Poaceae
Elymus

Elymus stenostachyus (Melderis) O.Andersson & Podlech

First published in Mitt. Bot. Staatssamml. München 12: 315 (1976)
This species is accepted
The native range of this species is E. Afghanistan. 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: low confidence
[AERP]

Morphology General Habit
Perennial; caespitose. Butt sheaths pubescent. Culms slender; 50-60 cm long; 2-3 -noded. Culm-internodes distally pubescent. Ligule an eciliate membrane; 0.2-0.5 mm long; lacerate. Leaf-blades flat, or convolute; 11-17 cm long; 2-4 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous, or pubescent; hairy abaxially. Leaf-blade margins scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Peduncle pubescent above. Racemes 1; single; erect, or drooping; bilateral; 12-15 cm long. Rhachis flattened; scabrous on surface; ciliate on margins. Spikelet packing broadside to rhachis. Rhachis internodes linear. Rhachis internode tip flat. Spikelets solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 15-20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent. Floret callus evident; acute.
Fertile
Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 15-20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent. Floret callus evident; acute.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes collateral; persistent; similar; shorter than spikelet. Lower glume lanceolate; 7.5-8.5 mm long; 0.8-0.9 length of upper glume; coriaceous; without keels; 3-5 -veined. Lower glume lateral veins prominent. Lower glume surface scabrous; rough on veins. Lower glume apex attenuate; awned; 1 -awned. Lower glume awn 2.5-4 mm long. Upper glume lanceolate; 8-10 mm long; 1 length of adjacent fertile lemma; coriaceous; without keels; 3-5 -veined. Upper glume lateral veins prominent. Upper glume surface scabrous; rough on veins. Upper glume apex attenuate; awned; 1 -awned. Upper glume awn 2.5-4 mm long.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 8-9 mm long; coriaceous; 5 -veined. Lemma lateral veins prominent. Lemma apex acute; awned; 1 -awned. Principal lemma awn straight, or curved; 9.5-20 mm long overall. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 3-3.5 mm long; yellow. Stigmas 2. Ovary pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Asia-temperate: western Asia.
Reference
Triticeae. Fl Iran 1995.
[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

    • 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 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