Poaceae
Digitaria

Digitaria hubbardii Henrard

First published in Monogr. Digitaria: 334 (1950)
This species is accepted
The native range of this species is S. Queensland to New South Wales. It is a perennial and grows primarily in the desert or dry shrubland biome.

Descriptions

Morphology General Habit
Perennial; caespitose. Butt sheaths villous. Culms erect, or geniculately ascending; 20-60 cm long; 3-10 -noded. Culm-nodes glabrous, or pubescent. Lateral branches ample. Leaf-sheaths antrorsely scabrous. Ligule an eciliate membrane; 1 mm long; truncate, or obtuse. Leaf-blades involute; 5-10 cm long; 1-2 mm wide. Leaf-blade surface pubescent; hairy abaxially. Leaf-blade apex attenuate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 3-4; borne along a central axis; spreading; unilateral; 2.5-8 cm long. Central inflorescence axis 1.5-4 cm long. Rhachis angular; scaberulous on margins. Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels unequal; 1 mm long, or 3-5 mm long; tip cupuliform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acute; 3-3.25 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; acute; 3-3.25 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate, or orbicular; 0.5 mm long; 0.15 length of spikelet; membranous. Lower glume apex obtuse. Upper glume lanceolate; 0.9 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface pilose. Upper glume hairs 1-1.5 mm long. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate, or ovate; 1 length of spikelet; membranous; 5-7 -veined; pilose; hairy between veins but central interspaces glabrous; with dorsal tufts of hair; 2 hair tufts in all; bearing hairs 1-1.5 mm long; acute. Fertile lemma elliptic; 2-2.5 mm long; cartilaginous; much thinner on margins; light brown; without keel. Lemma surface striate. Lemma margins flat; covering most of palea. Lemma apex apiculate. Palea cartilaginous.
Distribution
Australasia: Australia.
Reference
Paniceae. Fl NSW 1993.
[GB]

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

    • 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 2024. 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 2024. 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