Deschampsia antarctica É.Desv.

First published in C.Gay, Fl. Chil. 6: 338 (1854)
This species is accepted
The native range of this species is S. South America to Antarctica. It is a perennial 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
Perennial; cushion forming. Culms 10-30 cm long. Ligule an eciliate membrane; 4-8 mm long; acuminate. Leaf-blades filiform; convolute; 2.5-3 mm wide. Leaf-blade surface smooth, or scaberulous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; not deciduous as a whole, or deciduous as a whole; exserted, or embraced at base by subtending leaf, or enclosed. Panicle open, or contracted; lanceolate, or pyramidal; 5-20 cm long. Panicle branches capillary; puberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels puberulous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; 1-1.3 mm long; pilose. Floret callus pilose. Floret callus hairs 0.33 length of lemma.
Fertile
Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; 1-1.3 mm long; pilose. Floret callus pilose. Floret callus hairs 0.33 length of lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; similar to fertile lemma in texture; shiny. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein ciliolate. Lower glume lateral veins absent. Lower glume apex acute. Upper glume elliptic; 2-2.3 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein ciliolate. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 2.5-3 mm long; membranous; shiny; without keel; 5 -veined. Lemma surface smooth, or scaberulous; rough above. Lemma apex dentate; 4 -fid; with outer lobes longer; with lobes 0.5 mm long; awned; 1 -awned. Principal lemma awn dorsal; arising 0.25-0.33 way up back of lemma; straight, or geniculate; 3.5-5.5 mm long overall; clearly exserted from spikelet; without a column, or with a straight or slightly twisted column. Rhachilla extension pilose.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 0.4-0.5 mm long; retained within floret. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; fusiform; 1-1.2 mm long; dark brown. Hilum punctiform.
Distribution
South America: southern South America. Antarctic: Subantarctic islands and Antarctic continent.
Reference
Aveneae. Fl Pat 1995.
[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

    • 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
  • Kew Science Photographs

    • Copyright applied to individual images