Eriochloa nana Arriaga

First published in Hickenia 2: 139 (1995)
This species is accepted
The native range of this species is NE. Argentina. It is an annual and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Annual. Culms erect; 30-70 cm long. Culm-nodes pubescent. Leaf-sheaths pubescent. Ligule a fringe of hairs. Leaf-blades 5-8 cm long; 2-4 mm wide. Leaf-blade surface glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 3-6(-8); borne along a central axis; unilateral. Rhachis angular. Spikelet packing adaxial. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acuminate; 4-5.5 mm long; falling entire. Spikelet callus globular; incorporating lowest rhachilla internode with adnate lower glume.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acuminate; 4-5.5 mm long; falling entire. Spikelet callus globular; incorporating lowest rhachilla internode with adnate lower glume.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes one the lower absent or obscure; reaching apex of florets; thinner than fertile lemma. Upper glume ovate; 1 length of spikelet; membranous; without keels. Upper glume surface pubescent. Upper glume apex acuminate; mucronate, or awned; 1 -awned. Upper glume awn 0.3-1 mm long.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; ovate; 3.5-4 length of fertile lemma; pubescent; acuminate; muticous. Fertile lemma elliptic; 2.5 mm long; indurate; without keel. Lemma surface papillose. Lemma margins involute. Lemma apex obtuse; mucronate, or awned; 1 -awned. Principal lemma awn 0.5-0.9 mm long overall. Palea involute; indurate.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; oblong; dorsally compressed; 1.3 mm long. Embryo 0.5 length of caryopsis. Hilum punctiform.
Distribution
South America: southern South America.
Reference
Paniceae. Arriaga 2002.
[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: threatened. Confidence: confident
[AERP]

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