Coprosma reticulata
| Coprosma reticulata | ||||||||||||
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| Scientific name | ||||||||||||
| Coprosma reticulata | ||||||||||||
| J.Florence |
Coprosma reticulata 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 reticulata grows as a shrub or small tree that can reach heights of 3 to 10 meters. The bark of the branches, which are up to 12 centimeters thick, is bare.
The cross-opposite leaves on the branches are divided into a petiole and a leaf blade. The petiole has narrow wings and is 0.3 to 1.3 inches long. The simple, thin, leathery leaf blade is 8.5 to 19.7 centimeters long and 3 to 13 centimeters wide and is oblanceolate to oblong to elliptical. The base of the spade tapers to a point, the tip of the spreader is pointed and the edge of the spread is entire. Both the top and bottom of the leaf are bare, but conspicuous raphids can be seen on the underside . 8 to 13 dark secondary veins branch off from each side of the narrow central leaf vein . The tertiary leaf veins are branched like a network. Small, slightly elongated domatia can be found along the central leaf vein . The interpetiolaren stipules are similar to the foliage leaves, 0.3 to 0.5 centimeters long and are grown about one-half to four fifths of its total length to each other. The top of the stipules is glabrous while the underside is hairy. They have toothed and ciliate leaf margins. The tip of the stipules is blunt and has an appendage.
Generative characteristics
The lateral, single or occasionally triple branched, zymous inflorescences usually contain seven, rarely more individual flowers. The upper end of the inflorescences is formed by a three-flowered umbel . The lower branches of the inflorescence have one or two flowers. The fine flower stalks are sparsely hairy.
The unisexual flowers are radial symmetry and four to six-fold with a double flower envelope . The four to six sepals are fused together in the male flowers and the 0.8 to 2.4 millimeter long calyx is 0.5 to 1.5 millimeters on the calyx tube and 0.3 to 0.9 millimeters on the calyx teeth. In the female flowers, the calyx tubes are 0.4 to 0.8 millimeters and the calyx teeth 0.3 to 0.6 millimeters long. The four to six petals are fused together in a funnel shape and the corolla tube ends in four to six corolla lobes. In the male flowers, the corolla tube is 3.5 to 4.2 millimeters and the corolla lobes about 3.4 to 4 millimeters long, while the lengths of the female flowers are 1.5 to 2 millimeters and 2.2 to 2.5 Reach millimeters. The stamens inserted at the base of the corolla tube are 1 to 1.3 centimeters long. The anthers reach sizes of about 0.5 centimeters. The stylus is 0.8 to 1 centimeter long.
The juicy stone fruits are 0.7 to 0.8 centimeters in length and 0.35 to 0.4 centimeters in diameter, obovate to elliptical. When ripe they are colored orange. There are permanent calyx teeth at its tip. The wrinkled stone cores are flattened at a length of about 0.6 centimeters and a width of about 0.3 centimeters and oval-elliptical in shape. Each stone core houses a single seed.
distribution
The natural range of Coprosma reticulata is on the Marquesas Islands in the southern Pacific . Coprosma reticulata is endemic , only on the, on the island of Nuku Hiva located Toovii occurs -Plateau.
Coprosma reticulata thrives at altitudes of 800 to 1100 meters. This species grows in damp forests. Various species of Alsophila , Crossostylis , Dicranopteris , Fagraea , Freycinetia , Histiopteris , ironwoods ( Metrosideros ), sword ferns ( Nephrolepis ) and Weinmannia grow in the forests .
Taxonomy
The first description of Coprosma reticulata was made in 1986 by Jacques Florence in Bulletin du Muséum National d'Histoire Naturelle, Section B, Adansonia. sér. 4, Botanique Phytochimie 8 . The specific epithet reticulata refers to the network-like branched tertiary leaf veins.
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 reticulata at Tropicos.org. Missouri Botanical Garden, St. Louis, Retrieved November 12, 2016.