Poaceae
Elymus

Elymus puberulus (Keng) S.L.Chen

First published in Fl. China 22: 424 (2006)
This species is accepted
The native range of this species is China (Chongqing). 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. Culms erect, or geniculately ascending; 60 cm long; 1-1.5 mm diam.; 4-5 -noded; with 0.5 of their length below uppermost node. Culm-nodes glabrous. Leaf-sheaths 8.3-10.6 cm long; mostly shorter than adjacent culm internode; glabrous on surface, or puberulous. Ligule an eciliate membrane; 0.3 mm long; scarious; entire, or erose; truncate. Leaf-blades 15-22 cm long; 5-7 mm wide; glaucous. Leaf-blade surface puberulous; hairy adaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1; single; bilateral; 8-11 cm long. Rhachis flattened. Spikelet packing broadside to rhachis; regular; 2 -rowed. Rhachis internodes 10(-16) mm long. Spikelets solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-2.5 mm long; pubescent. Floret callus pubescent. Floret callus hairs 0.3-0.3 mm long.
Fertile
Spikelets comprising 2-3 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2-2.5 mm long; pubescent. Floret callus pubescent. Floret callus hairs 0.3-0.3 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; subequal in width; shorter than spikelet. Lower glume lanceolate, or oblong; 4.5-6 mm long; coriaceous; without keels; 3-5 -veined. Lower glume apex obtuse; muticous. Upper glume lanceolate, or oblong; 5.5-7 mm long; coriaceous; without keels; 5 -veined. Upper glume apex acute; muticous.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 8.5-9 mm long; coriaceous; without keel; 5 -veined. Lemma surface smooth, or scaberulous. Lemma apex awned; 1 -awned. Principal lemma awn straight; 17-23 mm long overall. Palea 0.9 length of lemma; 2 -veined. Palea keels smooth, or scaberulous; adorned above. Palea apex emarginate, or obtuse. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 1.4 mm long; yellow. Stigmas 2. Ovary pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex; apex unappendaged. Hilum linear.
Distribution
Asia-temperate: China.
Reference
Triticeae. Chen 2001.
[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