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flat-top whiteweed

Scientific Name: Ageratum corymbosum

Family: Asteraceae

Category: Dicot

Growth: Subshrub, Forb/herb

Duration: Perennial

Other Names:

       

Ageratum corymbosum: Flat-top Whiteweed

Ageratum corymbosum, commonly known as Flat-top Whiteweed, is a perennial subshrub belonging to the genus Ageratum.

Considerations for Pets

  • As a subshrub, Ageratum corymbosum has the potential to grow to a height of 30-100 cm.
  • The plant's stems can be erect to basally decumbent.

Taxonomy and Nomenclature

  • Scientific Name: Ageratum corymbosum Zuccagni ex Pers.
  • Kingdom: Plantae
  • Taxonomic Rank: Species
  • Family: Asteraceae (implied, through mention of astrini&#371)
  • Synonyms:
    • Ageratum guatemalense M.F. Johnson
    • Ageratum corymbosum var. jaliscense B. L. Robinson
    • Ageratum salicifolium Hemsley
    • Ageratum strictum Hemsley
  • Common Names:
    • Flat-top Whiteweed
    • Flattop
    • Butterfly Mist
    • Whiteweed (in the USA)

Morphology and Growth

  • Ageratum corymbosum is a perennial or subshrub, typically growing to a height of 30-100 cm.
  • The plant has fibrous roots.
  • Stems can be erect to basally decumbent, covered in fine hairs (puberulent) or minutely strigoso-hispid.
  • Leaf blades are ovate.
  • The plant bears 4-18 flower heads arranged in showy, flat-topped clusters.

Distribution and Habitat

  • Observed in Inyo.
  • Suitable for planting in vases with varying watering needs.

Quirky Facts

  • There is a "snowcapped" variety of Ageratum with white tops and blue flowers.

Further Information

  • Discover Life offers a page about the biology, natural history, ecology, identification, and distribution of Ageratum corymbosum.
  • Information can also be found at Integrated Taxonomic Information.
  • NatureServe provides trusted information.
  • IRMNG recognizes this species.
  • Flora of North America Vol. 21 provides further information.