Poaceae
Agropyron

Agropyron michnoi Roshev.

First published in Izv. Glavn. Bot. Sada S.S.S.R. 28: 384 (1929)
This species is accepted
The native range of this species is Siberia to China (Nei Mongol). It is a perennial or rhizomatous geophyte and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose; clumped loosely. Rhizomes elongated. Culms 50-90 cm long. Culm-internodes smooth; distally glabrous. Leaf-sheaths glabrous on surface. Leaf-sheath auricles absent. Ligule an eciliate membrane; 0.5-1 mm long. Leaf-blades 10-20 cm long; 5 mm wide. Leaf-blade surface puberulous; hairy adaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1; single; oblong, or ovate; bilateral; 2-8 cm long; 10-20 mm wide. Rhachis pubescent on surface. Spikelet packing broadside to rhachis; crowded. Rhachis internodes oblong. Spikelets pectinate; solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 10-15 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 10-15 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet; firmer than fertile lemma. Lower glume lanceolate; 4-6 mm long; 1 length of upper glume; coriaceous; much thinner on margins; 1-keeled; keeled all along; 1 -veined. Lower glume primary vein eciliate, or ciliate. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn 1 mm long. Upper glume lanceolate; 4-6 mm long; 0.75-1 length of adjacent fertile lemma; coriaceous; with scarious margins; 1-keeled; keeled all along; 1 -veined. Upper glume primary vein eciliate, or ciliate. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 1 mm long.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 6-8 mm long; chartaceous; glaucous; keeled; 5 -veined. Lemma surface pilose to villous. Lemma apex acute; awned; 1 -awned. Principal lemma awn 2 mm long overall. Palea 1 length of lemma. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Anthers 3; 5-5.5 mm long. Ovary with a fleshy appendage below style insertion; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex; apex fleshy. Hilum linear. Disseminule comprising a floret.
Distribution
Asia-temperate: Siberia, China, and Mongolia.
Reference
Triticeae. Fl USSR 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]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/44392949/44409586

Conservation
LC - least concern
[IUCN]

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/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/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