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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.
Diandrolyra pygmaea
HABIT Perennial; caespitose. Culms erect; 8.5–19 cm long; 0.6–1 mm diam. Culm-internodes distally pubescent. Culm-nodes glabrous, or pubescent. Leaves cauline; 4–8 per branch. Leaf-sheaths glabrous on surface, or pilose. Ligule an eciliate membrane; 0.2–0.3 mm long. Leaf-blade base symmetrical, or asymmetrical; with a brief petiole-like connection to sheath; petiole 0.05–0.1 cm long; petiole pilose. Leaf-blades lanceolate; 1.8–3(–4) cm long; 2–8 mm wide. Leaf-blade surface glabrous, or pubescent; hairy abaxially. Leaf-blade margins scabrous. Leaf-blade apex acute.
INFLORESCENCE Monoecious; with male and female spikelets in the same inflorescence. Synflorescence on a specialized culm bearing a single leaf-blade. Inflorescence composed of racemes.
Racemes 1; single; unilateral; 0.7–1 cm long; bearing few fertile spikelets; bearing 2(–3) 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 pubescent.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic, or ovate; dorsally compressed; acute; 4.8–5 mm long; 1.4–1.6 mm wide; falling entire.
GLUMES Glumes similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 4.5–5 mm long; 1 length of upper glume; herbaceous; much thinner on margins; without keels; 5–7 -veined. Upper glume ovate; 4.5–5 mm long; 1.2 length of adjacent fertile lemma; herbaceous; with membranous margins; without keels; 5–7 -veined.
FLORETS Fertile florets female. Fertile lemma elliptic, or ovate; 4–4.3 mm long; indurate; pallid, or yellow; without keel. Lemma margins involute. Lemma apex acute.
FLOWER Lodicules 3. Anthers 2; 0.6–0.8 mm long.
FRUIT Caryopsis with adherent pericarp; ellipsoid; 3 mm long. Hilum linear; 1 length of caryopsis.
MALE Male spikelets distinct from female; 1 flowered; separately deciduous; lanceolate; 3 mm long; hairy. Male spikelet glumes 1; ovate; 0.5 mm long; 5 -veined. Male spikelet lemma 3 -veined; muticous.
DISTRIBUTION South America: Brazil.
NOTES Olyreae. Oliveira & Clark 2011.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
