Trisetaria parviflora (Desf.) Maire

First published in Bull. Soc. Hist. Nat. Afrique N. 33: 92 (1942)
This species is accepted
The native range of this species is Central Medit. It is an annual and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Annual; culms solitary. Culms erect, or geniculately ascending; 30-80 cm long. Leaf-sheaths without keel; pilose. Ligule an eciliate membrane; 2 mm long; lacerate; truncate. Leaf-blades 7-15 cm long; 2-5 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface pilose; hairy on both sides. Leaf-blade margins scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; 10-25 cm long. Panicle axis glabrous. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets cuneate; laterally compressed; 2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes scaberulous; glabrous. Floret callus glabrous.
Fertile
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets cuneate; laterally compressed; 2-2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes scaberulous; glabrous. Floret callus glabrous.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; dissimilar; exceeding apex of florets; thinner than fertile lemma; shiny; gaping. Lower glume linear; 1.2-1.4 mm long; 0.5-0.6 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein smooth. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2-2.5 mm long; 1-1.1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein smooth. Upper glume apex acute; mucronate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 2 mm long; membranous; shiny; without keel; 3 -veined. Lemma midvein scaberulous. Lemma lateral veins obscure. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn subapical; straight, or geniculate; 4 mm long overall; without a column, or with a straight or slightly twisted column. Palea gaping; linear; hyaline. Palea keels scabrous. Palea apex dentate; 2 -fid.
Morphology Reproductive morphology Flowers
Anthers 3; 1.5 mm long. Ovary glabrous.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum punctiform.
Distribution
Europe: southwestern and southeastern. Africa: north.
Reference
Aveneae. Fl Afr N 1993.
[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]

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 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