Haumaniastrum caeruleum (Oliv.) P.A. Duvign. & Plancke

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Mavhuradonha Wilderness Area

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Synonyms:	Acrocephalus caeruleus Oliv. Acrocephalus lilacinus Oliv. Haumaniastrum gracile (Briq.) P.A. Duvign. & Plancke
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Description:	Perennial herb to 1 m tall. Stem sometimes with small buds bearing orbicular leaves at the base, glabrous to pubescent with antrorse or spreading hairs. Leaves sessile or shortly petiolate; lamina linear to narrowly elliptic. Upper leaves subtending heads 5-25 mm long, caudate or apiculate with an ovate, orbicular or obcordate broad basal portion, white or bluish with a green apex, often inrolled, sometimes reflexed. Heads 5-20 mm long, arranged in lax or dense corymbs. Corolla 4-6 mm long, white, pink, blue or purple.
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Derivation of specific name:	caeruleum: term used for various shades of blue, e.g. sky-blue or dark blue
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Worldwide distribution:	From Senegal to the Central African Republic, Congo, Burundi, Sudan, Ethiopia, Uganda, Kenya, Tanzania, Angola, Malawi, Zambia and Zimbabwe.
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Spot characters:	Display spot characters for this species
Literature:	Mapaura, A. & Timberlake, J. (eds) (2004). A checklist of Zimbabwean vascular plants Southern African Botanical Diversity Network Report No. 33 Sabonet, Pretoria and Harare Page 55. Paton, A.J. et al. (2013). Lamiaceae Flora Zambesiaca 8(8) Pages 175 - 179. (Includes a picture).

Other sources of information about Haumaniastrum caeruleum:

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Flora of Malawi: Haumaniastrum caeruleum
Flora of Zambia: Haumaniastrum caeruleum
Flora of Zimbabwe: Haumaniastrum caeruleum

External websites:

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