Poaceae
Alpagrostis

Alpagrostis setacea (Poir.) P.M.Peterson, Romasch., Soreng & Sylvester

First published in PhytoKeys 167: 74 (2020)
This species is accepted
The native range of this species is S. Great Britain to SW. Europe, Morocco. 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; caespitose. Culms erect, or geniculately ascending; 10-60 cm long; 2-3 -noded. Culm-internodes scaberulous. Leaf-sheaths without keel; scaberulous. Ligule an eciliate membrane; 2-4 mm long; acute. Leaf-blades filiform; conduplicate; 5-20 cm long; 0.2-0.3 mm wide. Leaf-blade surface scaberulous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Peduncle scaberulous above. Panicle contracted; lanceolate; 3-10 cm long; 0.5-1.5 cm wide. Panicle branches terete; scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; terete; 1-4 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; 3-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; 3-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 1-1.3 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 1.4-1.5 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong, or ovate; 2-2.7 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma apex truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; geniculate; 4-5 mm long overall; with twisted column. Palea oblong; 0.1-0.25 length of lemma; hyaline; 2 -veined. Palea apex obtuse.
Morphology Reproductive morphology Flowers
Lodicules 2; lanceolate; membranous. Anthers 3; 1.5-2 mm long. Stigmas 2; laterally exserted.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid; isodiametric; biconvex; estipitate; without sulcus; 1.5 mm long; smooth; apex unappendaged. Embryo 0.2 length of caryopsis. Hilum linear; 0.9 length of caryopsis. Endosperm farinose.
Distribution
Europe: northern and southwestern. Africa: north.
Reference
Aveneae. =Agrostis setacea. CEH.
[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