Laguncularia racemosa
White Mangrove ( Laguncularia racemosa )
The White Mangrove ( Laguncularia racemosa ) is the only species of the genus Laguncularia within the family of wing seed plants ( Combretaceae ). Laguncularia racemosa grows as a mangrove tree in coastal areas of the tropics and sub-tropics of West Africa, North and South America. The trivial name "White Mangrove " is also used for a species of the genus Avicennia.
- 3.1 Literature
- 3.2 Notes and references
Description
Appearance and leaf
Laguncularia racemosa grows as a tree or shrub. Younger plants have a smooth, elderly a cracked bark. The root system is occasionally from pneumatophores (vertical growing up breathing roots).
The oppositely arranged leaves are continually divided into petiole and leaf blade. The petiole has a pair of glands; the glands secrete a nectar- like substance from. Further, microscopic (salt? ) Glands are found on the leaf blade. The simple, elliptical, full leaves leaf blade has a rounded or ausgerandetes upper end; in vernation it is rolled inwardly. Stomata are located on both sides of the leaf blade.
Inflorescence, flower and fruit
The flowers are usually hermaphroditic, occasionally found in the inflorescences and purely male flowers. Sometimes Laguncularia racemosa is so andromonözisch, rarely dioecious getrenntgeschlechtig ( dioecious ). The aged men inflorescences are terminal or pendant. The relatively small, hermaphrodite or unisexual flowers are radial symmetry and fünfzählig double perianth. The flowers are each about two bracts that have grown underneath the cup- shaped flowers cup ( hypanthium ) something. Above the fused bracts located just a short piece of the flower cup. The male flowers are about 2 millimeters and female and hermaphrodite flowers are up to 6.5 mm high. There are five sepals present. The five petals are short. The ten stamens are most as long as the corolla. In female flowers staminodes are present. The ovary contains two ovules. The stylus is short.
The fruit has a length of 12 to 20 millimeters and a diameter of 4 to 10 millimeters. The one-seeded fruit germinates soon after it was dropped.
System
The first publication was in 1759 under the name ( basionym ) Conocarpus racemosus by Carl Linnaeus in Systema Naturae, Editio Decima 2, p 930 The recombination to Laguncularia racemosa (L.) CFGaertn. in 1807 by Carl Friedrich von Gaertner in Supplementum Carpologiae, p 209, Plate 217, fig. 3 released, while the genus Laguncularia CFGaertn. positioned. Other synonyms for Laguncularia racemosa (L.) CFGaertn. are: Laguncularia obovata Miq, Rhizaeris alba Raf, Schousboea commutata Spreng.. .
Laguncularia racemosa is the only species and the type species of the genus Laguncularia from the tribe Laguncularieae in the subfamily Combretoideae within the family Combretaceae. Some authors also write a second article
Swell
- Laguncularia at Tropicos.org. Missouri Botanical Garden, St. Louis. Accessed on 15 January 2014.