Poaceae
Agrostis

Agrostis leptotricha É.Desv.

First published in C.Gay, Fl. Chil. 6: 316 (1854)
This species is accepted
The native range of this species is Central & S. Chile to S. Argentina. It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Rhizomes absent, or short. Culms 20-50 cm long. Ligule an eciliate membrane; 3-4 mm long; lacerate. Leaf-blades 1-2.5 mm wide. Leaf-blade surface scaberulous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; oblong; nodding; 9-20 cm long. Primary panicle branches appressed, or ascending. Panicle branches capillary. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous; tip widened.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2-3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus sparsely hairy.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2-3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus sparsely hairy.
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; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2-3.5 mm long; 1.3-1.6 length of adjacent fertile lemma; membranous; 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 ovate; 1.5-2.2 mm long; hyaline; without keel; 5 -veined. Lemma apex truncate; mucronate, or awned; 1 -awned. Principal lemma awn dorsal; arising 0.66-0.75 way up back of lemma; straight; 0.2-1 mm long overall. Palea absent or minute.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 0.8-1.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ovoid. 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