Poaceae
Alopecurus

Alopecurus longearistatus Maxim.

First published in Mém. Acad. Imp. Sci. St.-Pétersbourg Divers Savans 9: 327 (1859)
This species is accepted
The native range of this species is Russian Far East to N. China. It is a perennial or annual and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Annual. Culms geniculately ascending; 15-35 cm long. Leaf-sheaths loose; smooth. Ligule an eciliate membrane; 3-4 mm long; acute. Leaf-blades 3-10 cm long; 1-2 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle; subtended by an inflated leaf-sheath; embraced at base by subtending leaf. Panicle spiciform; linear; 4-7 cm long; 0.3-0.5 cm wide. Panicle axis with rounded ribs. Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2.5-3 mm long; falling entire.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2.5-3 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes connate along margins below; 0.33-0.5 of their length connate; similar; shorter than spikelet. Lower glume oblong; 2.5-3 mm long; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; 3 -veined. Lower glume primary vein ciliate. Lower glume apex acute. Upper glume oblong; 2.5-3 mm long; 1 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; 3 -veined. Upper glume primary vein ciliate. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 2.5-3 mm long; membranous; keeled; 3 -veined. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.25-0.33 way up back of lemma; geniculate; 5-9 mm long overall; clearly exserted from spikelet; with twisted column. Palea absent or minute.
Morphology Reproductive morphology Flowers
Lodicules absent. Anthers 3; 0.5-0.7 mm long. Stigmas protogynous; terminally exserted; pubescent. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a spikelet.
Distribution
Asia-temperate: Soviet far east and China.
Reference
Aveneae. Fl USSR 1995.
[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

  • 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 2025. 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 2025. 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