. Rhizomes short. Culms erect; 45–50 cm long. Culm-internodes distally pubescent. Leaves cauline. Leaf-sheaths longer than adjacent culm internode; keeled; pubescent. Leaf-sheath oral hairs setose. Leaf-sheath auricles erect. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate, or ovate; 12–16 cm long; 20–46 mm wide. Leaf-blade surface pubescent; hairy on both sides. 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; 5–6 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; 2–2.5 mm long; villous; hairy at base; 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; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 5 mm long; 1 length of upper glume; chartaceous; 1-keeled; 1–3 -veined. Lower glume surface pubescent. Lower glume apex obtuse, or acute. Upper glume ovate; 5 mm long; 1 length of adjacent fertile lemma; chartaceous; 1-keeled; 1–3 -veined. Upper glume surface pubescent. Upper glume apex obtuse, or acute.

FLORETS Fertile florets female. Fertile lemma ovate; 5 mm long; coriaceous; without keel. Lemma surface pubescent; hairy above. Lemma apex acute. Palea coriaceous; without keels.

FLOWER Lodicules 3. Anthers 2.5 mm long. Stigmas 2.

MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; ovate; 4.5 mm long; hairy. Male spikelet glumes 2; triangular; 2–2.5 mm long. Male spikelet lemma 4.5 mm long; 3 -veined.

DISTRIBUTION South America: western South America.

NOTES Parianeae. Gr Peru 1995.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.