Poaceae
Eragrostis

Eragrostis stagnalis Lazarides

First published in Austral. Syst. Bot. 10: 152 (1997)
This species is accepted
The native range of this species is N. Northern Territory to Queensland. It is a perennial and grows primarily in the seasonally dry 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. Cataphylls evident. Butt sheaths glossy; glabrous. Culms slender; 35-95 cm long; 3-5 -noded. Culm-internodes eglandular. Lateral branches lacking, or sparse. Leaf-sheaths tight; eglandular. Leaf-sheath oral hairs scanty, or lacking. Ligule a fringe of hairs; 0.1-0.3 mm long. Leaf-blades lanceolate, or elliptic; 1-2.8 mm wide. Leaf-blade surface scaberulous; rough adaxially; glabrous. Leaf-blade margins eglandular; scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle eglandular. Panicle open; elliptic; 25-33 cm long; 6-8 cm wide. Primary panicle branches spreading, or drooping; distant; 4-9 cm long; naked below, or bearing spikelets almost to the base. Panicle axis eglandular. Panicle branches capillary; eglandular. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1-7.5 mm long; eglandular.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 10-61 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed, or subterete; 5.4-30 mm long; 0.8-1.5 mm wide; breaking up at maturity; rhachilla persistent; retaining paleas. Rhachilla internodes zig-zag; 0.4-0.5 mm long; obscured by lemmas.
Fertile
Spikelets comprising 10-61 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed, or subterete; 5.4-30 mm long; 0.8-1.5 mm wide; breaking up at maturity; rhachilla persistent; retaining paleas. Rhachilla internodes zig-zag; 0.4-0.5 mm long; obscured by lemmas.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; similar; shorter than spikelet. Lower glume linear, or lanceolate; 0.9-1 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume linear, or lanceolate; 0.9-1.8 mm long; 0.5-0.6 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 1.5-2 mm long; membranous; dull; keeled; 3 -veined. Lemma apex acute, or acuminate. Palea oblanceolate; with flaps narrower than body; hyaline; 2 -veined. Palea keels scaberulous; adorned above. Palea surface smooth, or scaberulous (on flaps). Palea apex acute. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3; 0.2-0.4 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with free soft pericarp; linear, or oblong; isodiametric; 0.5-0.8 mm long.
Distribution
Australasia: Australia.
Reference
Eragrostideae. Lazarides 1997.
[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 2024. 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 2024. 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