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Monachather paradoxus Steud.

Common name
Bandicoot Grass
Mulga Oats

Derivation
Monachather Steud., Syn. Pl. Glumac. 247 (1854); from the Greek monarchos (solitary) and ather (spike as in an ear of wheat), referring to the solitary wheat-like spike.

paradoxus- from the Greek para (irregular) and doxa (opinion). Different from the expected in regard to related species.

Published in
Syn. Pl. Glumac. 1: 247 (1854).

Common synonyms
Danthonia bipartita F.Muell.

 

Habit
Perennial, tufted. Basal leaf sheaths thickened and forming a bulb, woolly. Culms erect, 25–70 cm tall. Leaves mostly basal. Ligule a fringed membrane, 1–3 mm long. Leaf-blades 7–16 cm long, 2–5 mm wide. Leaf-blade surface pilose, with tubercle-based hairs.

Inflorescence
Inflorescence compound, a panicle, comprising 8–25 fertile spikelets. Panicle open or contracted, linear, effuse, 5–20 cm long, 2 cm wide.

Spikelets
Spikelets solitary. Fertile spikelets many flowered, comprising 5–6 fertile florets, with diminished florets at the apex, cuneate, laterally compressed, 8–17 mm long, breaking up at maturity. Spikelets disarticulating below each fertile floret. Floret callus bearded, hairs 25% of length of lemma.

Glumes
Glumes persistent, similar, thinner than fertile lemma, gaping. Lower glume ovate, 8–17 mm long, equalling upper glume, chartaceous, 11–13-nerved. Lower glume apex acute. Upper glume ovate, 8–17 mm long, 110% of length of adjacent fertile lemma, chartaceous, 11–13-nerved. Upper glume apex acute.

Florets
Fertile lemma oblong, 2–15 mm long, coriaceous, 9-nerved. Lemma surface pilose or villous, with a transverse fringe of hair. Lemma apex lobed, 2-fid, with linear lobes, with lobes 3–8.4 mm long, attenuate, incised 66% of lemma length,1-awned. Median (principal) awn from a sinus, 3.2–7.8 mm long overall, not or scarcely exserted from spikelet. Palea elliptic or ovate, 2.7–3.5 mm long, 33% of length of lemma, coriaceous, 0-nerved, without keels. Palea surface glabrous. Apical sterile florets resembling fertile though underdeveloped. Lodicules 2, smooth. Anthers 3, 0.25–2.8 mm long. Grain with adherent pericarp, 1.2–1.8 mm long. Hilum linear, 25% of length of caryopsis.


Continental Distribution:
Australasia.

Australian Distribution:
Western Australia, Northern Territory, South Australia, Queensland, New South Wales.

Western Australia: Giles, Helms, Fortescue, Ashburton, Carnarvon, Austin, Irwin, Drummond, Dale, Avon, Coolgardie. Northern Territory: Central Australia North, Central Australia South. South Australia: North-western, Lake Eyre, Nullabor, Gairdner-Torrens Basin, Eastern, Eyre Peninsula. Queensland: Darling Downs, Gregory South, Mitchell, Warrego, Maranoa. New South Wales: North-Western Plains, South-Western Plains, North Far Western Plains.

Classification. (GPWG 2001):
Danthonioideae

Notes
Native. Arid grasslands, often reported from sand, usually as a minor element with mulga, naked woollybutt, and hard or feathertop spinifex. Flowers May to Sep.


Images
Illustrations available:
Habit (photo)
Inflorescence (photo)
Habit and details (line drawing)
Habit and details (line drawing)
Lemma and paleas (line drawing)
Australian distribution



Habit (photo)
© D. Albrecht


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Inflorescence (photo)
© D. Albrecht


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Habit and details (line drawing)
© Australian Biological Resources Study
drawing by Enid Mayfield


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Habit and details (line drawing)
© Gardner 1952


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Lemma and paleas (line drawing)
© Vickery 1956


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Australian Distribution
© ABRS


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