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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 distans

HABIT Perennial. Rhizomes short. Culms erect; 40 cm long. Culm-internodes antrorsely scabrous. Lateral branches lacking. Leaves cauline. Leaf-sheaths glabrous on surface, or puberulous. Ligule an eciliate membrane; 2 mm long; pubescent on abaxial surface; truncate. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2 cm long; petiole pubescent. Leaf-blades lanceolate, or oblong; 10–15 cm long; 18–25 mm wide. Leaf-blade surface scaberulous; rough adaxially; pubescent; hairy abaxially. 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. Peduncle pubescent above.

Racemes 1; single; erect; oblong; multilateral; 9.4 cm long. Rhachis fragile at the nodes. Spikelet packing distant.

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; tip rectangular.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 6 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. Lower glume apex acute. Upper glume ovate; chartaceous. Upper glume apex acute.

FLORETS Fertile florets female. Fertile lemma ovate; 5 mm long; coriaceous; without keel. Lemma apex acute. Palea 1 length of lemma; coriaceous; without keels.

FLOWER Lodicules 3. Stigmas 2.

MALE Male spikelets distinct from female; 1 flowered; deciduous with the fertile; ovate; 7 mm long; hairy (glume margins and lemma). Male spikelet glumes 2; ovate; 4–5 mm long; 3 -veined. Male spikelet lemma 7 mm long.

DISTRIBUTION South America: Brazil.

NOTES Parianeae. Swallen 2001.

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