Poaceae
Agrostis

Agrostis isopholis C.E.Hubb.

First published in Bull. Misc. Inform. Kew 1936: 303 (1936)
This species is accepted
The native range of this species is Rwanda. It is a perennial and grows primarily in the montane tropical biome.

Descriptions

Morphology General Habit
Perennial. Culms geniculately ascending; 30-45 cm long; 3-4 -noded; with 0.3-0.4 of their length below uppermost node. Culm-nodes glabrous. Lateral branches lacking, or sparse. Leaf-sheaths smooth. Ligule an eciliate membrane; 2-3 mm long; obtuse. Leaf-blades flat, or involute; 5-10 cm long; 1-1.5 mm wide. Leaf-blade surface smooth, or scaberulous; rough adaxially. Leaf-blade margins scaberulous. Leaf-blade apex attenuate; filiform.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; oblong; 7-17 cm long. Primary panicle branches 3-5 cm long. Panicle branches capillary; flexuous; smooth. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2-4 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets elliptic, or oblong; laterally compressed; 2.5-3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
Fertile
Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets elliptic, or oblong; laterally compressed; 2.5-3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 2.5-3 mm long; 1 length of upper glume; membranous; glandular (minutely on veins); 1-keeled; 3 -veined. Lower glume primary vein scaberulous. Lower glume apex acute. Upper glume lanceolate; 2.5-3 mm long; 1 length of adjacent fertile lemma; membranous; glandular (minutely on veins); 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong, or ovate; 2.5-3 mm long; cartilaginous; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma surface asperulous; pilose; hairy below. Lemma apex truncate; muticous, or awned; 1 -awned. Principal lemma awn dorsal; arising 0.5-0.6 way up back of lemma; straight; 1-2.5 mm long overall. Palea 1.5 mm long; 0.5-0.6 length of lemma; hyaline; 2 -veined. Rhachilla extension 0.3-0.5 mm long; pubescent.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 1 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum linear.
Distribution
Africa: west-central tropical.
Reference
Aveneae. FTA.
[GB]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/97242440/97242445

Conservation
LC - least concern
[IUCN]

Sources

  • 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 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 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 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0