Annual herbs or subshrubs with annual stems, erect or prostrate, often tomentose
Leaves alternate, occasionally subrosulate, sessile, usually discolorous, entire or serrulate or revolute
Capitula discoid, all florets bisexual; or disciform, outer florets neuter
Involucre subglobose or subcampanulate; bracts in many rows, pungent, glabrous
Receptacle flat, epaleate
Florets with corolla white or purple; tube of bisexual floret dilated above, deeply 5-lobed; neuter florets narrowly tubular, sub-bilabiate or subradiate
Anthers linear; bases sagittate produced into long, retrorse-ciliate tails; apical appendage lanceolate
Style terete, slightly swollen at base, bifid at apex, tips obtuse with minute sweeping hairs
Cypselas obovoid to obconical, ribbed, pilose
Pappus of various bristles and/or scales in several rows; bristles scabrid to barbellate to plumose, apically pilose
x = 11
Nomenclature:
Dicoma Cass.
Cassini: 12 (1817)
Oliver & Hiern: 442 (1877)
Phillips: 850 (1951)
Wild: 178 (1972)
Hilliard: 582 (1977)
Lawalrée & Mvukiyumwami: 151 (1982)
Pope: 29 (1992)
Bremer: 99 (1994)
Distribution & Notes:
Global: Species 35, tropical and southern Africa, Madagascar, Sokotra, India
CASSINI, A.H.G. DE. 1817. Aperçu des genres ou sous-genres nouveaux formés par M. Henri Cassini dans la famille des Synanthérées. Bulletin des sciences de la Société Philomatique de Paris 4,1
HILLIARD, O.M. 1977. Compositae in Natal. University of Natal Press, Pietermaritzburg
LAWALRÉE, A. & MVUKIYUMWAMI, J. 1982. Le genre Dicoma Cassini (Asteraceae) en Afrique centrale. Bulletin du Jardin Botanique National de Belgique 52
OLIVER, D & HIERN, W.P. 1877. Compositae. Flora of tropical Africa 3
PHILLIPS, E.P. 1951. The genera of South African flowering plants, edn 2. Memoirs of the Botanical Survey of South Africa No. 25
WILD, H. 1972. The Compositae of the Flora zambesiaca area, 3. Mutisieae. Kirkia 8
Copyright of the content hosted by this website remains with the South African National Biodiversity Institute (SANBI), unless stated otherwise. Material from this site may be used in other media, provided that SANBI is acknowledged by the name South African National Biodiversity Institute (SANBI) or refer to the 'How to cite this resource' paragraph on the Home page. Liability disclaimer: Visitors use this site at their own risk and SANBI is not liable for any of the consequences resulting therefrom.
Welcome to Biodiversity Advisor 2.0!
Biodiversity Advisor, developed by the South African National Biodiversity Institute (SANBI) and its Data Partners, is a system that will provide integrated biodiversity information to a wide range of users who will have access to geospatial data, plant and animal species distribution data, ecosystem-level data, literature, images and metadata.
The integrated information comes from our much-loved Botanical Database of Southern Africa (BODATSA) also known as Plants of Southern Africa (POSA), Zoological Database of Southern Africa (ZODATSA), Biodiversity Geographic Information System (BGIS), SANBI's institutional repository (Opus) and others.
The system is still under development, so you may find a few bugs/issues. If you do, please report it via the error reporting button available in various sections of the website or provide us with any useful feedback you may have via the ‘Give us feedback’ option available in the sidebar menu. You can create a free account for yourself by clicking on the user profile icon which will take you through to the login page. Here you can choose the ‘Create an account’ option or simply fill in your details if you have an account already. Having an account on Biodiversity Advisor will provide users with free access to biodiversity resources.
In future, Team SANBI will be able to log in using their day-to-day login details, BGIS users will be able to use their existing accounts and details, and general users will be able to log in using their LinkedIn profile, but for now you will need to create an account.
