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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. Basal innovations intravaginal. Culms erect; 15-40 cm long; 2 -noded. Lateral branches lacking. Leaf-sheaths mostly shorter than adjacent culm internode; smooth; glabrous on surface. Ligule an eciliate membrane; 2-5 mm long; acute. Leaf-blades erect; filiform; involute, or convolute; 5-20 cm long; 2-2.5 mm wide; stiff. Leaf-blade surface ribbed; grooved adaxially; smooth; glabrous. Leaf-blade apex abruptly acute, or acute; muticous, or pungent; hardened.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; lanceolate, or oblong; 7-15 cm long; 1-2 cm wide. Primary panicle branches appressed, or ascending; 3-6 cm long. Panicle axis hispidulous. Panicle branches glabrous, or hispidulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.5-4 mm long; smooth, or scaberulous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 7.5-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite. Floret callus bearded. Floret callus hairs 2-2.5 mm long.
Fertile
Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 7.5-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite. Floret callus bearded. Floret callus hairs 2-2.5 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; exceeding apex of florets; shiny; gaping. Lower glume lanceolate, or elliptic; 7.5-10 mm long; chartaceous; much thinner on margins; 1-keeled; 1-3 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent, or obscure. Lower glume apex acute. Upper glume elliptic; 7.5-9 mm long; chartaceous; with hyaline margins; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins all falling short of apex. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong, or ovate; 4.5-6 mm long; membranous; shiny; without keel; 5-7 -veined. Lemma surface smooth, or asperulous; rough above. Lemma apex dentate; 2 -fid; with lateral lobes bidentate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33 way up back of lemma; geniculate; 6-8 mm long overall; with a straight or slightly twisted column. Palea oblong; 1 length of lemma; 2 -veined. Palea keels ciliolate. Palea apex dentate; 2 -fid. Rhachilla extension pilose.
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 christophersenii C.E.Hubb. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
McIntosh [0197], Tristan da Cunha K000816388
McIntosh [0196], Tristan da Cunha K000816389
Malan [0007], Tristan da Cunha K000816387

First published in Bull. Brit. Mus. (Nat. Hist.), Bot. 8: 388 (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