Coprosma temetiuensis
| Coprosma temetiuensis | ||||||||||||
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Branch with leaves and female flowers |
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| Scientific name | ||||||||||||
| Coprosma temetiuensis | ||||||||||||
| WLWagner & Lorence |
Coprosma temetiuensis is a plant from the genus Coprosma in the family of the Rubiaceae (Rubiaceae). It occurs endemically only on one island of the Marquesas Islands in the southern Pacific.
description
Vegetative characteristics
Coprosma temetiuensis grows as a shrub that can reach heights of 4 to 6 meters. The bark of young twigs is hairy.
The constantly against arranged on the branches leaves are divided into a petiole and leaf blade. The petiole is 0.3 to 0.8 inches long. The simple, thin-leathery leaf blade is elliptical with a length of 5.1 to 9.1 centimeters and a width of 2.1 to 3.6 centimeters. The base of the spreading tapers in a wedge shape, the tip of the spreader is pointed to pointed and the edge of the spreading is entire. Both the top and bottom of the leaf are bare. Eight to nine secondary nerves branch off from each side of the leaf median nerve . Small, mostly somewhat elongated domatia can be found along the central leaf nerve . The interpetiolaren stipules resemble the true leaves, 0.15 to 0.3 centimeters long and are about grown to four fifths of its total length to each other. Both the upper and lower side of the stipules are bare and they have toothed and ciliate leaf margins. The blunt tip of the stipules has a conspicuous appendage.
Generative characteristics
The lateral zymöse inflorescences and contain three to seven individual flowers. The upper end of the inflorescences is formed by a three-flowered umbel . The lower branches of the inflorescence each have one or two flowers. The finely hairy flower stalks of the female flowers may be absent or up to 4 millimeters long.
The unisexual flowers are radial symmetry and five-fold with a double flower envelope . The five sepals are tubularly fused in the female flowers and the 0.25 to 0.3 millimeter long calyx is about 0.2 millimeters from the hairless calyx teeth. The five petals are fused together in a funnel shape and the corolla tube ends in five corolla lobes. In the female flowers, the corolla tube is around 0.3 millimeters and the corolla lobes between 2.2 and 2.5 millimeters long. The stylus becomes 5.5 to 7 millimeters long. Nothing is known about the male flowers.
The unripe stone fruits are sparsely hairy. Nothing is known about the ripe fruits or the seeds.
distribution
The natural range of Coprosma temetiuensis is on the Marquesas Islands in the southern Pacific . Coprosma temetiuensis is an endemic that is only found on the island of Hiva Oa . As far as known so far, this includes the summit region of Mont Temetiu .
Coprosma temetiuensis thrives at altitudes of 700 to 800 meters. This species grows there in semi-arid and damp forests. Various species of Alsophila , Crossostylis , Freycinetia , Hibiscus ( Hibiscus ), Ironwoods ( Metrosideros ), Screw trees ( Pandanus ), Phyllanthus and Weinmannia grow in the forests .
Taxonomy
The first description of Coprosma temetiuensis was made in 2011 by Warren L. Wagner and David H. Lorence in phytokeys . The specific epithet temetiuensis refers to the occurrence of the species on Mont Temetiu .
Individual evidence
- ↑ a b c d e f g h Warren L. Wagner, David H. Lorence: Revision of Coprosma (Rubiaceae, tribe Anthospermeae) in the Marquesas Islands . In: PhytoKeys . No. 4 , 2011, ISSN 1314-2003 , p. 109-124 , doi : 10.3897 / phytokeys.4.1600 .
- ↑ Coprosma temetiuensis at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed November 13, 2016.
