Poaceae
Echinochloa

Echinochloa paludigena Wiegand

First published in Rhodora 23: 64 (1921)
This species is accepted
The native range of this species is Florida. It is an annual 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
Annual; culms solitary. Culms erect; 100-150 cm long. Leaf-sheaths glabrous on surface. Ligule absent. Leaf-blades 15-60 cm long; 8-20 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous. Leaf-blade margins scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 10-20; borne along a central axis; unilateral; 2-14 cm long; with branchlets at base of longer racemes. Central inflorescence axis 15-40 cm long. Rhachis subterete. Spikelet packing 4 -rowed. Raceme-bases brief; pilose. Spikelets in pairs. Fertile spikelets pedicelled; subequal. Pedicels unequal.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; cuspidate; 4.2-4.5 mm long; 2.4-2.6 mm wide; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; cuspidate; 4.2-4.5 mm long; 2.4-2.6 mm wide; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; clasping; 0.5 length of spikelet; without keels; 3 -veined. Lower glume surface hispidulous. Lower glume apex cuspidate. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume surface hispidulous. Upper glume apex cuspidate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 5 -veined; hispidulous; acuminate; awned. Awn of lower sterile floret 1-15 mm long. Fertile lemma ovate; 4-4.2 mm long; indurate; much thinner above; shiny; without keel. Lemma margins involute. Lemma apex cuspidate; laterally pinched. Palea reflexed at apex; indurate.
Morphology Reproductive morphology Flowers
Anthers 3; 1.2-1.7 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; 1.5-1.8 mm long. Embryo 0.8 length of caryopsis.
Distribution
North America: southeast USA.
Reference
Paniceae. Gould 1994.
[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