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Descriptions

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

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

Pariana ecuadorensis

HABIT Perennial. Culms erect; 20–40 cm long. Culm-internodes 4–9 cm long. Lateral branches lacking. Leaves cauline; 5 per branch. Leaf-sheath oral hairs setose; 10–20 mm long. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades oblong, or ovate; 6–11 cm long; 20–35 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; oblong; multilateral; 9.5 cm long. Rhachis fragile at the nodes; flattened. Spikelet packing crowded. Rhachis internodes 5.5 mm long.

Sexes mixed (in a cluster at each node). Spikelets appressed; 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; cuneate; flattened; 3 mm long; puberulous; hairy at base; hairy on surface and margins; tip rectangular.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5 mm long; falling entire; deciduous with accessory branch structures.

GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; chartaceous; without keels; 1 -veined. Lower glume apex acute. Upper glume ovate; chartaceous; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile florets female. Fertile lemma ovate; 4 mm long; coriaceous; without keel; 3 -veined. Lemma apex acute. Palea 1 length of lemma; coriaceous; 4 -veined; without keels.

FLOWER Lodicules 3. Anthers 20. Stigmas 2.

MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; elliptic; 5.5 mm long. Male spikelet glumes 2; ovate; 3–3.5 mm long. Male spikelet lemma 6–7 mm long; 7 -veined.

DISTRIBUTION South America: western South America.

NOTES Parianeae. Pilger 2001.

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