Brachystephanus africanus
When this brightly-coloured, forest floor herb was found by a Kew-led team on Namuli Mountain, it was the first time Brachystephanus africanus had been recorded from Mozambique.
Species information
- Scientific name: Brachystephanus africanus S.Moore
- Conservation status: Least Concern (LC) according to IUCN Red List criteria.
- Habitat: Understorey in tropical forests.
- Key uses: None recorded.
- Known hazards: None recorded.
Taxonomy
- Class: Equisetopsida
- Subclass: Magnoliidae
- Superorder: Asteranae
- Order: Lamiales
- Family: Acanthaceae
- Genus: Brachystephanus
About this species
Brachystephanus africanus has long been known to occur in central and eastern Africa, and in Madagascar, but in 2008 Stephen Mphamba collected the first specimen of this species in Mozambique during Kew-led fieldwork on Namuli Mountain. Since then it has also been collected on the nearby Mabu Mountain (also in Mozambique). There are currently three recognised varieties: B. africanus var. africanus (only found in tropical forest on mountains and the variety that occurs in Mozambique), B. africanus var. recurvatus (found on mountains in the Democratic Republic of Congo), and B. africanus var. madagascariensis (found in Madagascar). The Madagascan sub-group is clearly geographically separated from the other sub-groups, while the ranges of the East African and Congolese subgroups overlap geographically. As the structural differences seen in the plants are not significantly greater between the subgroups that geographically overlap compared to those that are separated, the decision was made to classify the three different subgroups as varieties.
Geography & Distribution
Native to the Democratic Republic of Congo, Uganda, Tanzania, Malawi, Mozambique and Madagascar.
Description
Brachystephanus africanus is a herb that produces fresh stems from a woody base. It grows to 0.3–2 m tall and has leaves 5.5–24 cm long and 1.8–10 cm wide, with a petiole (leaf stalk) 0.7–6.2 cm long. The inflorescence takes the form of a spike of flowers and is 5.5–25 cm long. It bears bracts (small, leaf-like, flower-protecting structures) 5–25 mm long, 1.7–6.5 mm wide, which are dark green or tinged pink, purple or red-brown with somewhat transparent margins and a group of hairs usually restricted to the tip. The inflorescence also bears bracteoles (even smaller, leaf-like, flower-protecting structures) 2–6.5 mm long and 0.5–1 mm wide, also with transparent margins. The calyx lobes (outer protective structures of the flower) are 2.5-17 mm long. The flowers are mauve, violet, blue, rose or red, and are 29-51 mm long. The tube of the flower is narrowly cylindrical, 22–38 mm long and covered with short hairs. The upper lip of the flower is 6.5–13.5 mm long and 5.5–8 mm wide, with the tip ending in a small, projecting point. The lower lip of the flower is 7–14.5 mm long and 6–8.5 mm wide. The stamens (male parts) are 13.5–36 mm long and project out of the flower. The style (female part) is 35–75 mm long. The fruit is a hard capsule, 11.5–15 mm long.
In Brachystephanus africanus var. africanus the tip of the bract is either straight or bent inwards, distinguishing it from B. africanus var. recurvatus, which has bracts with outward-bending tips. (In B. africanus var. madagascariensis the bracts are unlike those of the other varieties as they are widest near their tip and the tip is slightly outwardly bent but not completely revurved).
Threats & Conservation
Brachystephanus africanus has been assessed as Least Concern as it is widespread and often locally abundant.
Millennium Seed Bank: Seed storage
The Millennium Seed Bank partnership aims to save plant life worldwide, focusing on plants under threat and those of most use in the future. Seeds are dried, packaged and stored at a sub-zero temperature in Kew's seed bank vault at Wakehurst.
Collections stored in the Millennium Seed Bank: One.
This species at Kew
Several dried and pressed specimens of Brachystephanus africanus are held in Kew’s Herbarium, including a type specimen. The details of some of these specimens can be seen online in the Herbarium Catalogue. Herbarium specimens are available to researchers by appointment.
Useful links
Search Kew’s science databases to find out more about this species
Find out more about the Kew expedition to Mozambique, on which this species was found
Find out more about African Floras: Flora of Tropical East Africa and Flora Zambesiaca
Explore Brachystephanus in The Plant List
References and credits
Darbyshire, I., Vollesen, K. & Kelbessa, E. (2010). Flora of Tropical East Africa: Acanthaceae. Royal Botanic Gardens, Kew.
Kew Science Editor: Tim Harris
Kew contributors: Iain Darbyshire
Copyediting: Emma Tredwell
While every effort has been taken to ensure that the information contained in these pages is reliable and complete, the notes on hazards, edibility and suchlike included here are recorded information and do not constitute recommendations. No responsibility will be taken for readers’ own actions. Full website terms and conditions.
Follow Kew
Keep up to date with events and news from Kew
Related Species
This species belongs to...
Fact Box
Osteospermum hyoseroides
star of the veldt
The name Osteospermum comes from the Greek osteon (bone) and the Latin spermum (seed).
Related Tags
- edible
- medicinal
- clever
- extraordinary
- healing
- valuable
- collectable
- newly discovered
- unusual
- scarce
- rare
- discovered
- old
- around the world
- adventurous
- ancient
- historical
- interesting
- agriculture
- ancient
- amazing
- beautiful
- inspiring
- landscapes
- rare
- ornamental
- new
- flowering
- of use
- wild
- passionate
- tasty
- big
- weed
- common
- mysterious
- fruity
- pretty
- endangered
- irreplaceable
- massive
- ground breaking
- creative
- fun
- imaginative
- popular
- exotic
- dangerous
- poisonous
- fragrant
- vibrant
- spiky
- essential
- english garden
- garden plants
Plants & Fungi blogs from Kew
Durian - the king of fruit
by: Wolfgang Stuppy, Millennium Seed Bank blog 03 Jun 2013
The southeast Asian plant Durian has been called the King of Fruits but, like Marmite, it sharply divides opinion between those who love the incredible taste of its custard-like pulp and those who are revolted by its putrid smell.
- 26 likes
- 4 comments
Mapping Coffee in Ethiopia part two
by: Paul Little, GIS team blog 08 May 2013
Kew photographer Paul Little has just returned from accompanying a field trip to the Highlands of Ethiopia to research the impact of climate change on the vital coffee crop. Read part two of his diary of the trip.
- 8 likes
- 1 comment
Seed collecting on Mount Kilimanjaro
by: Emma Williams, Millennium Seed Bank blog 18 Apr 2013
Kew Gardens botanist Emma Williams recounts her experiences on a recent seed collecting expedition to Mount Kilimanjaro in Tanzania.
- 22 likes
- 2 comments
Durian - the king of fruit
by: Wolfgang Stuppy, Millennium Seed Bank blog 03 Jun 2013
The southeast Asian plant Durian has been called the King of Fruits but, like Marmite, it sharply divides opinion between those who love the incredible taste of its custard-like pulp and those who are revolted by its putrid smell.
- 26 likes
- 4 comments
Observations on a strange vegetable - the snake gourd
by: Wolfgang Stuppy, Millennium Seed Bank blog 25 Jan 2013
He may be a Seed Morphologist but Wolfgang Stuppy of Kew's Millennium Seed Bank discovers there is more to the snake gourd than just some strange fruit and eccentric seeds.
- 43 likes
- 9 comments
Directors' Correspondence Digitisation Team
by: Helen Hartley, Library, Art and Archives blog 11 Dec 2009
Meet the Library Arts and Archives Digitisation Team and find out what they do.
- 41 likes
- 2 comments