Libocedrus
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Libocedrus austrocaledonica |
Libocedrus is a genus of five species of coniferous trees in the cypress family Cupressaceae, native to New Zealand and New Caledonia. The genus is closely related to the South American genera Pilgerodendron and Austrocedrus, and the New Guinean genus Papuacedrus, both of which are included within Libocedrus by some botanists; the four genera together form an example of the Antarctic flora distribution. These genera are rather similar to the Northern Hemisphere genera Calocedrus and Thuja: in earlier days, what is now Calocedrus was sometimes included in Libocedrus. They are much less closely related, as recently confirmed (Gadek et al. 2000).
The leaves are scale-like, 3-7 mm long, in apparent whorls of four (actually opposite decussate pairs, but not evenly spaced apart, instead with the successive pairs closely then distantly spaced). The cones are 8-20 mm long, and have just 2 pairs of moderately thin, erect scales, each scale with a distinct spine 3-7 mm long on the outer face, and bearing two winged seeds on the inner face.
The two New Zealand species are often known by their Māori names Kawaka (Libocedrus plumosa) and Pahautea (Libocedrus bidwillii), while no common names have been recorded for the three New Caledonian species.
[edit] Uses
The wood of Libocedrus is soft, moderately decay-resistant, and with a spicy-resinous fragrance. The two New Zealand species are also grown as ornamental plants.
[edit] References and external links
- Gadek, P. A., Alpers, D. L., Heslewood, M. M., & Quinn, C. J. 2000. Relationships within Cupressaceae sensu lato: a combined morphological and molecular approach. American Journal of Botany 87: 1044–1057. Abstract.
- Arboretum de Villardebelle - cone photos
- Gymnosperm Database - Libocedrus
