Platostoma rotundifolium (Briq.) A.J. Paton

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Photo: Bart Wursten
Kaperekeza road, Nyika National Park

Photo: Bart Wursten
Along Northern Loop road towards Nganda Hill, Nyika National Park

Photo: Bart Wursten
Chelinda Bridge, Nyika National Park

Photo: Bart Wursten
Near Dam 2, Nyika National Park

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Synonyms:	Geniosporum angolense Briq. Geniosporum paludosum Baker Geniosporum rotundifolium Briq.
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Description:	Perennial herb up to 1.2 m tall with quadrangular branching stems growing from a woody rootstock. Leaves ovate to oblong, 15-50 mm long, more or less densely pubescent on both surfaces and scattered sessile glands,upper leaves often tinged white, pink or purplish; petiole 2-10 mm long; margin serrate-crenate. Inflorescence usually dense with many-flowered verticils close together,sometimes more distant below.Calyx 1-1.5 mm long densely pubescent and with sessile glands. Corolla 3-5 mm long, white or purple. Stamens exserted for c. 2 mm.
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Derivation of specific name:	rotundifolium: round-leaved.
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Worldwide distribution:	Widespread in Tropical Africa, Eswatini and Limpopo,Gauteng South Africa.
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Spot characters:	Display spot characters for this species
Literature:	Baumann, G. (2005). Photographic Guide to Wildflowers of Malawi Wildlife and Environmental Society of Malawi Pages 148 - 149. as Geniosporum paludosum (Includes a picture). Burrows, J.E. & Willis, C.K. (eds) (2005). Plants of the Nyika Plateau Southern African Botanical Diversity Network Report No. 31 SABONET, Pretoria Page 187. (Includes a picture). Da Silva, M.C., Izidine, S. & Amude, A.B. (2004). A preliminary checklist of the vascular plants of Mozambique. Southern African Botanical Diversity Network Report No. 30 Sabonet, Pretoria Page 78. Paton, A.J. et al. (2013). Lamiaceae Flora Zambesiaca 8(8) Pages 189 - 191. (Includes a picture). Phiri, P.S.M. (2005). A Checklist of Zambian Vascular Plants Southern African Botanical Diversity Network Report No. 32 Page 70. Wursten, B., Timberlake, J. & Darbyshire, I. (2017). The Chimanimani Mountains: an updated checklist. Kirkia 19(1) Page 93.

Other sources of information about Platostoma rotundifolium:

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Flora of Malawi: Platostoma rotundifolium
Flora of Mozambique: Platostoma rotundifolium
Flora of Zambia: Platostoma rotundifolium

External websites:

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