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This species is accepted, and its native range is Mexico to Guatemala.
Echinochloa holciformis

[GB]
Morphology General Habit
Perennial. Culms decumbent; 100-150 cm long; 10-15 mm diam.; rooting from lower nodes. Culm-nodes glabrous. Leaf-sheaths glabrous on surface. Ligule a fringe of hairs. Leaf-blades 20-30 cm long; 5-15 mm wide. Leaf-blade surface glabrous. Leaf-blade margins cartilaginous; scabrous; ciliate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes numerous; borne along a central axis; closely spaced; unilateral; 4-8 cm long. Central inflorescence axis 15-30 cm long. Rhachis subterete. Spikelet packing 4 -rowed. 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 elliptic; dorsally compressed; cuspidate; 6-7 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; cuspidate; 6-7 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; clasping; 2-2.5 mm long; 0.33 length of spikelet; without keels; 3 -veined. Lower glume apex acute, or cuspidate. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume surface hispidulous; hairy on veins. Upper glume apex acuminate; mucronate, or awned; 1 -awned. Upper glume awn 0.5-2 mm long.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 5 -veined; hispidulous; hairy on veins; acuminate; awned. Awn of lower sterile floret (10-)35-50 mm long. Fertile lemma ovate; 5-6 mm long; coriaceous; much thinner above; shiny; without keel. Lemma margins involute. Lemma apex acuminate; laterally pinched; mucronate. Palea reflexed at apex; coriaceous.
Morphology Reproductive morphology Flowers
Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
North America: Mexico. South America: Mesoamericana.
Reference
Paniceae. Fl Nov Gall.

Native to:

Guatemala, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Northwest, Mexico Southwest

Echinochloa holciformis (Kunth) Chase appears in other Kew resources:

First published in Proc. Biol. Soc. Washington 24: 155 (1911)

Accepted by

  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

Literature

Kew Backbone Distributions

  • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

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 Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Science Photographs
Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/