Poaceae
Eragrostis

Eragrostis anomala (C.E.Hubb.) R.L.Barrett & P.M.Peterson

First published in Austral. Syst. Bot. 33: 469 (2020)
This species is accepted
The native range of this species is N. Queensland. It is an annual and grows primarily in the seasonally dry tropical biome.

Descriptions

Morphology General Habit
Annual. Culms erect, or geniculately ascending; 10-30 cm long; 2 -noded. Leaf-sheaths glabrous on surface, or pilose. Ligule a fringe of hairs. Leaf-blades convolute; 3-10 cm long; 2-3 mm wide; stiff. Leaf-blade surface glabrous, or pilose; moderately hairy.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle contracted; interrupted; 2-10 cm long; contracted about primary branches. Primary panicle branches spreading; 1-2 cm long; bearing spikelets almost to the base. Panicle branches pilose. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; ciliate.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 6-9 mm long; 2-3 mm wide; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes zig-zag.
Fertile
Spikelets comprising 2-4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 6-9 mm long; 2-3 mm wide; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes zig-zag.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes deciduous; similar; shorter than spikelet. Lower glume ovate; 2.5-3 mm long; 0.8-0.9 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex obtuse, or acute. Upper glume ovate; 3-3.3 mm long; 0.6-0.8 length of adjacent fertile lemma; membranous; 1-keeled; 1-3 -veined. Upper glume primary vein scaberulous. Upper glume margins ciliolate. Upper glume apex obtuse, or acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma elliptic; lanceolate in profile; 3.5-5.5 mm long; coriaceous; keeled; 3 -veined. Lemma midvein scabrous. Lemma surface asperulous. Lemma apex acuminate, or setaceously attenuate. Palea bowed outwards; 0.4-0.6 length of lemma; 2 -veined. Palea keels winged; narrowly winged; ciliolate. Apical sterile florets 4-6 in number; barren; separate; lanceolate; 3.5-5.5 mm long.
Morphology Reproductive morphology Flowers
Lodicules 2; cuneate; fleshy. Anthers 3; 0.4 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ovoid; 1 mm long.
Distribution
Australasia: Australia.
Reference
Eragrostideae. CEH.
[GB]

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

  • 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 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