Poaceae
Digitaria

Digitaria cuyabensis (Trin.) Parodi

First published in Physis (Buenos Aires) 8: 378 (1926)
This species is accepted
The native range of this species is Panama, Bolivia to Brazil and N. Argentina. It is an annual and grows primarily in the subtropical biome.

Descriptions

Morphology General Habit
Annual, or perennial; short-lived. Culms erect, or geniculately ascending; 50-100 cm long; 2.5-3 mm diam.; 6-8 -noded. Culm-nodes brown; glabrous, or pubescent. Leaf-sheaths 6-9 cm long; glabrous on surface, or pilose. Ligule an eciliate membrane; 2.5 mm long; erose. Leaf-blades 5-15 cm long; 3-5 mm wide. Leaf-blade surface glabrous, or pubescent. Leaf-blade margins scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 5-14; digitate; unilateral; 7-13 cm long; simple, or secondarily branched. Central inflorescence axis 3-5 cm long. Rhachis angular; scabrous on margins. Spikelets in pairs. Fertile spikelets pedicelled. Pedicels unequal; 0.9 mm long, or 3 mm long; scabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 2.9-3 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 2.9-3 mm long; 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; 2.8-2.9 mm long; 1 length of spikelet; membranous; without keels; 3-5 -veined. Upper glume surface puberulous; hairy between veins. 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; puberulous; hairy between veins but central interspaces glabrous; acute. Fertile lemma elliptic; 2.8 mm long; cartilaginous; much thinner on margins; without keel. Lemma margins flat; covering most of palea. Palea cartilaginous.
Morphology Reproductive morphology Flowers
Anthers 3; 1.5-1.8 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ovoid; 1.2-1.3 mm long.
Distribution
South America: Mesoamericana, northern South America, western South America, Brazil, and southern South America.
Reference
Paniceae. Fl Entre Rios 1995.
[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