Ageratum houstonianum Mill.

First published in Gard. Dict. ed. 8.: n.° 2 (1768)
This species is accepted
The native range of this species is Mexico to Central America. It is an annual or perennial and grows primarily in the subtropical biome. It is used to treat unspecified medicinal disorders, has environmental uses and as a medicine.


Biogeografic region: Andean. Elevation range: 1300–2625 m a.s.l. Naturalised in Colombia. Colombian departments: Antioquia, Bogotá DC, Boyacá, Cauca, Chocó, Cundinamarca, Huila, Magdalena, Nariño, Norte de Santander, Santander, Valle del Cauca.
Herb, Shrub, Subshrub.
Habitat according IUCN Habitats Classification: forest and woodland, savanna, shrubland, artificial - terrestrial.
Manrubio, Marrubio

The Useful Plants of Boyacá project

Introduced in Colombia.
Alt. 1300 - 2625 m.

Compositae, H. Beentje, C. Jeffrey & D.J.N. Hind. Flora of Tropical East Africa. 2005

Morphology General Habit
Usually annual or short-lived perennial, erect to decumbent, simple or sparingly branched herb or sub-shrub to 1 m; stem terete, whitish pubescent and with some long, simple hairs.
Morphology Leaves
Leaves opposite to occasionally sub-opposite above, with pubescent petiole 0.4–3.2 cm, blade triangular to ovate, 1.3–5.8 cm long, 1–5.3 cm wide, base cordate to abruptly truncate, margins crenate to serrate, apex acute or obtuse, dark green, moderately hirsute above, a little paler, glabrous to sparsely hirsute beneath.
Morphology Reproductive morphology Inflorescences
Infloresence terminal, ± 7–60 heads borne in tight cymose clusters on pubescent and hirsute bracteolate common stalks; capitula 4–7 mm diameter, stalks of individual capitula 0–6 mm extending to 12 mm in fruit; phyllaries green, lanceolate, usually 2-ribbed, outer series 3.5–4.5 mm long, 0.8–0.9 mm wide, inner slightly narrower, margins entire, apex acuminate, often purple, hirsute and glandular-stipitate especially basally.
Morphology Reproductive morphology Flowers Florets
Florets 70–103, corolla-funnel shaped, 2.5–3 mm long, tube white, limb blue, mauve, or white, lobes acute, sparsely to moderately short-pubescent; anthers basally subcordate; style-arms blue, mauve or white, clavate, exserted for ± 2.5 mm, papillate.
Morphology Reproductive morphology Fruits
Achenes 1.2–2 mm long, sub-glabrous, with occasional setae between ribs; pappus 0–3 mm long, of 5 free triangular scales, lacerate, acuminate into a slender awn with scabrid margins, or pappus awnless, scales coroniform, truncate, lacerate, or occasionally pappus absent.
Fig. 181/9 (page 828).

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.

Adventicia en Colombia; Alt. 1300 - 2625 m.; Andes, Sierra Nevada de Santa Marta.
Morphology General Habit
Hierba, subarbusto, arbusto
No Evaluada

Bernal, R., G. Galeano, A. Rodríguez, H. Sarmiento y M. Gutiérrez. 2017. Nombres Comunes de las Plantas de Colombia.

manrubio, marrubio, yerba de chivo


Use Environmental
Environmental uses.
Use Materials
Used as material.
Use Medicines
Medical uses.

Use Medicines Unspecified Medicinal Disorders
Medicinal (State of the World's Plants 2016, Instituto Humboldt 2014).

Common Names

Marubio, marrubio.


  • Catálogo de Plantas y Líquenes de Colombia

  • Colombian resources for Plants made Accessible

    • ColPlantA 2021. Published on the Internet at
  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at and
    • © Copyright 2022 World Checklist of Vascular Plants.
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at and
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants.
  • Kew Science Photographs

    • Copyright applied to individual images
  • Universidad Nacional de Colombia

    • ColPlantA database
  • Useful Plants and Fungi of Colombia

  • Useful Plants of Boyacá Project

    • ColPlantA database