Wikipedia
Jagera is a genus of 4 species of forest trees known to science, constituting part of the plant family Sapindaceae.
They grow naturally in the rainforests and associated forests of eastern Australia, New Guinea and the Moluccas.
In Australia, Jagera pseudorhus is the most well known, and commonly named foambark, due to the saponins in the bark foaming after heavy rain. Indigenous Australians use this foam as the de-oxygenator of waterway pools for temporarily suffocating their fish enabling easy catching.
The genus is named after Herbert de Jager, a Dutch orientalist and associate of the botanist Georg Eberhard Rumphius.
In the last few decades various new names have been formally published, numbers of them subsequently corrected to synonyms of earlier names and a few remaining recognised as genuine new species or varieties.
One recognised species in Malesia apparently remains still to be formally described.
The Jagera is a tribe of Australian Aboriginal people which inhabited the region southwest of the city of Brisbane including Ipswich) before European settlement of Australia. It is alternately known as Yagara, Yuggera or Jagara. Much of its claimed land overlaps with that of the neighbouring Turrbal tribe. Former senator Neville Bonner was a tribal elder of the Jagera.
The three tribes were members of the Jagara Language Group that stretched from Moreton Bay to the Bremer River and Lockyer Creek. The Noonucal were in the Pulan (Amity Pt) area, the Gorenpul were in the Moongalba (Dunwich) area and the Koobenpul lived on the mainland coastal strip stretching from Talwarrapin (Redland Bay) to the mouth of the Maiwah (Brisbane River).
The Australian English word 'Yakka' (loosely meaning Work, as in 'Hard Yakka') came from this tribe.