Poaceae
Agrostis

Agrostis goughensis C.E.Hubb.

First published in Bull. Brit. Mus. (Nat. Hist.), Bot. 8: 379 (1981)
This species is accepted
The native range of this species is Tristan da Cunda (Inaccessable Island, Gough Island). It is a perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Perennial; mat forming. Stolons present. Culms decumbent; 40-80 cm long; 3-7 -noded; rooting from lower nodes. Culm-internodes terete; smooth; distally glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; smooth; glabrous on surface. Ligule an eciliate membrane; 5-10 mm long; obtuse. Leaf-blades 1-10 cm long; 3-6 mm wide. Leaf-blade surface ribbed; grooved adaxially; scaberulous; rough adaxially. Leaf-blade margins scaberulous. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; oblong; 10-23 cm long; 1-3 cm wide; contracted about primary branches. Primary panicle branches spreading; 2-5 cm long; bearing spikelets almost to the base. Panicle axis scabrous. Panicle branches capillary. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; terete; 1-4 mm long; scaberulous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 4-4.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.2-0.5 mm long.
Fertile
Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 4-4.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.2-0.5 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; with lower wider than upper; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 4-4.5 mm long; 1-1.1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 4-4.5 mm long; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong, or ovate; 2-2.3 mm long; hyaline; without keel; 5 -veined. Lemma surface pubescent. Lemma apex obtuse; awned; 1 -awned. Principal lemma awn dorsal; arising 0.66 way up back of lemma; straight; 1-2.5 mm long overall. Palea oblong; 1 mm long; 0.25 length of lemma; hyaline; 2 -veined. Palea apex obtuse.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 0.8-1 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Antarctic: Subantarctic islands.
Reference
Aveneae. CEH 1999.
[GB]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/43911/10836474

Conservation
DD - data deficient
[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

  • 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