Poaceae
Danthonia

Danthonia holm-nielsenii Laegaard

First published in Fl. Ecuador 57: 17 (1997)
This species is accepted
The native range of this species is Ecuador. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/45946/11026478

Conservation
VU - vulnerable
[IUCN]

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 densely. Butt sheaths glossy; glabrous. Culms slender; 25 cm long. Leaf-sheaths mostly shorter than adjacent culm internode; pilose. Leaf-sheath oral hairs ciliate; 1-1.5 mm long. Ligule a fringe of hairs; 0.3-0.5 mm long. Leaf-blades filiform; involute; 3-5 cm long; 1.5 mm wide. Leaf-blade surface ribbed; hispid; hairy adaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate, or elliptic; 5 cm long. Primary panicle branches 1 -nate. Panicle branches pilose. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 7-8 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 15-17 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.8 mm long; pubescent. Floret callus hairs 0.2-0.4 mm long.
Fertile
Spikelets comprising 7-8 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 15-17 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.8 mm long; pubescent. Floret callus hairs 0.2-0.4 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate; 15-17 mm long; 1 length of upper glume; membranous; without keels; 3-5 -veined. Lower glume lateral veins obscure. Lower glume apex acuminate. Upper glume lanceolate; 15-17 mm long; 3 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume lateral veins obscure. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic to ovate; 5-6 mm long; chartaceous; without keel; 5 -veined. Lemma apex lobed; 2 -fid; with lobes 2-3 mm long; incised 0.5 of lemma length; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; flat below; 10-12 mm long overall; with twisted column. Column of lemma awn 2 mm long. Lateral lemma awns arising on apex of lobes; 4-5 mm long; shorter than principal. Palea 3 mm long; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; cuneate; fleshy; glabrous. Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum linear.
Morphology Reproductive morphology Flowers Cleistogene
Cleistogenes present; in lower sheaths.
Distribution
South America: western South America.
Reference
Arundineae. Laegaard 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

  • Herbarium Catalogue Specimens

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • 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