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.

Rhynchoryza subulata

HABIT Perennial; caespitose. Culms 200–300 cm long. Leaf-sheath auricles erect. Ligule an eciliate membrane; 18–30 mm long. Leaf-blades 60–120 cm long; 10 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 20–30 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels cuneate; angular; bibracteate.

FERTILE SPIKELETS Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 17–20 mm long; falling entire.

GLUMES Glumes both absent or obscure.

FLORETS Basal sterile florets similar; barren; without significant palea. Lemma of lower sterile floret ovate; 2–2.5 mm long; 0.1 length of spikelet; membranous; 1 -veined; without lateral veins; cuspidate. Lemma of upper sterile floret ovate; 2–2.5 mm long; 1 length of lower sterile floret; membranous. Fertile lemma elliptic; 7–10 mm long (body); indurate; keeled; 5 -veined. Lemma lateral veins ribbed. Lemma surface scaberulous. Lemma margins involute. Lemma apex rostrate; with a conical beak; with this appendage 10 mm long; awned. Principal lemma awn 10–25 mm long overall. Palea elliptic; 1 length of lemma; indurate; 3 -veined; without keels.

FLOWER Lodicules 2. Anthers 6.

FRUIT Caryopsis with adherent pericarp; 6.5–7 mm long.

DISTRIBUTION South America: Brazil and southern South America.

NOTES Oryzeae. WDC.

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