Poaceae
Digitaria

Digitaria induta Swallen

First published in Contr. U.S. Natl. Herb. 29: 266 (1948)
This species is accepted
The native range of this species is NE. Brazil. It is an annual and grows primarily in the seasonally dry tropical biome.

Descriptions

Morphology General Habit
Annual. Culms erect; 24-30 cm long. Lateral branches sparse; arising from lower culm. Leaf-sheaths longer than adjacent culm internode; pilose; with tubercle-based hairs. Ligule a ciliolate membrane; 0.8 mm long. Leaf-blades 5-13.5 cm long; 3-6 mm wide. Leaf-blade surface hirsute; densely hairy; hairy on both sides. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 3; digitate; ascending; unilateral; 5.5-8 cm long. Rhachis angular; 0.3 mm wide; pilose on surface; scabrous on margins. Spikelets in threes. Fertile spikelets pedicelled. Pedicels unequal.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.6-2 mm long; with hairs extending 0.5 mm beyond apex; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.6-2 mm long; with hairs extending 0.5 mm beyond apex; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes one the lower absent or obscure; reaching apex of florets; thinner than fertile lemma. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume surface hispid; hairy between veins. Upper glume hairs red.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 0.9 length of spikelet; membranous; 3 -veined; pubescent; hairy between veins but central interspaces glabrous. Fertile lemma elliptic; 2 mm long; cartilaginous; much thinner on margins; light brown; without keel. Lemma surface striate. Lemma margins flat; covering most of palea. Lemma apex acute. Palea cartilaginous.
Distribution
South America: Brazil.
Reference
Paniceae. Swallen 2004.
[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: 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

  • 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