Poaceae
Greslania

Greslania rivularis Balansa

First published in Bull. Soc. Bot. France 19: 320 (1872 publ. 1873)
This species is accepted
The native range of this species is New Caledonia. It is a bamboo and grows primarily in the wet tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Morphology General Habit
Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 90-350 cm long; 5-15 mm diam.; woody. Culm-internodes terete; thin-walled; 10-20 cm long; smooth; distally glabrous. Lateral branches lacking, or sparse. Bud complement 1. Leaves 10-26 per branch. Leaf-sheaths longer than adjacent culm internode; smooth; glabrous on surface. Leaf-sheath oral hairs ciliate; curly and deciduous. Ligule an eciliate membrane. Leaf-blade base broadly rounded, or cordate; with a brief petiole-like connection to sheath; petiole 0.2-0.5 cm long. Leaf-blades deciduous at the ligule; lanceolate, or oblong, or ovate; 7-20 cm long; 20-40 mm wide; coriaceous; stiff. Leaf-blade midrib conspicuous. Leaf-blade venation without cross veins. Leaf-blade surface smooth; glabrous. Leaf-blade apex attenuate; filiform.
Morphology Reproductive morphology Inflorescences
Synflorescence bractiferous; paniculate; 10-40 cm long; open; with spathaceous subtending bracts (with dwarf blade), or foliaceous subtending bracts (sparsely); bracts 4-10 mm long; without axillary buds at base of spikelet; prophyllate below lateral spikelets. Fertile spikelets sessile, or pedicelled. Pedicels 0.5-1.5 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 5-6 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 5-6 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 2.5-3 mm long; scarious; without keels; 9 -veined. Lower glume surface glabrous. Lower glume apex truncate, or obtuse. Upper glume oblong, or ovate; 4-5 mm long; scarious; without keels; 11 -veined. Upper glume apex truncate, or obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong, or ovate; 5-6 mm long; chartaceous, or coriaceous; without keel; 9 -veined. Lemma surface glabrous; inner surface pubescent (at apex). Lemma apex obtuse; cucullate. Palea 5.5 mm long; 1 length of lemma; coriaceous; 6 -veined. Palea keels approximate. Rhachilla extension 4 mm long.
Morphology Reproductive morphology Flowers
Lodicules 3; glabrous. Anthers 6. Stigmas 3. Ovary umbonate; glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; oblong, or ovoid; 4 mm long.
Distribution
Pacific: southwestern.
Reference
Bambuseae. WDC 2007.
Diagnostic
Synflorescence branches straight.
[GB]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • 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

  • Herbarium Catalogue Specimens

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. 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 2025. 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