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Ageratum houstonianum
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Photo: Bart Wursten
Vumba Rd, nr Mountain Lodge
Photo: Bart Wursten
By road from Swynnerton Memorial to main road, Chirinda Forest
Photo: Mark Hyde
By Mukuvisi River, Mukuvisi Woodlands, Harare
Photo: Mark Hyde
By Mukuvisi River, Mukuvisi Woodlands, Harare
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Species details: Click on each item to see an explanation of that item (Note: opens a new window)
| Synonyms: |
Ageratum conyzoides L. subsp. houstonianum (Mill.) Sahu Ageratum mexicanum Sims |
| Common names: | Floss flower (English) |
| Frequency: | Locally abundant |
| Status: | Introduced and naturalised |
| Description: |
Annual herb, 10-60 cm. Leaves: base usually cordate. Florets purple, occasionally pale lilac to white. Phyllaries 4-5 mm, linear-lanceolate, attenuate, entire, ciliate, the back densely glandular-hairy. Style arms exserted 2 mm or more from corolla tube. |
| Notes: | |
| Derivation of specific name: | |
| Habitat: | Roadsides, areas of disturbed ground and by streams. |
| Altitude range: | |
| Flowering time: | Oct - May |
| Worldwide distribution: | Native of Mexico but also a pantropical weed. |
| Malawi distribution: | N |
| Growth form(s): | |
| Endemic status: | |
| Red data list status: | |
| Insects associated with this species: | Hypolimnas misippus (Food plant) |
| Spot characters: | Display spot characters for this species |
| Literature: |
Beentje, H.J. & Ghazanfar, S.A. (eds.) (2005). Compositae (Part 3) Flora of Tropical East Africa Pages 828 - 832. (Includes a picture). Fabian, A. & Germishuizen, G. (1997). Wild Flowers of Northern South Africa. Fernwood Press, Vlaeburg. Page 436. (Includes a picture). Henderson, L. (2001). Alien weeds and invasive plants Plant Protection Research Institute Handbook No. 12. Plant Protection Research Institute, Agricultural Research Council, South Africa. Page 39. (Includes a picture). Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 23. Pooley, E. (1998). A Field Guide to the Wild Flowers of KwaZulu-Natal and the Eastern Region. Natal Flora Publications Trust. Durban. Page 498. (Includes a picture). |
Other sources of information about Ageratum houstonianum:
Our websites:
Flora of Caprivi: cultivated Ageratum houstonianumFlora of Mozambique: Ageratum houstonianum
Flora of Zambia: Ageratum houstonianum
Flora of Zimbabwe: Ageratum houstonianum
Flora of Zimbabwe: cultivated Ageratum houstonianum
External websites:
African Plants: A Photo Guide (Senckenberg): Ageratum houstonianumAfrican Plant Database: Ageratum houstonianum
BHL (Biodiversity Heritage Library): Ageratum houstonianum
EOL (Encyclopedia of Life): Ageratum houstonianum
GBIF (Global Biodiversity Information Facility): Ageratum houstonianum
Google: Web - Images - Scholar
iNaturalist: Ageratum houstonianum
IPNI (International Plant Names Index): Ageratum houstonianum
JSTOR Plant Science: Ageratum houstonianum
Mansfeld World Database of Agricultural and Horticultural Crops: Ageratum houstonianum
Plants of the World Online: Ageratum houstonianum
Tropicos: Ageratum houstonianum
Wikipedia: Ageratum houstonianum
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