Duosperma quadrangulare (Klotzsch) Brummitt

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Duosperma quadrangulare

Photo: Fraser Gear
Along road from Entrance gate to Chitengo Camp, Gorongosa National Park

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Synonyms: Disperma dentatum (Klotzsch) C.B.Clarke
Nomaphila quadrangularis Klotzsch
Common names:
Status: Native
Erect or rarely decumbent, shrubby perennial herb, up to c. 1.2m tall. Stem 4-angled, aromatic when crushed, more or less densely covered with sticky glands and non-glandular hairs. Leaves opposite, elliptic to somewhat obovate, 3 - 20 cm long, hairless or with scattered glossy hairs on the veins; base decurrent; margin almost entire to toothed. Leaves often immature when flowering. Flowers in 1-3-flowered clusters in the upper axils, together often forming racemes or panicles with leaf-like bracts near the base of the inflorescence. Calyx with glandular and non-glandular hairs. Corolla white to mauve-purple with darker markings on the lower lip and a yellow to orange palate with stiff hairs on it. Fruit an obovoid capsule, 7-11 mm long, hairless or with scattered glands near the apex.
Derivation of specific name: quadrangulare: 4-angled, referring to the stems.
Habitat: In mixed deciduous woodland, alluvial grassland, on river banks, near pans or marshes, on termite mounds and in areas of old cultivation.
Altitude range: (metres) Up to 1500 m
Flowering time:Almost throughout the year
Worldwide distribution: Angola, Botswana, DRC, Namibia, Tanzania, Malawi, Mozambique, Zambia, Zimbabwe
Zimbabwe distribution: N,W,E,S
Growth form(s):
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species
Images last updated: Monday 27 December 2010

Setshogo, M.P. (2005). Preliminary checklist of the plants of Botswana. Sabonet Report no. 37. Sabonet, Pretoria and Gaborone Page 18.

Vollesen, K. (2013). Acanthaceae (Part 1) Flora Zambesiaca 8(5) Pages 160 - 161.


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Other sources of information about Duosperma quadrangulare:

Our websites:

Flora of Botswana: Duosperma quadrangulare
Flora of Caprivi: Duosperma quadrangulare
Flora of Malawi: Duosperma quadrangulare
Flora of Mozambique: Duosperma quadrangulare
Flora of Zambia: Duosperma quadrangulare

External websites:

African Plant Database: Duosperma quadrangulare
Biodiversity Explorer (Biodiversity of southern Africa): Duosperma quadrangulare
EOL (Encyclopedia of Life): Duosperma quadrangulare
ePIC (electronic Plant Information Center): Duosperma quadrangulare
Flora Zambesiaca web site: Duosperma quadrangulare
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network) taxonomy for plants report for Duosperma quadrangulare
IPNI (International Plant Names Index): Duosperma quadrangulare
Ispot Southern Africa : Duosperma quadrangulare
JSTOR Plant Science: Duosperma quadrangulare
Kew Herbarium catalogue: Duosperma quadrangulare
Tropicos: Duosperma quadrangulare
West African Plants database: Duosperma quadrangulare

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave, 2002-16

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2016). Flora of Zimbabwe: Species information: Duosperma quadrangulare.
http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=153330, retrieved 23 October 2016

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