Poaceae
Mesosetum

Mesosetum ferrugineum (Trin.) Chase

First published in Proc. Biol. Soc. Washington 24: 122 (1911)
This species is accepted
The native range of this species is Brazil. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Butt sheaths villous. Culms erect; slender; 15-75 cm long. Culm-nodes glabrous, or pubescent, or bearded. Leaf-sheaths glabrous on surface, or pilose; outer margin hairy. Ligule a fringe of hairs; 1-3 mm long. Leaf-blades filiform, or linear; (4-)6-12(-28) cm long; (1-)3-5(-7) mm wide. Leaf-blade surface glabrous to pilose; hairy on both sides. Leaf-blade margins unthickened, or cartilaginous; scabrous. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1; single; unilateral; 3-13 cm long. Rhachis angular; puberulous on surface. Spikelet packing adaxial; regular; 2 -rowed. Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong; 1 mm long; glabrous, or ciliate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 3.8-7 mm long; falling entire. Spikelet callus pubescent.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 3.8-7 mm long; falling entire. Spikelet callus pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 3.8-4.8 mm long; 0.7-1 length of spikelet; chartaceous; 1-keeled; 3 -veined. Lower glume margins ciliate, or tuberculately ciliate. Lower glume hairs red; 2-3 mm long. Lower glume apex acute. Upper glume lanceolate; 3-7 mm long; 0.7-1 length of spikelet; membranous; without keels; 5-7 -veined. Upper glume surface pilose. Upper glume margins ciliate. Upper glume hairs red; 2 mm long. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; 1 length of spikelet; membranous; 3-5 -veined; with veins transversely connected at apex; scabrous; rough above; ciliate on margins; bearing red hairs; bearing hairs 3 mm long; acute. Fertile lemma ovate; dorsally compressed; 4-5 mm long; coriaceous; without keel; 5 -veined. Lemma margins flat. Lemma apex acute; pubescent. Palea coriaceous; without keels.
Morphology Reproductive morphology Flowers
Anthers 3; purple.
Morphology Reproductive morphology Fruits
Caryopsis 3-3.5 mm long. Hilum linear; 1 length of caryopsis.
Distribution
South America: Brazil.
Reference
Paniceae. Filgueiras.
[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: not threatened. Confidence: confident
[AERP]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/44393645/44424341

Conservation
LC - least concern
[IUCN]

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/

  • 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 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

  • 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

  • Neotropikey

    • Milliken, W., Klitgard, B. and Baracat, A. (2009 onwards), Neotropikey - Interactive key and information resources for flowering plants of the Neotropics.
    • http://creativecommons.org/licenses/by/3.0