Libocedrus bidwillii

Libocedrus bidwillii, also called pāhautea, kaikawaka or New Zealand cedar,[2] is a species of Libocedrus, endemic to New Zealand. It is in the cypress family Cupressaceae.

Libocedrus bidwillii
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Pinophyta
Class: Pinopsida
Order: Pinales
Family: Cupressaceae
Genus: Libocedrus
Species:
L. bidwillii
Binomial name
Libocedrus bidwillii

Name

Libocedrus bidwillii is named after J. C. Bidwill, the New Zealand botanist and explorer.[3]

The species is commonly named by its Maori name pāhautea or kaikawaka. However, according to DOC botanist Geoff Rogers, pāhautea is preferred correct form.[4]

Description

It is an evergreen coniferous tree growing to 25 m tall, with a trunk up to 2.5 m diameter. The foliage is arranged in flattened sprays; the leaves are scale-like, 1.5–2 mm long and 1 mm broad, arranged in opposite decussate pairs on the shoots. The seed cones are cylindrical, 8–12 mm long, with four scales each with a prominent curved spine-like bract; they are arranged in two opposite decussate pairs around a small central columella; the outer pair of scales is small and sterile, the inner pair large, bearing two winged seeds. They are mature about six to eight months after pollination. The pollen cones are 2.5–5 mm long.[5]

The timber seldom becomes commercially available. It is very light in weight and a distinct light purple when cut. The timber in small dimension sizes is prone to spiral and twist when cut. It is sometimes used for lightweight sailing boat construction. It glues and holds ring nails well.

Distribution and habitat

The tree grows in both the North and South Islands; in the North Island, it occurs from Te Aroha southward. It grows at 250–1,200 m altitude in temperate rainforests.[5][6] It is absent from Stewart Island.[4]

Conservation status

Libocedrus bidwillii is listed as near-threatened species.

Apart from logging, the main threat of Libocedrus bidwillii comes from possums. Severe possum browse can kill a cedar tree, leaving only stark stag head.[4]

References
  1. Farjon, A. (2013). "Libocedrus bidwillii". IUCN Red List of Threatened Species. 2013: e.T42259A2967780. doi:10.2305/IUCN.UK.2013-1.RLTS.T42259A2967780.en.
  2. Wildlife Feature Archived 2009-05-28 at the Wayback Machine on Orokonui Ecosanctuary website, retrieved 2009-06-10
  3. Eagle, Audrey (2008). Eagle's complete trees and shrubs of New Zealand volume one. Wellington: Te Papa Press. p. 40. ISBN 9780909010089.
  4. Barnett, Shaun (2011). "Mountain cedar: Three places to see this shapely tree of the mountains". Wilnderneess: New Zealand's Magazine of the Outdoors (5): 18.
  5. Farjon, A. (2005). Monograph of Cupressaceae and Sciadopitys. Royal Botanic Gardens, Kew. ISBN 1-84246-068-4
  6. Conifer Specialist Group 2000: Libocedrus bidwillii
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