Poaceae
Digitaria

Digitaria junghuhniana (Nees ex Steud.) Henrard

First published in Meded. Rijks-Herb. 61: 11 (1930)
This species is accepted
The native range of this species is Malesia to New Guinea. It is an annual and grows primarily in the wet tropical biome.

Descriptions

Morphology General Habit
Annual; caespitose. Cataphylls inconspicuous. Culms decumbent; 25-50 cm long; rooting from lower nodes. Leaf-sheaths pilose. Ligule an eciliate membrane; 1.5-4 mm long; erose; truncate. Leaf-blades linear, or lanceolate; 1.5-19 cm long; 3-10 mm wide. Leaf-blade surface pilose; sparsely hairy, or moderately hairy.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 4-19; borne along a central axis; unilateral; 1.5-13 cm long; simple, or with branchlets at base of longer racemes. Central inflorescence axis 1-9 cm long. Rhachis angular; scabrous on margins. Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels tip discoid, or cupuliform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2.25-3.25 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2.25-3.25 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes one the lower absent or obscure, or two; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0-0.2 mm long; 0-0.1 length of spikelet; membranous; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse, or acute. Upper glume elliptic; 0.5-1.75 mm long; 0.4-0.6 length of spikelet; membranous; without keels; 3(-5) -veined. Upper glume surface glabrous. Upper glume margins pubescent. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; 7 -veined; with unevenly spaced veins; pubescent; acute. Fertile lemma elliptic; 2-3 mm long; cartilaginous; much thinner on margins; dark brown; without keel. Lemma margins flat; covering most of palea. Lemma apex acute. Palea cartilaginous.
Morphology Reproductive morphology Flowers
Anthers 3; 0.6-0.65 mm long; purple.
Distribution
Asia-tropical: Malesia.
Reference
Paniceae. Veldkamp 1993.
[GB]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/44392295/44441689

Conservation
LC - least concern
[IUCN]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • 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

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 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 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0