Duma

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Ordo: Caryophyllales

Familia: Polygonaceae
Subfamilia: Polygonoideae
Tribus: Polygoneae
Subtribus: Polygoninae
Genus: Duma
Species: D. coccoloboides – D. florulenta – D. horrida
Source(s) of checklist:

Govaerts, R. et al. 2020. Duma in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2020 Nov 29. Reference page.

Name

Duma T.M.Schust., Int. J. Pl. Sci. 172(8): 1061 (2011).

Type species: Duma florulenta (Meisn.) T.M.Schust. Int. J. Pl. Sci. 172(8): 1061 (2011).

Distribution
Native distribution areas:

Continental: Asia-Temperate
Regional: Middle Asia
Tadzhikistan, Uzbekistan.
Continental: Australasia
Regional: Australia
New South Wales, Northern Territory, Queensland, South Australia, Victoria, Western Australia.

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition
References
Primary references

Schuster, T.M., Wilson, K.L. & Kron, K.A. 2011. Phylogenetic relationships of Muehlenbeckia, Fallopia, and Reynoutria (Polygonaceae) investigated with chloroplast and nuclear sequence data. International Journal of Plant Sciences 172(8): 1053–1066. DOI: 10.1086/661293 PDF Reference page.

Links

International Plant Names Index. 2017. Duma. Published online. Accessed: Mar. 8 2017.

Duma is a genus of shrubby flowering plants in the family Polygonaceae, subfamily Polygonoideae. The genus was separated from Muehlenbeckia in 2011.[2] The native range of the genus is Australia.[1]
Contents

1 Description
2 Taxonomy
2.1 Species
3 References

Description

Species of Duma are shrubs, with many flexible branches, whose tips are thornlike. They have white to greyish bark. The leaves are longer than wide, with a very small curved spine at the tip. The flowers are without stalks (petioles). Plants are dioecious. Staminate flowers have eight stamens and a rudimentary or missing pistil; pistillate flowers have staminodes. The fruit is in the form of an ovoid or three-angled achene, which is smooth and shiny.[3]
Taxonomy

The genus Duma was created by Tanja Schuster in 2011 for some species previously placed in Muehlenbeckia, but which were shown by molecular phylogenetic studies to form a distinct clade. The name is derived from the Latin for "thorn-bush".[3] Duma is placed in the tribe Polygoneae of the subfamily Polygonoideae. Within the tribe, it is most closely related to the genera Atraphaxis and Polygonum, forming the so-called "DAP clade", and is not so closely related to Muehlenbeckia.[2]

Polygoneae

Knorringia         Polygonum ciliinode (syn. Fallopia ciliinodis)   DAP clade   Duma       Atraphaxis     Polygonum         RMF clade   Reynoutria       Muehlenbeckia     Fallopia s.s.

 
Species

As of March 2019, three species were accepted by Plants of the World Online:[1]

Duma coccoloboides (J.M.Black) T.M.Schust. (syn. Muehlenbeckia coccoloboides)
Duma florulenta (Meisn.) T.M.Schust. (syn. Muehlenbeckia florulenta)
Duma horrida (H.Gross) T.M.Schust. (syn. Muehlenbeckia horrida)

References

"Duma T.M.Schust.", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2019-03-04
Schuster, Tanja M.; Reveal, James L.; Bayly, Michael J. & Kron, Kathleen A. (2015), "An updated molecular phylogeny of Polygonoideae (Polygonaceae): Relationships of Oxygonum, Pteroxygonum, and Rumex, and a new circumscription of Koenigia", Taxon, 64 (6): 1188–1208, doi:10.12705/646.5
Schuster, T.M.; Wilson, K.L. & Kron, K.A. (2011), "Phylogenetic relationships of Muehlenbeckia, Fallopia and Reynoutria (Polygonaceae) investigated with chloroplast and nuclear sequence data", International Journal of Plant Sciences, 172: 1053–1066, doi:10.1086/661293, JSTOR 10.1086/661293