Duosperma dichotomum Vollesen

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Common names:
Status: Native
Erect shrubby perennial herb, up to c. 2 m tall, growing from a woody rootstock. Young stems with mixed glandular and non-glandular hairs. Leaves opposite, elliptic to obovate, up to 7.5 cm long, mostly hairless or with scattered longer hairs on the veins below; base decurrent to the stem with subauriculate lobes; margin scalloped. Flowers appearing in open, branched dichotomous heads, all branches ending in a flower; bracts leaf-like near the base of the inflorescence,glandular hairy. Calyx 7-9 mm long with narrowly triangular teeth, glandular hairy. *** ?? Corolla white with a mauve or uniformly mauve and orange spots at the base of the ; palate with long stiff hairs. Fruit an obovoid hairless capsule, 6-8 mm long.
Notes: Note: Only known from two older collections from northern Mozambique. Probably under collected and may also occur in southern Tanzania. Data deficient but should probably be listed as Vulnerable.
Derivation of specific name: dichotomum: dichotomous; regularly forking into two, referring to the inflorescence.
Habitat: Occurring in grassland on black cotton soil.
Altitude range:
Flowering time:
Worldwide distribution: Northern Mozambique and possibly in southern Tanzania.
Mozambique distribution: N
Growth form(s):
Endemic status: Near Endemic
Red data list status: Vulnerable
Insects associated with this species:
Spot characters: Display spot characters for this species

Darbyshire, I., Timberlake, J., Osborne, J., Rokni, S., Matimele, H., Langa. C., Datizua, C., de Sousa, C., Alves, T., Massingue, A., Hadj-Hammou, J., Dhanda, S., Shah, T., Wursten, B. (2019). The endemic plants of Mozambique: diversity and conservation status Phytotaxa 136 Page 79.

Vollesen, K. (2013). Acanthaceae (Part 1) Flora Zambesiaca 8(5) Pages 161 - 162.

Other sources of information about Duosperma dichotomum:

External websites:

African Plants: A Photo Guide (Senckenberg): Duosperma dichotomum
BHL (Biodiversity Heritage Library): Duosperma dichotomum
EOL (Encyclopedia of Life): Duosperma dichotomum
GBIF (Global Biodiversity Information Facility): Duosperma dichotomum
Google: Web - Images - Scholar
iNaturalist: Duosperma dichotomum
IPNI (International Plant Names Index): Duosperma dichotomum
JSTOR Plant Science: Duosperma dichotomum
Mansfeld World Database of Agricultural and Horticultural Crops: Duosperma dichotomum
Plants of the World Online: Duosperma dichotomum
Tropicos: Duosperma dichotomum
Wikipedia: Duosperma dichotomum

Copyright: Mark Hyde, Bart Wursten, Petra Ballings and Meg Coates Palgrave 2007-24

Hyde, M.A., Wursten, B.T., Ballings, P. & Coates Palgrave, M. (2024). Flora of Mozambique: Species information: Duosperma dichotomum.
https://www.mozambiqueflora.com/speciesdata/species.php?species_id=184430, retrieved 14 April 2024

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