Spermatophyta: Dicotyledonae: Metachlamydeae: Asterales

Asteraceae - Sunflower family

Compositae

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: 85 genera and 179 taxa.

No image yet

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

GenusContent
Acanthospermum SchrankDescription
Achillea L.Description
Adenostemma J.R. Forst. & G. Forst.Description
Ageratum L.Description
Amellus L.
Arctotis L.Description
Artemisia L.Description
Artemisiopsis S. MooreDescription
Aspilia ThouarsDescription
Aster L.Description
Athrixia Ker Gawl.Description
Berkheya Ehrh.Description
Bidens L.Description
Blainvillea Cass.Description
Blumea DC.Description
Brachylaena R. Br.Description
Calostephane Benth.Description
Chrysocoma L.
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
Emilia (Cass.) Cass.Description
Eriocephalus L.
Erlangea Sch. Bip.Description
Ethulia L.f.Description
Euryops (Cass.) Cass.Description
Felicia Cass.Description
Flaveria Juss.Description
Galeomma Rauschert
Galinsoga Ruiz & Pav.Description
Gazania Gaertn.Description
Geigeria Griess.Description
Gnaphalium L.Description
Grangea Adans.Description
Haplocarpha Less.Description
Helichrysum Mill.Description
Hertia Less.
Hirpicium Cass.Description
Kleinia Mill.Description, Image
Lactuca L.Description
Laggera Benth.Description
Launaea Cass.Description
Leysera L.
Litogyne Harv.Description, Image
Macledium Cass.
Melanthera RohrDescription
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
Philyrophyllum O. Hoffm.Description
Platycarpha Less.
Pleiotaxis SteetzDescription, Image
Pluchea Cass.Description, Image
Pseudoconyza Cuatrec.Description
Pseudognaphalium Kirp.Description
Psiadia Jacq.Description
Pteronia L.
Pulicaria Gaertn.Description
Rennera Merxm.
Rosenia Thunb.
Schkuhria RothDescription
Sclerocarpus Jacq.Description
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 Malawi: Asteraceae
Flora of Mozambique: Asteraceae
Flora of Mozambique: cultivated Asteraceae
Flora of Zambia: Asteraceae
Flora of Zimbabwe: Asteraceae
Flora of Zimbabwe: cultivated Asteraceae

External websites:

GRIN (Germplasm Resources Information Network) taxonomy for plants report for Asteraceae
Google: Web - Images - Scholar


Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2014-17

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2017). Flora of Botswana: Family page: Asteraceae.
http://www.botswanaflora.com/speciesdata/family.php?family_id=26, retrieved 12 December 2017

Site software last modified: 26 December 2016 9:08pm
Terms of use