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.

Sucrea monophylla

HABIT Perennial; caespitose. Rhizomes short. Culms 50–100 cm long; without nodal roots. Culm-nodes black. Lateral branches lacking. Leaves cauline; 1 per branch. Ligule absent. Leaf-blade base with a false petiole. Leaf-blades elliptic; 20–38 cm long; 40–100 mm wide. Leaf-blade venation with distinct cross veins. 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, or on a separate leafless culm. Inflorescence a panicle. Peduncle pilose above.

Panicle open; pyramidal; 8–17 cm long; 8–10 cm wide. Primary panicle branches whorled at lower nodes; 5–10 cm long. Panicle branches pubescent.

Sexes segregated; on bisexual branches; with male below. Spikelets solitary. Fertile spikelets pedicelled. Male spikelets pedicelled. Pedicels linear; tip pyriform.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 6.5–8.5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes deciduous; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 1 length of upper glume; membranous; firmer on margins; without keels; 5 -veined. Lower glume lateral veins with cross-veins. Lower glume surface concave. Lower glume apex acuminate; awned. Lower glume awn 2 mm long. Upper glume ovate; 1.25 length of adjacent fertile lemma; membranous; with cartilaginous margins; without keels; 3 -veined. Upper glume lateral veins with cross-veins. Upper glume surface pubescent. Upper glume apex acuminate.

FLORETS Fertile florets female. Fertile lemma elliptic; 5.7 mm long; indurate; pallid; without keel; 5 -veined. Lemma surface punctate. Lemma margins covering most of palea. Lemma apex acute. Palea 1.1 length of lemma; indurate; without keels.

FLOWER Lodicules 3; cuneate; 1 mm long; veined. Anthers 3; 4 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear. Endosperm farinose.

MALE Male spikelets distinct from female; 1 flowered; separately deciduous; linear; 5–7 mm long. Male spikelet glumes absent. Male spikelet lemma 3 -veined; awned.

DISTRIBUTION South America: Brazil.

NOTES Olyreae. WDC.

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