Poaceae
Digitaria

Digitaria imbricata R.D.Webster

First published in Brunonia 6: 184 (1984)
This species is accepted
The native range of this species is Queensland. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

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]

Morphology General Habit
Perennial. Cataphylls evident. Rhizomes elongated. Culms erect; 30-50 cm long; 3-5 -noded. Culm-nodes bearded. Leaf-sheaths without keel; antrorsely scabrous; glabrous on surface, or puberulous; outer margin glabrous. Ligule an eciliate membrane; 0.3-1.1 mm long; erose; obtuse. Leaf-blades flat, or conduplicate; 2-7.5 cm long; 2.4-3.1 mm wide. Leaf-blade surface scabrous; glabrous, or hirsute.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 3-4; borne along a central axis; spreading; unilateral; 3-6.5 cm long; bearing 20-34 fertile spikelets on each. Central inflorescence axis 1.5-4 cm long. Rhachis narrowly winged; angular; 0.3-0.6 mm wide; scabrous on margins. Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels unequal; 0.4-0.8 mm long; scabrous; glabrous; tip cupuliform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2.4-2.8 mm long; 0.6-0.8 mm wide; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 2.4-2.8 mm long; 0.6-0.8 mm wide; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.1-0.4 mm long; 0.05-0.1 length of spikelet; membranous. Lower glume apex truncate, or obtuse. Upper glume lanceolate; 2.3-2.6 mm long; 0.8-0.9 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface villous. Upper glume margins ciliate. Upper glume apex acuminate.
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; prominently veined; pubescent; hairy between veins but central interspaces glabrous; acuminate. Fertile lemma lanceolate; 2.3-2.6 mm long; cartilaginous; much thinner on margins; without keel. Lemma surface reticulate. Lemma margins flat; covering most of palea. Lemma apex acuminate; muticous, or mucronate. Palea cartilaginous.
Distribution
Australasia: Australia.
Reference
Paniceae. Webster 1993.
[GB]

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

  • 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