2204.000 Oxygonum Burch.

Ronse Decraene, L.-P. & Akeroyd, J.R. (1988) Generic limits in Polygonum and related genera (Polygonaceae) on the basis of floral characters Botanical Journal of the Linnean Society 98 321-371

Description of the genus

Annual or perennial herbs, rarely shrubs. Ochreae present. Flowers polygamous and heterostylous, borne in axillary elongated racemes. Male flowers with a very short tube and 4-5 petaloid perianth segments. Bisexual flowers tubular; perianth segments persistent, the tube accrescent in fruit. Pedicels of bisexual flowers lengthening and thickening, those of the male flowers withering. Stamens 8, in 2 series, 5 outer and 3 inner. Styles 3. Fruiting perianth unarmed or with 3 prickles, sometimes winged.

Worldwide: 30 species in tropical and South Africa and Madagascar

Zambia: 13 taxa.

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

SpeciesFZ divisionsProvincesContent
alatum Burch. var. longisquamatum Germish.B,SS,W
annuum S. Ortiz & PaivaB,WW
buchananii (Dammer) J.B. GillettEE
carnosum R.A. Graham[DD]NLp
delagoense KuntzeSSDescription, Image
dregeanum Meisn.[Agg]N,W,C,E,SImage
dregeanum Meisn. subsp. strictum (C.H. Wright) Paiva & S. OrtizB,N,C,SN,C,Lk,W
fruticosum Dammer ex Milne-Redh.B,WNw,N
litorale R.A. Graham[DD]NLp
pachybasis Milne-Redh. N,WNw,N
salicifolium DammerSS
sinuatum (Hochst. & Steud. ex Meisn.) DammerB,N,W,C,E,SCb,N,E,C,Lk,S,WDescription, Image
tenerum Milne-Redh. WNw

Other sources of information about Oxygonum:

Our websites:

Flora of Botswana: Oxygonum
Flora of Caprivi: Oxygonum
Flora of Malawi: Oxygonum
Flora of Mozambique: Oxygonum
Flora of Zimbabwe: Oxygonum

External websites:

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

Copyright: Mike Bingham, Annette Willemen, Bart Wursten, Petra Ballings and Mark Hyde, 2011-17

Bingham, M.G., Willemen, A., Wursten, B.T., Ballings, P. and Hyde, M.A. (2017). Flora of Zambia: Genus page: Oxygonum.
http://www.zambiaflora.com/speciesdata/genus.php?genus_id=518, retrieved 19 November 2017

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