Margaretta rosea Oliv.
subsp. orbicularis (N.E. Br) Goyder

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Synonyms: Margaretta orbicularis K. Schum.
Margaretta pulchella Schltr.
Common names:
Frequency:
Status: Native
Description:
Erect perennial herb, growing from a carrot-shaped tuberous rootstock. Stems usually single, milky sap present. Leaves opposite, linear-oblong to lanceolate, up to 20 cm long, sparsely hairy on both surfaces; base slightly cordate. Flowers in terminal or extra-axillary 3-10-flowered subspherical umbels. Corolla 5-lobed nearly to the base, mostly violet, purple, magenta or white, sparsely hairy outside, hairless inside. Corona lobes arising from the base of the staminal column, basal part clawed with 2 teeth; upper orbicular, abruptly narrowing into the petal-like claw. Fruit in 2 erect follicles, narrowly spindle-shaped, smooth, pubescent.
Type location:
Malawi
Notes: See subsp. cornetii for comparison.
Derivation of specific name:
Habitat: Seasonally inundated, often burnt grassland.
Altitude range: 400 - 1600 m
Flowering time:Mostly Oct - Dec
Worldwide distribution: Southwestern Tanzania, Malawi, Zambia and Shaba DRC.
Zambian distribution (Flora Zambesiaca): W,C
Zambian distribution (Provinces):
Growth form(s):
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters: Display spot characters for this species
Literature:

Binns, B. (1968). A First Check List of the Herbaceous Flora of Malawi The Government Printer, Zomba, Malawi Page 21. as Margaretta orbicularis

Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 73. as Margaretta rosea subsp. bidens (Includes a picture).

Goyder, D.J. (2005). Infraspecific variation in Margaretta rosea Oliv. (Apocynaceae: Asclepiadoideae) Kew Bulletin 60(1) Pages 89 - 92.

Goyder, D.J., Gilbert, M.G. & Venter, H.J.T. (2020). Apocynaceae (Part 2) Flora Zambesiaca 7(2) Pages 281 - 283. (Includes a picture).

Other sources of information about Margaretta rosea subsp. orbicularis:

Our websites:

Flora of Malawi: Margaretta rosea subsp. orbicularis

External websites:

African Plants: A Photo Guide (Senckenberg): Margaretta rosea
BHL (Biodiversity Heritage Library): Margaretta rosea
EOL (Encyclopedia of Life): Margaretta rosea
ePIC (electronic Plant Information Center): Margaretta rosea
Flora Zambesiaca web site: Margaretta rosea
GBIF (Global Biodiversity Information Facility): Margaretta rosea
Google: Web - Images - Scholar
GRIN (Germplasm Resources Information Network): Margaretta rosea
iNaturalist: Margaretta rosea
IPNI (International Plant Names Index): Margaretta rosea
JSTOR Plant Science: Margaretta rosea
Kew Herbarium catalogue: Margaretta rosea
Mansfeld World Database of Agricultural and Horticultural Crops: Margaretta rosea
Plants of the World Online: Margaretta rosea
Tropicos: Margaretta rosea
Wikipedia: Margaretta rosea


Copyright: Mike Bingham, Annette Willemen, Bart Wursten, Petra Ballings and Mark Hyde, 2011-22

Bingham, M.G., Willemen, A., Wursten, B.T., Ballings, P. and Hyde, M.A. (2022). Flora of Zambia: Species information: Margaretta rosea subsp. orbicularis.
https://www.zambiaflora.com/speciesdata/species.php?species_id=225990, retrieved 5 October 2022

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