Digitaria bicornis (Lam.) Roem. & Schult.

First published in Syst. Veg. ed. 15[bis]. 2: 470 (1817)
This species is accepted
The native range of this species is W. Indian Ocean, Tropical & Subtropical Asia to N. Australia. It is an annual or perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

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
Naturalizada y adventicia en Colombia; Alt. 0 - 2000 m.; Amazonia, Andes, Guayana y Serranía de La Macarena, Islas Caribeñas, Llanura del Caribe, Orinoquia, Pacífico, Sierra Nevada de Santa Marta, Valle del Cauca, Valle del Magdalena.
Morphology General Habit
Hierba
Conservation
No Evaluada
[CPLC]

Bernal, R., G. Galeano, A. Rodríguez, H. Sarmiento y M. Gutiérrez. 2017. Nombres Comunes de las Plantas de Colombia. http://www.biovirtual.unal.edu.co/nombrescomunes/

Vernacular
coneja, gaudín, guaduín, guardarrocío, guardarrocío colchado
[UNAL]

Morphology General Habit
Annual. Culms decumbent; 20-45 cm long; without nodal roots, or rooting from lower nodes. Leaf-sheaths glabrous on surface, or pilose; with tubercle-based hairs. Ligule an eciliate membrane; 2 mm long; truncate. Leaf-blades elliptic; 1-12 cm long; 2-8 mm wide. Leaf-blade surface scaberulous; rough on both sides; pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade margins unthickened, or cartilaginous; undulate; scabrous. Leaf-blade apex acute.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 2-4; paired, or digitate; straight; unilateral; 5-10 cm long. Rhachis narrowly winged; angular; scabrous on margins. Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster; heteromorphic (lower almost glabrous). Pedicels scabrous.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 3 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 3 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes two. Lower glume ovate; 0.2-0.5 mm long; 0.1 length of spikelet. Lower glume apex obtuse. Upper glume lanceolate; 0.66 length of spikelet; membranous; 3 -veined. Upper glume surface glabrous. Upper glume margins ciliate, or setose. 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; 5 -veined; with thickened veins; ribbed; pilose, or setose (upper spikelet); hairy between veins but central interspaces glabrous; ciliate on margins; acute. Fertile lemma elliptic; 3 mm long; cartilaginous; much thinner on margins; light brown; without keel; 3 -veined. Lemma surface smooth. Lemma margins flat; covering most of palea. Lemma apex acute. Palea cartilaginous.
Morphology Reproductive morphology Flowers
Anthers 3; 0.5-1 mm long.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid; 2-2.5 mm long. Embryo 0.5 length of caryopsis. Hilum punctiform.
Distribution
Africa: north and western Indian ocean. Asia-temperate: China and eastern Asia. Asia-tropical: India, Indo-China, Malesia, and Papuasia. Australasia: Australia. Pacific: southwestern, northwestern, and north-central. North America: Mexico. South America: Mesoamericana, western South America, Brazil, and southern South America.
Reference
Paniceae. Bor 1993.
[GB]

Distribution
Biogeografic region: Amazonia, Andean, Guiana Shield, Caribbean, Orinoquia, Pacific. Elevation range: 0–2000 m a.s.l. Naturalised in Colombia. Colombian departments: Antioquia, Arauca, Atlántico, Bolívar, Caldas, Casanare, Chocó, Córdoba, Cundinamarca, Guaviare, Huila, La Guajira, Magdalena, Meta, Norte de Santander, Risaralda, San Andrés y Providencia, Santander, Sucre, Tolima, Valle del Cauca, Vaupés, Vichada.
Habit
Herb.
Ecology
Habitat according IUCN Habitats Classification: forest and woodland, savanna, shrubland, native grassland, wetlands (inland), artificial - terrestrial.
[UPFC]

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

    • 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
  • Kew Science Photographs

    • Copyright applied to individual images
  • Universidad Nacional de Colombia

    • ColPlantA database
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Useful Plants and Fungi of Colombia

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