Chinese Mangrove-Avicennia Marina
Avicennia marina, commonly known as grey mangrove or white mangrove, is a
species of mangrove tree classified in the plant family Acanthaceae (formerly in the
verbenaceae or Avicenniaceae). As with other mangroves, it occurs in the intertidal
zones of estuarine areas. Grey mangroves grow as a shrub or tree to a height of
three to ten metres, or up to 14 metres in tropical regions.
The habit is a gnarled arrangement of multiple branches. It has smooth light-grey bark made up of thin, stiff, brittle
flakes. This may be whitish, a characteristic described in the common name. The leaves are thick, five to eight
centimetres long, a bright, glossy green on the upper surface, and silvery-white, or grey, with very small matted
hairs on the surface below. As with other Avicennia species, it has aerial roots. These grow to a height of about 20
centimetres, and a diameter of one centimetre. These allow the plant to absorb oxygen, which is deficient in its
habitat. These roots also anchor the plant during the frequent inundation of seawater in the soft substrate of tidal
systems. The flowers range from white to a golden yellow colour, are less than a centimetre across, and occur in
clusters of three to five. The fruit contains large cotyledons that surround the new stem of a seedling. This produces
a large fleshy seed, often germinating on the tree and falling as a seedling. The grey mangrove can experience
stunted growth in water conditions that are too saline, but thrive to their full height in waters where both salt and
fresh water are present. The species can tolerate high salinity by excreting salts through its leaves.
Grey mangrove is a highly variable tree, with a number of ecotypes, and forms closely resembling other species.
It has been reported to tolerate extreme weather conditions, high winds, and various pests and diseases. It is a
pioneer in muddy soil conditions with a PH value of 6.5 to 8, but is intolerant of shade.
Young plants can be 15/25 cm high, it is 1 years old; other height can be available
Quantity in Max. per year is 2,000,000 pieces. The bare roots can be shipped by sea
or by air , we usually use some kind of cultivation medium to protect the roots ,make
the roots have enough moisture.
