Poaceae
Agrostis

Agrostis umbellata Colla

First published in Mem. Reale Accad. Sci. Torino 39: 23 (1836)
This species is accepted
The native range of this species is Central Chile. It is an annual and grows primarily in the subtropical 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: low confidence
[AERP]

Morphology General Habit
Annual, or perennial; short-lived; caespitose. Culms erect; 20-65 cm long; 2-3 -noded. Culm-internodes brown; distally glabrous. Lateral branches lacking. Leaf-sheaths striately veined; glabrous on surface. Ligule an eciliate membrane; 2.5-3 mm long; glabrous on abaxial surface; erose; acute. Leaf-blades 3-8 cm long; 1-2 mm wide. Leaf-blade surface scaberulous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; effuse; 8-13 cm long; 5-10 cm wide. Primary panicle branches whorled at most nodes; branching divaricately. Panicle axis smooth. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 8-22 mm long; scabrous; tip widened.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2.7-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus sparsely hairy; hairy on the margins.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2.7-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus sparsely hairy; hairy on the margins.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume lanceolate; 2.7-4 mm long; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume surface asperulous. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 1.8-2.2 mm long; hyaline; without keel; 5 -veined. Lemma surface scaberulous. Lemma apex erose; truncate; awned; 1 -awned. Principal lemma awn subapical; straight; 1.4-2.5 mm long overall; clearly exserted from spikelet. Palea 0.2-0.4 mm long; 0.1-0.2 length of lemma; 0 -veined.
Morphology Reproductive morphology Flowers
Lodicules 2; 0.3 mm long; membranous. Anthers 3; 1-1.4 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 1.6-1.7 mm long. Hilum elliptic. Endosperm farinose.
Distribution
South America: southern South America.
Reference
Aveneae. Rugolo & Molina 2001.
[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 2026. 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 2026. 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