Poaceae
Agrostis

Agrostis atlantica Maire & Trab.

First published in Bull. Soc. Hist. Nat. Afrique N. 15: 392 (1924)
This species is accepted
The native range of this species is Morocco (High Atlas Mountains). 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: low confidence
[AERP]

Morphology General Habit
Perennial; caespitose. Culms erect; 10-40 cm long. Culm-internodes smooth. Leaf-sheaths without keel; smooth; glabrous on surface. Ligule an eciliate membrane; 2-3 mm long; erose, or lacerate; obtuse. Leaf-blades conduplicate; 3-7 cm long; 1-1.3 mm wide. Leaf-blade venation with 7-9 secondary veins; 3-5 inner ridges. Leaf-blade surface scabrous; rough adaxially; glabrous. Leaf-blade margins scabrous. Leaf-blade apex obtuse, or abruptly acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; oblong; 4-7 cm long. Primary panicle branches ascending, or spreading; 4-6 -nate. Panicle axis smooth. Panicle branches capillary; smooth, or scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels smooth, or scaberulous; tip widened.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2-2.25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.25 mm long.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2-2.25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.25 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume oblong; 2-2.75 mm long; 1.2 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume oblong; 1.75-2.5 mm long; 1.2 length of adjacent fertile lemma; membranous; purple; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 1.6-2 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins excurrent (0.3mm). Lemma surface pilose. Lemma apex dentate; 2 -fid; truncate, or obtuse; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33-0.5 way up back of lemma; geniculate; 2-3 mm long overall; with twisted column. Palea 0.25-0.33 length of lemma; hyaline.
Morphology Reproductive morphology Flowers
Lodicules absent. Anthers 3; 1.5-2 mm long; yellow.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; oblong; sulcate on hilar side; 1-1.2 mm long. Embryo 0.25-0.33 length of caryopsis. Hilum elliptic.
Distribution
Africa: north.
Reference
Aveneae. Fl Afr N 1994.
[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 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