Spermatophyta: Dicotyledonae: Metachlamydeae: Asterales

Asteraceae - Sunflower family


Beentje, H.J. & Ghazanfar, S.A. (eds.) (2005) Compositae (Part 3) Flora of Tropical East Africa

Beentje, H.J. (ed.) (2000) Compositae (Part 1) Flora of Tropical East Africa

Beentje, H.J. (ed.) (2002) Compositae (Part 2) Flora of Tropical East Africa

Pope, G.V. (1992) Compositae Flora Zambesiaca 6(1)

Description of the family

Herbs, suffrutices, shrubs or (rarely) climbers or trees. Leaves alternate, less often opposite. Stipules 0, but false stipules occur in a few species (for example: Vernonia myriantha and Senecio deltoideus) . Flowers small (florets), aggregated into heads (capitula) and simulating single larger flowers and surrounded by a calyx-like involucre of one or more series of bracts (phyllaries). Receptacle of the head expanded, with or without receptacular scales or bristles each subtending a floret. Florets all similar sexually (head homogamous) or central and marginal florets differing (head heterogamous) and then the central florets usually bisexual or rarely male, the outer female or rarely neuter. Calyx never typically herbaceous but represented by a pappus of numerous simple or feathery (plumose) hairs, or a smaller number of membranous scales, teeth or bristles, or by a continuous membranous ring; sometimes 0.

Corolla composed of (3-)5 united petals fused into a tube below and with a distal limb consisting of either: (1) 5 actinomorphic lobes or teeth (tubular florets); or (2) a unilateral strap-shaped limb (ray) 0-3(-4)-dentate at the apex; or (3) a unilateral strap-shaped limb (ligule), 5-dentate at the apex.

Stamens 5, borne on the corolla-tube; anthers usually fused into a cylinder around the style. Ovary inferior, 1-celled, with 1 basal ovule; style single below but branching above into 2 stigmatic arms. Fruit an achene, crowned by the pappus, sometimes with a slender beak interposed between them.

Worldwide: 1,528 genera and 22,750 species, cosmopolitan, excluding Antarctica.

Botswana: 87 genera and 188 taxa.

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Links to genera:     View: living plant images - herbarium specimen images - all images for this family

Acanthospermum SchrankDescription
Achillea L.Description
Adenostemma J.R. Forst. & G. Forst.Description
Ageratum L.Description
Amellus L.Description
Arctotis L.Description
Artemisia L.Description
Artemisiopsis S. MooreDescription, Image
Aspilia ThouarsDescription
Aster L.Description
Athrixia Ker Gawl.Description
Berkheya Ehrh.Description, Image
Bidens L.Description
Blainvillea Cass.Description
Blumea DC.Description
Brachylaena R. Br.Description, Image
Calostephane Benth.Description
Chrysocoma L.Description
Conyza Less.Description
Cotula L.Description
Crassocephalum Moench.Description
Denekia Thunb.Description
Dicoma Cass.Description
Dimorphotheca MoenchDescription
Distephanus Cass.Description
Doellia Sch. Bip.Description
Eclipta L.Description, Image
Emilia (Cass.) Cass.Description, Image
Erigeron L.Description
Eriocephalus L.Description
Erlangea Sch. Bip.Description
Eschenbachia MoenchImage
Ethulia L.f.Description
Euryops (Cass.) Cass.Description
Felicia Cass.Description
Flaveria Juss.Description
Galeomma RauschertDescription
Galinsoga Ruiz & Pav.Description
Gazania Gaertn.Description
Geigeria Griess.Description
Gnaphalium L.Description
Grangea Adans.Description
Haplocarpha Less.Description
Helichrysum Mill.Description
Hertia Less.Description
Hirpicium Cass.Description
Kleinia Mill.Description, Image
Lactuca L.Description
Laggera Benth.Description
Launaea Cass.Description
Leysera L.Description
Lipotriche R. Br.Image
Litogyne Harv.Description, Image
Macledium Cass.
Mikania Willd.Description
Nicolasia S. MooreDescription
Nidorella Cass.Description
Nolletia Cass.Description
Osteospermum L.Description
Parthenium L.Description
Pechuel-Loeschea O. Hoffm.Description
Pegolettia Cass.Description
Pentzia Thunb.Description, Image
Philyrophyllum O. Hoffm.Description
Platycarpha Less.Description
Pleiotaxis SteetzDescription, Image
Pluchea Cass.Description, Image
Pseudoconyza Cuatrec.Description, Image
Pseudognaphalium Kirp.Description
Psiadia Jacq.Description
Pteronia L.Description
Pulicaria Gaertn.Description
Rennera Merxm.Description
Rosenia Thunb.Description
Schkuhria RothDescription
Sclerocarpus Jacq.Description, Image
Senecio L.Description
Sonchus L.Description
Sphaeranthus L.Description
Tagetes L.Description
Tarchonanthus L.Description
Tithonia Desf. ex Juss.Description
Tridax L.Description
Verbesina L.Description
Vernonia Schreb.Description
Xanthium L.Description
Zinnia L.Description

Other sources of information about Asteraceae:

Our websites:

Flora of Caprivi: Asteraceae
Flora of Caprivi: cultivated Asteraceae
Flora of Malawi: Asteraceae
Flora of Malawi: cultivated Asteraceae
Flora of Mozambique: Asteraceae
Flora of Mozambique: cultivated Asteraceae
Flora of Zambia: Asteraceae
Flora of Zambia: cultivated Asteraceae
Flora of Zimbabwe: Asteraceae
Flora of Zimbabwe: cultivated Asteraceae

External websites:

African Plants: A Photo Guide (Senckenberg): Asteraceae
BHL (Biodiversity Heritage Library): Asteraceae
EOL (Encyclopedia of Life): Asteraceae
GBIF (Global Biodiversity Information Facility): Asteraceae
Google: Web - Images - Scholar
iNaturalist: Asteraceae
IPNI (International Plant Names Index): Asteraceae
JSTOR Plant Science: Asteraceae
Mansfeld World Database of Agricultural and Horticultural Crops: Asteraceae
Wikipedia: Asteraceae
Plants of the World Online: Asteraceae
Tropicos: Asteraceae

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2014-24

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2024). Flora of Botswana: Family page: Asteraceae.
https://www.botswanaflora.com/speciesdata/family.php?family_id=26, retrieved 21 July 2024

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