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This genus is accepted, and its native range is SE. Australia.
A specimen from Kew's Herbarium

[GB]

nonem

Morphology General Habit
Perennial. Culms erect (1/2), or decumbent (1/2); 25-39.16-60 cm long. Ligule a fringe of hairs. Leaf-blades filiform.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2 fertile florets (1), or 3 fertile florets, or 4-5 fertile florets (1); without rhachilla extension, or with a barren rhachilla extension (1). Spikelets oblong; laterally compressed; 4-6.5-9 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 2 fertile florets (1), or 3 fertile florets, or 4-5 fertile florets (1); without rhachilla extension, or with a barren rhachilla extension (1). Spikelets oblong; laterally compressed; 4-6.5-9 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet (1), or reaching apex of florets (2), or exceeding apex of florets (1); gaping. Lower glume lanceolate; 1 length of upper glume; chartaceous; 1-keeled; 1-2 -veined (1), or 3 -veined. Lower glume surface smooth (1), or asperulous. Lower glume apex obtuse (1), or acute. Upper glume lanceolate; 1.3-1.7-2.2 length of adjacent fertile lemma; chartaceous; 1-keeled; 1-2 -veined (1), or 3 -veined. Upper glume surface smooth (1), or asperulous. Upper glume apex obtuse (1), or acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; chartaceous; much thinner above; of similar consistency on margins (2), or much thinner on margins (1); without keel; 9 -veined. Lemma surface pubescent (2), or pilose (1); hairy between veins. Lemma apex dentate (1), or lobed (2); 2 -fid; incised 0.25-0.375-0.5 of lemma length; obtuse (2/2), or acute (2/2); muticous (1), or mucronate (1), or awned (2); 1 -awned (2/2). Principal lemma awn apical (1), or from a sinus (2); straight (1), or curved (1), or geniculate (1). Palea 0.9-1-1.1 length of lemma; chartaceous; 2 -veined. Palea keels smooth (1), or scaberulous (2); eciliate (2), or ciliolate (1). Palea surface pubescent (2), or pilose (1).
Morphology Reproductive morphology Flowers
Lodicules 2; fleshy. Anthers 3.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid (1/1). Hilum linear; 0.5 length of caryopsis.
Distribution
Australasia.

Native to:

New South Wales, Victoria

Plinthanthesis Steud. appears in other Kew resources:

First published in Syn. Pl. Glumac. 1: 14 (1853)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

GrassBase - The Online World Grass Flora
http://creativecommons.org/licenses/by-nc-sa/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