Coprosma lucida J.R.Forst. & G.Forst..

국표에 없다.

Coprosma lucida, commonly known as shining karamu, karamū, kāramuramu, shiny karamu, or kakaramu, is a shrub or tree endemic to New Zealand.

Species Description

Coprosma lucida is a plant that is typically found in the form of a shrub or tree. This plant reaches a maximum height between 5 and 6 metres.

This species of Coprosma is a large-leaved species compared with other Coprosmas. The leaves are dark green on the upper surface and a paler green underneath, with a leaf margin that sometimes undulates. The leaves of C. lucida are typically between 12 and 17cm long. The typical width of C. lucida leaves at their widest point is 3-5cm. The leaves are elliptical in shape, with a decreasing width at the tip of the leaf and where the leaf meets the petiole. The petiole of a plant connects the leaf to the stem. For C. lucida, the petiole is typically 1-3cm long, with a short, triangular stipule between opposite petioles. This triangular green stipule is green, which differs from the black tip on the stipule of the otherwise similar-looking and often co-occurring Coprosma robusta. On the leaves of C. lucida, the midrib is very prominent and can be felt protruding from the upper and lower surfaces of the leaf  (unlike Coprosma robusta, which has an indented midrib on its upper surface).

The underside of C. lucida leaves typically has domatia. Domatia are large follicles on the leaf surface that provide shelter for mites to live on the leaf and protect the leaf from invading pests and diseases. The domatia on C. lucida can be found in the junctions between the secondary veins and the midrib.

The roots and inner bark of C. lucida are a yellow colour, rather than dull brown like the similar C. robusta. Additionally, unlike C. robusta and some other Coprosma species, C. lucida does not have a foul-smelling odour. The yellow colouration of C. lucida bark is caused by the presence of anthraquinones in the bark; anthraquinones are molecules that provide a yellow dying quality to the tissue. The branches of C. lucida are short and thick, with younger branches having a greener structure and older branches turning brown with the development of bark.

Typically, C. lucida is dioecious. This means that plants of this species are either male or female and produce either pollen or seeds. However, some cases of monoecy have been observed in C. lucida, where individual plants were noted to have both male and female reproductive structures. The flowers that are produced by C. lucida are present on panicles extending from the leaf axils of older branches. The leaf axils are the locations where the petioles of the leaves meet the branches of the plant. The flowers of C. lucida are white or green in colouration.

C. lucida produces small clusters of oblong fruit that are yellow-orange to orange. Each fruit has two seeds surrounded by an endocarp and a juicy pericarp. At the point where the peduncle meets the fruit, the peduncle widens slightly. A peduncle is a specialised stem that holds the fruit to the branch of the tree.

Coprosma lucida - Wikipedia

Coprosma lucida • New Zealand Plant Conservation Network (nzpcn.org.nz)

https://youtu.be/LhqptB5OSZY?t=499