Poaceae
Koeleria

Koeleria tzvelevii N.V.Vlassova

First published in Bot. Zhurn. (Moscow & Leningrad) 72: 1668 (1987)
This species is accepted
The native range of this species is SE. Siberia. 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: threatened. Confidence: confident
[AERP]

Morphology General Habit
Perennial; caespitose; clumped loosely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths, or fibrous dead sheaths. Culms 30-40 cm long. Culm-internodes distally pilose. Ligule an eciliate membrane. Leaf-blades flat; 8-15 cm long; 1-1.5 mm wide; stiff. Leaf-blade surface smooth, or scaberulous; rough adaxially; glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; oblong; 6-7 cm long; 1 cm wide. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets obovate; laterally compressed; 4-4.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.
Fertile
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets obovate; laterally compressed; 4-4.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet, or reaching apex of florets; similar to fertile lemma in texture; shiny; gaping. Lower glume lanceolate; 3-3.5 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume oblong; 4 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume primary vein scaberulous. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 3.5-4 mm long; membranous; shiny; keeled. Lemma surface pilose. Lemma apex acute; mucronate. Palea gaping.
Morphology Reproductive morphology Flowers
Anthers 3.
Distribution
Asia-temperate: Siberia.
Reference
Aveneae. Vlassova 2006.
[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 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