Poaceae
Plagiantha

Plagiantha tenella Renvoize

First published in Kew Bull. 37: 323 (1982)
This species is accepted
The native range of this species is Brazil (Bahia). It is an annual and grows primarily in the seasonally dry tropical biome.

Descriptions

Morphology General Habit
Annual; caespitose. Culms erect, or decumbent; 30-80 cm long; rooting from lower nodes. Ligule a ciliolate membrane. Leaf-blade base broadly rounded. Leaf-blades lanceolate; 5-10 cm long; 3-7 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; 5-8 cm long. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; tilted on the pedicel; dorsally compressed; 2.2-2.8 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; tilted on the pedicel; dorsally compressed; 2.2-2.8 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume oblate; 0.33 length of spikelet; membranous; without keels; 3(-5) -veined. Lower glume apex obtuse. Upper glume ovate; 0.8 length of adjacent fertile lemma; membranous; without keels; 5 -veined. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; with palea. Lemma of lower sterile floret oblong; 1 length of spikelet; membranous; 2-keeled; 2(-4) -veined; sulcate; obtuse. Palea of lower sterile floret becoming indurate on flanks at maturity. Fertile lemma ovate; 2.2-2.8 mm long; coriaceous; without keel. Lemma margins involute. Lemma apex acute. Palea coriaceous.
Distribution
South America: Brazil.
Reference
Paniceae. WDC.
[GB]

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]

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 Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. 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

  • World Checklist of Vascular plants (WCVP)

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. 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