Poaceae
Festuca

Festuca bidenticulata E.B.Alexeev

First published in Bot. Zhurn. (Moscow & Leningrad) 66: 1496 (1981)
This species is accepted
The native range of this species is Mexico (Veracruz). It is a perennial and grows primarily in the subtropical 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. Cataphylls inconspicuous. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations extravaginal. Culms erect; 50-110 cm long. Culm-internodes smooth; distally glabrous. Lateral branches lacking. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 0.5 mm long; truncate. Leaf-blades 3-5 mm wide. Leaf-blade venation with subepidermal sclerenchyma attached to veins above and below; without layer of subepidermal sclerenchyma masking vein striation. Leaf-blade surface smooth.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; 15-23 cm long. Panicle axis smooth. Panicle branches smooth. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 9.5-11 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 9.5-11 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume linear; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; chartaceous; without keels. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 6.5-7 mm long; chartaceous; without keel; 5 -veined. Lemma lateral veins distinct. Lemma surface scaberulous; rough above. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; 0.3-1.8 mm long overall. Palea 2 -veined. Palea keels scaberulous; with 0.33 of their length adorned. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3; 3.5-4 mm long. Ovary with a few apical hairs.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum linear.
Distribution
North America: Mexico.
Reference
Poeae. Alexeev 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 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