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Pisonia brunoniana is a species of flowering tree in the Bougainvillea family, Nyctaginaceae, that is native to New Zealandmarker, Norfolk Islandmarker, Lord Howe Islandmarker and Hawai imarker. The common names in New Zealand are Parapara or Birdcatcher tree.


Habit

Pisonia brunoniana is a small, spreading tree to or more tall. The wood is soft and the branches are brittle. The large leaves are opposite or ternate, glabrous, and glossy, entire, and obtuse to rounded at apex. The inflorescence is paniculate, many-flowered, and the flowers are unisexual. The very sticky fruits, in which small birds are often trapped, are narrowly ellipsoidal, and long, having five ribs.

Distribution in New Zealand

The seeds of P. brunoniana turn black and sticky as they ripen
In New Zealand, Pisonia brunoniana grows in coastal forest on Raoul Islandmarker in the Kermadec groupmarker, on the Three Kings Islands, and in the North Islandmarker in scattered locations from Whangape Harbourmarker to Mangawhaimarker. Historically, it grew near Aucklandmarker, on the Coromandel Peninsulamarker and at East Cape. It is now mainly found on offshore islands, especially rodent-free islands, where it often forms an important understorey component of mixed-broadleaf forest.

The plant is almost extinct in the North Island, partly because the large leaves of P. brunoniana are eagerly eaten by browsing animals such as possums, goats and feral cattle. However the main threat to accessible populations is the cutting down of trees by people trying to prevent small songbirds from becoming trapped by the sticky seeds.

The plant is reasonably common in cultivation as a decorative tree in New Zealand, especially in the northern North Island. Two variegated cultivars are sold as P. brunoniana in New Zealand nurseries, although one of these, which has leaves extensively marbled with white, may in fact be P. umbellifera, a similar species which occurs throughout the tropical Indo-Pacific.

In Hawai i

In Hawai imarker, where it is known as pāpala kēpau, P. brunoniana is most common in dry to mesic habitats. Although abundant in certain locations, such as Kīpuka Puaulu, it has a relatively restricted distribution compared to the related species P. sandwicensis and P. umbellifera. The sticky fruits were employed by the Hawaiian kia manu (bird catchers) to trap birds in order to collect feathers for capes and other objects.

Notes



References

  • Metcalf, Laurie, 2002. A Photographic Guide to Trees of New Zealand. Auckland: New Holland.
  • Salmon, J.T., 1986. The Native Trees of New Zealand. Wellington: Heinneman Reed.
  • Flora of Australia Online Pisonia brunoniana. Accessed 3 May 2007.
  • Hawaiian Ethnobotany Online Database, Bishop Museum. URL: Papala kepau. Accessed 3 May 2007.
  • New Zealand Plant Conservation Network, URL: Pisonia brunoniana. Accessed 3 May 2007.
  • Plants of Hawaii, URL: Papala kepau. Accessed 3 May 2007.



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