Poaceae
Rosengurttia

Rosengurttia monandra (Hack.) L.N.Silva

First published in J. Syst. Evol. 60: 709 (2021)
This species is accepted
The native range of this species is Colombia to NW. Argentina, S. Brazil. It is a perennial and grows primarily in the subtropical biome. It is used as a medicine.

Descriptions

Morphology General Habit
Perennial; caespitose. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Culms erect; 30-50 cm long. Ligule an eciliate membrane; 1-1.5 mm long. Leaf-blades 7-15 cm long; 0.5-2 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; effuse; 6-10 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 4-7 fertile florets; with diminished florets at the apex. Spikelets oblong, or ovate; laterally compressed; 3.5-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas. Floret callus glabrous.
Fertile
Spikelets comprising 4-7 fertile florets; with diminished florets at the apex. Spikelets oblong, or ovate; laterally compressed; 3.5-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas. Floret callus glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume elliptic; 1.5-1.8 mm long; 0.7-0.8 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex obtuse. Upper glume ovate; 2-2.2 mm long; 0.9-1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume surface asperulous. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma obovate; 2-2.8 mm long; membranous; much thinner above; keeled; lightly keeled; 5 -veined. Lemma surface asperulous; rough above. Lemma margins ciliate; hairy below. Lemma apex obtuse. Palea 0.9 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; 0.4 mm long. Anthers 1; 0.2-1 mm long. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid; 1-1.6 mm long. Hilum punctiform.
Distribution
South America: western South America, Brazil, and southern South America.
Reference
Poeae. Mattei.
[GB]

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution
Colombia
[CPLC]

Distribution
Biogeografic region: Andean. Elevation range: 2500–3500 m a.s.l. Native to Colombia. Colombian departments: Antioquia, Caldas, Cauca, Nariño.
Habit
Herb.
Ecology
Habitat according IUCN Habitats Classification: forest and woodland, artificial - terrestrial.
[UPFC]

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: not threatened. Confidence: confident
[AERP]

Uses

Use Medicines
Medical uses.
[UPFC]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • Catálogo de Plantas y Líquenes de Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Colombian resources for Plants made Accessible

    • ColPlantA 2021. Published on the Internet at http://colplanta.org
    • https://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/

  • 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

  • Useful Plants and Fungi of Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0