Oryza schlechteri

HABIT Annual. Culms erect; 30–90 cm long. Ligule an eciliate membrane; 1–2 mm long. Leaf-blades 20–30 cm long; 5–10 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; dense; 3–6 cm long. Primary panicle branches spreading. Panicle branches angular.

Spikelets spreading; solitary. Fertile spikelets pedicelled. Pedicels linear; angular; 1 mm long; tip cupuliform.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets orbicular; laterally compressed; gibbous; 1.5–1.7 mm long; falling entire. Spikelet callus glabrous; base truncate.

GLUMES Glumes both absent or obscure.

FLORETS Basal sterile florets similar; barren; without significant palea. Lemma of lower sterile floret lanceolate; 0.2 mm long; 0.1 length of spikelet; 1 -veined; without lateral veins; acute. Lemma of upper sterile floret lanceolate; 0.2 mm long; 1 length of lower sterile floret. Fertile lemma orbicular; laterally compressed; gibbous; 1.5–1.7 mm long; coriaceous; keeled; 5 -veined. Lemma surface striate. Lemma margins interlocking with palea margins. Lemma apex rostrate; muticous. Palea elliptic; coriaceous; 3 -veined; 1-keeled. Palea surface smooth. Palea apex acute.

FLOWER Lodicules 2; membranous. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Disseminule comprising a floret.

DISTRIBUTION Asia-tropical: Papuasia.

NOTES Oryzeae. Pilger.

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