Poaceae
Agrostis

Agrostis glabra (J.Presl) Kunth

First published in Enum. Pl. 1: 226 (1833)
This species is accepted
The native range of this species is Chile to W. Argentina. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; culms solitary. Rhizomes short, or elongated. Culms erect; 25-70 cm long; 2-4 -noded. Culm-nodes brown. Leaves cauline. Leaf-sheaths 2.5-20 cm long; smooth, or scaberulous. Ligule an eciliate membrane; 3-10 mm long; scaberulous on abaxial surface; erose. Leaf-blades 2.5-15 cm long; 1.5-5 mm wide. Leaf-blade surface scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; oblong; nodding; 8-28 cm long. Primary panicle branches 2-5 -nate. Panicle axis 5-7 noded. Panicle branches flexuous; scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous; puberulous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2.6-3.1 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.33-0.5 length of lemma.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2.6-3.1 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.33-0.5 length of lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2.6-3.1 mm long; 1.5-1.6 length of adjacent fertile lemma; membranous; purple; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; 1.6-2 mm long; hyaline; without keel; 5 -veined. Lemma apex erose; truncate; muticous, or mucronate. Principal lemma awn dorsal. Palea absent or minute.
Morphology Reproductive morphology Flowers
Lodicules 2; 0.4-0.5 mm long; membranous. Anthers 3; 1.2-1.8 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp. Hilum linear.
Distribution
South America: southern South America.
Reference
Aveneae. Fl Pat 1995.
[GB]

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/

  • 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