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.

Diandrolyra bicolor

HABIT Perennial; caespitose. Culms erect; 10–20 cm long. Leaves cauline; 5–8 per branch. Ligule absent. Leaf-blade base broadly rounded; with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 6–9 cm long; 10–15 mm wide; mid-green and purple; discolorous with last colour beneath (puple below). Leaf-blade venation with obscure cross veins. Leaf-blade apex acute.

INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Synflorescence on the same culm as leaves (rarely), or on a specialized culm bearing a single leaf-blade. Inflorescence composed of racemes.

Racemes 1; single; unilateral; 1.5 cm long; bearing few fertile spikelets; bearing 4–5 fertile spikelets on each. Rhachis flattened.

Sexes mixed. Spikelets in pairs. Fertile spikelets pedicelled; 1 in the cluster. Male spikelets sessile; 1 in a cluster. Pedicels oblong; 1 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 6 mm long; falling entire. Spikelet callus square; 0.5 mm long.

GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 6 mm long; 1 length of upper glume; herbaceous; without keels; 7 -veined. Lower glume lateral veins with cross-veins. Lower glume apex acuminate. Upper glume ovate; 6 mm long; 1.2 length of adjacent fertile lemma; herbaceous; without keels; 7 -veined. Upper glume lateral veins with cross-veins. Upper glume apex acuminate.

FLORETS Fertile florets female. Fertile lemma ovate; 5 mm long; indurate; pallid; without keel; 5 -veined. Lemma margins involute. Lemma apex acute. Palea 1 length of lemma; indurate; 2 -veined.

FLOWER Lodicules 3; fleshy; truncate. Anthers 2; 1 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; ellipsoid.

MALE Male spikelets distinct from female; 1 flowered; separately deciduous; lanceolate; 5 mm long; glabrous. Male spikelet glumes absent. Male spikelet lemma 3 -veined; muticous.

DISTRIBUTION South America: Brazil.

NOTES Olyreae. WDC.

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