Deschampsia looseriana Parodi

First published in Darwiniana 8: 460 (1949)
This species is accepted
The native range of this species is Central & S. Chile. It is an annual and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Annual. Culms 15-30 cm long; 2-3 -noded. Leaf-sheaths striately veined; glabrous on surface. Ligule an eciliate membrane; 3-6 mm long; acuminate. Leaf-blades flat, or conduplicate; 5-10 cm long; 0.5-1 mm wide; flaccid. Leaf-blade surface smooth; glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; oblong; equilateral, or nodding; 4-8 cm long; 1-2 cm wide. Primary panicle branches ascending; 2-3 -nate; 1-4 cm long; bearing spikelets almost to the base. Panicle branches glabrous, or puberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; 2 mm long; pilose; with 1.5 mm long hairs. Floret callus pubescent.
Fertile
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; 2 mm long; pilose; with 1.5 mm long hairs. Floret callus pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; reaching apex of florets; similar to fertile lemma in texture; shiny. Lower glume lanceolate; 6-7 mm long; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; 3 -veined. Lower glume primary vein scabrous. Lower glume apex acute. Upper glume lanceolate; 6-7 mm long; 1.2-1.4 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 5 mm long; membranous; shiny; without keel; 5 -veined. Lemma surface scaberulous; rough above. Lemma apex dentate; 2 -fid; with simple equal lobes, or with lateral lobes bidentate; awned; 3 -awned. Principal lemma awn dorsal; arising 0.33-0.5 way up back of lemma; geniculate; 7-8 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 0.6-1 mm long. Palea 2 -veined. Palea keels puberulous. Palea apex dentate; 3 -fid. Rhachilla extension 1.5 mm long.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 1(-2); 0.2-0.4 mm long; retained within floret. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; oblong; 2 mm long; dark brown. Hilum punctiform.
Distribution
South America: southern South America.
Reference
Aveneae. Parodi 1996.
[GB]

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]

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