Poaceae
Digitaria

Digitaria dioica Killeen & Rúgolo

First published in Syst. Bot. 17: 603 (1992)
This species is accepted
The native range of this species is W. South. America to W. Central Brazil. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

Distribution
Biogeografic region: Guiana Shield, Orinoquia. Elevation range: 0–500 m a.s.l. Native to Colombia. Colombian departments: Guaviare, Meta, Vichada.
Habit
Herb.
Conservation
IUCN Red List Assessment (2021): LC.
Ecology
Habitat according IUCN Habitats Classification: forest and woodland, shrubland, native grassland.
[UPFC]

Morphology General Habit
Perennial; caespitose. Butt sheaths thickened and forming a bulb; pilose; persistent and investing base of culm; with fibrous dead sheaths. Culms erect; 45-85(-100) cm long. Leaves mostly basal. Ligule an eciliate membrane. Leaf-blades flat, or involute; 10-60 cm long; 2-4(-7) mm wide. Leaf-blade surface glabrous, or pubescent. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Dioecious. Inflorescence composed of racemes. Racemes 3-8; digitate, or borne along a central axis; unilateral; 3-12(-23) cm long; with branchlets at base of longer racemes; secondary branches racemulose (1-2cm). Central inflorescence axis 2-15 cm long. Rhachis angular. Spikelets clustered at each node. Fertile spikelets pedicelled; 3-10 in the cluster. Pedicels unequal. Male inflorescence similar to female. Male spikelets resembling female.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.8-3.8 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.8-3.8 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes two; dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume oblate; 0.5 mm long; 0.15 length of spikelet; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex truncate. Upper glume lanceolate; 0.5-0.75 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface pilose. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 1 length of spikelet; membranous; 5-7 -veined; pilose; acuminate. Fertile florets female. Fertile lemma lanceolate; 2.5-3.5 mm long; cartilaginous; much thinner on margins; yellow; without keel. Lemma margins flat; covering most of palea. Lemma apex acute. Palea cartilaginous.
sex Male
Male inflorescence similar to female. Male spikelets resembling female.
Distribution
South America: western South America and Brazil.
Reference
Paniceae. Gr Bolivia 1997.
[GB]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/122101349/122105035

Conservation
LC - least concern
[IUCN]

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution
Nativa en Colombia; Alt. 0 - 500 m.; Guayana y Serranía de La Macarena, Orinoquia.
Morphology General Habit
Hierba
Conservation
No Evaluada
[CPLC]

Uses

Use Gene Sources
Used as gene sources.
[UPFC]

Sources

  • Catálogo de Plantas y Líquenes de Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Colombian resources for Plants made Accessible

    • ColPlantA 2021. Published on the Internet at http://colplanta.org
    • http://creativecommons.org/licenses/by/3.0/

  • 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/

  • 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 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

  • Useful Plants and Fungi of Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0