Poaceae
Agrostis

Agrostis thompsoniae S.W.L.Jacobs

First published in Telopea 9: 682 (2001 publ. 2002)
This species is accepted
The native range of this species is SE. Australia. It is an annual and grows primarily in the temperate 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
Annual; caespitose; clumped loosely. Culms erect, or geniculately ascending; slender; 20-40 cm long; 2 -noded. Culm-internodes striate. Leaves mostly basal. Leaf-sheaths loose. Ligule an eciliate membrane; 3-5 mm long; obtuse. Leaf-blades 2.5 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate, or ovate; 6-12 cm long; bearing few spikelets. Panicle branches straight. Spikelets solitary. Fertile spikelets pedicelled. Pedicels straight; 1-2 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 1.5-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 1.5-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 1.5-2.5 mm long; 1 length of upper glume; membranous; light green, or purple; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 1.5-2.5 mm long; 1.1-1.4 length of adjacent fertile lemma; membranous; light green, or purple; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute, or acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 1.3-1.8 mm long; hyaline; without keel; 5 -veined. Lemma apex truncate; muticous. Palea absent or minute.
Morphology Reproductive morphology Flowers
Anthers 3; 0.4-0.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Australasia: Australia.
Reference
Aveneae. Jacobs 2005.
[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

  • 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