Poaceae
Deschampsia

Deschampsia teretifolia (Laegaard) Romasch., P.M.Peterson, Soreng & Barberá

First published in Phytoneuron 2019-39: 10 (2019)
This species is accepted
The native range of this species is Central Ecuador. It is a perennial and grows primarily in the montane tropical 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]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/45940/11026252

Conservation
VU - vulnerable
[IUCN]

Morphology General Habit
Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms 15-30 cm long; 0.7-1 mm diam. Culm-internodes striate; distally glabrous. Leaves mostly basal. Leaf-sheaths striately veined; glabrous on surface. Ligule an eciliate membrane; 6-10 mm long; acute. Leaf-blades aciculate; involute; 3-5 cm long; 0.5-0.8 mm wide; stiff. Leaf-blade surface glabrous. Leaf-blade apex obtuse.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; linear; interrupted; 5-6 cm long; 1 cm wide. Primary panicle branches appressed; bearing spikelets almost to the base. Panicle axis with scattered hairs. Panicle branches with scattered hairs. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus 0.5 mm long; pilose; disarticulating obliquely. Floret callus hairs 1-2 mm long.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus 0.5 mm long; pilose; disarticulating obliquely. Floret callus hairs 1-2 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny. Lower glume lanceolate; 1 length of upper glume; membranous; much thinner on margins; purple; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex erose; acute. Upper glume lanceolate; 6 mm long; 1.7 length of adjacent fertile lemma; membranous; with membranous margins; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex erose; acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 3.5 mm long; membranous; shiny; without keel; 3 -veined. Lemma surface smooth; glabrous. Lemma apex erose; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; straight; 4 mm long overall. Palea 2.3 mm long. Rhachilla extension 2 mm long; pilose; with 1-2 mm long hairs.
Morphology Reproductive morphology Flowers
Lodicules 2. Anthers 3; 1.2 mm long. Stigmas 2.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Disseminule comprising a floret.
Distribution
South America: western South America.
Reference
Aveneae. 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

  • 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 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