Poaceae
Rhynchoryza

Rhynchoryza subulata (Nees) Baill.

First published in Hist. Pl. 12: 292 (1893)
This species is accepted
The native range of this species is S. Brazil to NE. Argentina. It is a perennial and grows primarily in the subtropical biome.

Descriptions

Morphology General 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.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; 20-30 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels cuneate; angular; bibracteate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 17-20 mm long; falling entire.
Fertile
Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 17-20 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes both absent or obscure.
Morphology Reproductive morphology Flowers 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.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 6.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 6.5-7 mm long.
Distribution
South America: Brazil and southern South America.
Reference
Oryzeae. WDC.
[GB]

Sources

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0