8795.000 Ageratum L. - Flossflowers

Description of the genus

Annual herbs (in ours). Lower leaves opposite, the upper alternate. Leaves petiolate, ovate, crenate-serrate. Capitula several-flowered in a dense corymb or occasionally a lax panicle, homogamous, discoid. Involucre campanulate. Phyllaries 2-3-seriate, subequal, with membranous margins. Receptacular scales 0. Flowers blue, purple (rarely pink) or white. Anthers with an oblong apical appendage. Pappus usually of 5 fimbriate or lacerate scales, extended into scabrid awns.

Derivation of name: Ageratum: Greek for not growing old, first applied to an everlasting.

Worldwide: 44 species in tropical America.

Zimbabwe: 2 taxa.

Ageratum houstonianum

Links to taxa:     View: living plant images - herbarium specimen images - all images for this genus

SpeciesFZ divisionsContent
conyzoides L.N,W,C,E,SDescription, Image
houstonianum MillC,EDescription, Image

Other sources of information about Ageratum:

Our websites:

Flora of Botswana: Ageratum
Flora of Caprivi: Ageratum
Flora of Malawi: Ageratum
Flora of Mozambique: Ageratum
Flora of Zambia: Ageratum
Flora of Zimbabwe: cultivated Ageratum

External websites:

ePIC (electronic Plant Information Center): Ageratum
Flora Zambesiaca web site: Ageratum
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network) taxonomy for plants report for Ageratum
IPNI (International Plant Names Index): Ageratum
Kew Herbarium catalogue: Ageratum

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-16

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2016). Flora of Zimbabwe: Genus page: Ageratum.
http://www.zimbabweflora.co.zw/speciesdata/genus.php?genus_id=1468, retrieved 28 October 2016

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