Vernonia rosenii R.E. Fr.

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Habit
Lightly wooded seepage dambo grassland
Saise Valley, Kalambo Farm, Mbala Distr.
Feb 2022
Photo: Nick Wightman

Lightly wooded seepage dambo grassland
Saise Valley, Kalambo Farm, Mbala Distr.
Feb 2022
Photo: Nick Wightman

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Species details: Click on each item to see an explanation of that item (Note: opens a new window)

Synonyms:	Linzia rosenii (R.E.Fr) H.Rob., Skvarla & V.A.Funk Vernonia glabra sensu Wild p.p.
Common names:
Frequency:	Local
Status:	Native
Description:	Perennial herb up to c. 43 cm tall growing from a woody rootstock; stems annual, 1 to several, branched, leafy, white woolly or pubescent at first becoming glabrescent; lower leaves with petioles c. 6 mm long while other leaves subsessile; leaf blades 1.5-8 x 0.5 -2.5 cm, narrowly oblong-elliptic to oblong-lanceolate, apex acute to rounded, base cuneate, margins strongly serrate to subentire; capitula many, large and laxly arranged, terminal and solitary or 2-4 corymbiformly cymose on long stalks 3-10 cm long; involucres 12-15 x 12-18 mm, broadly turbinate-campanulate; phyllaries many seriate, progressively longer towards the inside, greenish to straw-coloured with dark green or purplish tips; corollas cornflower blue or mauve, up to 18 mm long, narrowly tubular and gradually widening to a deeply lobed limb; achenes purplish-brown at maturity, 6-8 mm long, narrowly subcylindrical to subfusiform, c. 10-ribbed; outer pappus of irregular narrow scale-like setae 1-3 mm long; inner pappus of brown, purplish tinged, flattened subplumose setae 8-11 mm long.
Type location:	DRC
Notes:
Derivation of specific name:	rosenii: after Eric von Rosen, part of the Swedish Rhodesia-Congo Expedition, 1911-1912 when the type specimen was collected
Habitat:	A pyrophyte of floodplain and dambo grasslands and occasionally deciduous woodlands
Altitude range: (metres)
Flowering time:	Mar - Aug
Worldwide distribution:	DRC and Zambia south to Botswana and Zimbabwe
National distribution:	B,C,S
Zambian distribution (Provinces):	Lk,S,W
Growth form(s):	Perennial.
Endemic status:
Red data list status:
Insects associated with this species:
Spot characters:	Display spot characters for this species
Images last updated:	Friday 3 June 2022
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 29. Pope, G.V. (1992). Compositae Flora Zambesiaca 6(1) Page 91. Setshogo, M.P. (2005). Preliminary checklist of the plants of Botswana. Sabonet Report no. 37. Sabonet, Pretoria and Gaborone Page 39.

Other sources of information about Vernonia rosenii:

Our websites:

Flora of Botswana: Vernonia rosenii
Flora of Caprivi: Vernonia rosenii
Flora of Zimbabwe: Vernonia rosenii

External websites:

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