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''Sophora prostrata'' is commonly known as kōwhai, prostrate kōwhai or dwarf kōwhai and is 
It is a low growing shrub reaching a height of around 2 metres. This species has a divaricating habit that lasts for the life of the shrub unlike other New Zealand ''Sophora'' species which lose the divaricating habit as adult trees..
The leaves of this species are usually quite small up to about 2 cm in length.
Flowers are often orange though they do occur as yellow in common with most other kōwhai species. The seeds are black or very dark brown and may appear dark red. This contrasts with other native New Zealand Sophora species whose seeds are yellow.
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...
to the eastern South Island
The South Island, also officially named , is the larger of the two major islands of New Zealand in surface area, the other being the smaller but more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasma ...
from Marlborough to the Waitaki Valley
The Waitaki River is a large braided river that drains the Mackenzie Basin and runs some south-east to enter the Pacific Ocean between Timaru and Oamaru on the east coast of the South Island of New Zealand. It starts at the confluence of th ...
in New Zealand
New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 List of islands of New Zealand, smaller islands. It is the ...
although most commonly found on the Banks Peninsula
Banks Peninsula is a peninsula of volcanic origin on the east coast of the South Island of New Zealand. It has an area of approximately and encompasses two large harbours and many smaller bays and coves. The South Island's largest city, ...
.
It is a low growing shrub reaching a height of around 2 metres. This species has a divaricating habit that lasts for the life of the shrub unlike other New Zealand ''Sophora'' species which lose the divaricating habit as adult trees..
The leaves of this species are usually quite small up to about 2 cm in length.
Flowers are often orange though they do occur as yellow in common with most other kōwhai species. The seeds are black or very dark brown and may appear dark red. This contrasts with other native New Zealand Sophora species whose seeds are yellow.
References
prostrata Trees of New Zealand Divaricating plants {{Sophoreae-stub