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This species is accepted, and its native range is Tristan da Cunha.
A specimen from Kew's Herbarium

[GB]
Morphology General Habit
Perennial; caespitose; clumped densely. Butt sheaths coriaceous; persistent and investing base of culm. Culms erect; 12-48 cm long; 2 -noded. Culm-internodes smooth; distally glabrous. Lateral branches lacking. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 7-15 mm long; lacerate. Leaf-blades erect; flat, or convolute; 5-22 cm long; 2.5-6 mm wide; stiff; dark green, or glaucous. Leaf-blade surface ribbed; grooved adaxially; scaberulous; rough adaxially. Leaf-blade margins scaberulous. Leaf-blade apex abruptly acute, or acute; hardened.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; ovate; dense; equilateral, or nodding; 10-25 cm long; 2-3.5 cm wide; contracted about primary branches. Primary panicle branches 4-8 cm long; bearing spikelets almost to the base. Panicle axis hispidulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1-3.5 mm long; scabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 8-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite. Floret callus bearded. Floret callus hairs 2-3.5 mm long.
Fertile
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 8-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite. Floret callus bearded. Floret callus hairs 2-3.5 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; shiny; gaping. Lower glume lanceolate, or elliptic; 6.5-8.5 mm long; membranous; 1-keeled; 3 -veined. Lower glume primary vein scabrous. Lower glume lateral veins all falling short of apex. Lower glume apex acuminate. Upper glume lanceolate; 8-10 mm long; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong, or ovate; 4-5 mm long; membranous; shiny; without keel; 5-7 -veined. Lemma surface asperulous. Lemma apex dentate; 2 -fid; with lateral lobes bidentate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; straight; 6-6.5 mm long overall. Palea oblong; 3-4 mm long; 2 -veined. Palea keels ciliolate. Palea apex dentate; 2 -fid. Rhachilla extension pilose; with 1.5 mm long hairs.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 1-1.5 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp.
Distribution
Antarctic: Subantarctic islands.
Reference
Aveneae. Hubbard 1999.

Native to:

Tristan da Cunha

Deschampsia mejlandii C.E.Hubb. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Feb 1, 2004 Christophersen, E [1106], Tristan da Cunha K000307879 holotype
Jan 1, 1980 Wace, N.M. [170], Tristan da Cunha K000307873 paratype
Jan 1, 1980 Christophersen, E. [1106], Tristan da Cunha K000307878 holotype
Wace [T176], Tristan da Cunha K000298640
Malan [0009], Tristan da Cunha K000816381
McIntosh [0189], Tristan da Cunha K000816383
Wace, N.M. [346], Tristan da Cunha K000307874 paratype

First published in Bull. Brit. Mus. (Nat. Hist.), Bot. 8: 389 (1981)

Accepted by

  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

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 Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0