Showing posts with label Vegetation. Show all posts
Showing posts with label Vegetation. Show all posts

Tuesday, May 11, 2010

Eleocharis Dulcis

The Water chestnut (Eleocharis dulcis) commonly known as Pola Poli, is a grass-like sedge grown for its edible corms. It has tube-shaped, leafless green stems that grow to about 1.5 metres.
The small, rounded corms have a crispy white flesh and can be eaten raw, slightly boiled, grilled, pickled, or tinned.

Hydrilla Verticillata

Hydrilla (Esthwaite Waterweed or Hydrilla) is an aquatic plant genus, usually treated as containing just one species, Hydrilla verticillata, though some botanists divide it into several species. Synonyms include H. asiatica, H. japonica, H. lithuanica, and H. ovalifolica. It is native to the cool and warm waters of the Old World in Asia, Europe, Africa and Australia, with a sparse, scattered distribution; in Europe, it is reported from Ireland, Great Britain, Germany, and the Baltic States, and in Australia from Northern Territory, Queensland, and New South Wales.

Water Lily

Nymphaeaceae is a name for a family of flowering plants. Members of this family are commonly called water lilies and live in freshwater areas in temperate and tropical climates around the world. The family contains 8 genera. There are about 70 species of water lilies around the world[1]. The genus Nymphaea contains about 35 species across the Northern Hemisphere[1]. The genus Victoria contains two species of giant water lilies and can be found in South America[1]. Water lilies are rooted in soil in bodies of water, with leaves and flowers floating on the water surface. The leaves are round, with a radial notch in Nymphaea and Nuphar, but fully circular in Victoria.
Water lilies are divided into two main categories: hardy and tropical. Hardy water lilies bloom only during the day, but tropical water lilies can bloom either day or night, and are the only group to contain blue-flowered plants.
Water lilies can be fragrant, such as Nymphaea odorata.

Sacred Lotus (Indian Lotus)

Nelumbo nucifera is known by a number of common names, including Indian lotus, sacred lotus, bean of India, and sacred water-lily. Botanically, Nelumbo nucifera (Gaertn.) may also be referred to by its former names, Nelumbium speciosum (Wild.) or Nymphaea nelumbo. This plant is an aquatic perennial. Under favorable circumstances its seeds may remain viable for many years.
In ancient Egypt, the lotus flower was depicted on wall engravings and pillars since the time of the Old Kingdom (2686 - 2181 BC). The ancient Egyptians venerated the blue water-lily, Nymphaea caerulea, which was sometimes known as the "blue lotus" or "sacred lotus".
N. nucifera was native to a huge area from modern Vietnam to Afghanistan, being spread widely as an ornamental and food plant. In 1787 it was first brought into horticulture in Western Europe as a stove-house water-lily under the patronage of Joseph Banks and can be seen in botanical garden collections where heating is provided. Today it is rare or extinct in the wild in Africa but widely naturalized in southern Asia and Australia, where it is commonly cultivated in water gardens. It is the national flower of India and Vietnam.

Prosopis Juliflora

Prosopis juliflora (Spanish: bayahonda blanca) is a shrub or small tree native to Mexico, South America and the Caribbean. It has become established as a weed in Asia, Australia and elsewhere. Its uses include forage, wood and environmental management.[1] The tree grows to a height of up to 12 metres (39 ft) and has a trunk with a diameter of up to 1.2 metres (3.9 ft).[2] It's known to hold the record for depth of penetration by roots. Prosopis juliflora roots were found growing at a depth of 53.3 meters (nearly 175 feet) at an open-pit mine near Tucson, Arizona.

Acacia Nilotica

Acacia nilotica is a tree 5-20 m high with a dense spheric crown, stems and branches usually dark to black coloured, fissured bark, grey-pinkish slash, exuding a reddish low quality gum. The tree has thin, straight, light, grey spines in axillary pairs, usually in 3 to 12 pairs, 5 to 7.5 cm long in young trees, mature trees commonly without thorns. The leaves are bipinnate, with 3-6 pairs of pinnulae and 10-30 pairs of leaflets each, tomentose, rachis with a gland at the bottom of the last pair of pinnulae. Flowers in globulous heads 1.2-1.5 cm in diameter of a bright golden-yellow color, set up either axillary or whorly on peduncles 2-3 cm long located at the end of the branches. Pods are strongly constricted, hairy, white-grey, thick and softly tomentose. Its seeds number approximately 8000/kg.

Pongamia Pinnata

It is a deciduous tree that grows to about 15-25 meters in height with a large canopy that spreads equally wide. The leaves are a soft, shiny burgundy in early summer and mature to a glossy, deep green as the season progresses. Small clusters of white, purple, and pink flowers blossom on their branches throughout the year, maturing into brown seed pods. The tree is well suited to intense heat and sunlight and its dense network of lateral roots and its thick, long taproot make it drought tolerant. The dense shade it provides slows the evaporation of surface water and its root structures promote nitrogen fixation, which moves nutrients from the air into the soil. Withstanding temperatures slightly below 0°C to 50°C and annual rainfall of 5-25 dm, the tree grows wild on sandy and rocky soils, including oolitic limestone, but will grow in most soil types, even with its roots in salt water.

Salix Alba

Salix alba (White Willow) is a species of willow native to Europe and western and central Asia. The name derives from the white tone to the undersides of the leaves.

It is a medium-sized to large deciduous tree growing up to 10-30 m tall, with a trunk up to 1 m diameter and an irregular, often leaning crown. The bark is grey-brown, deeply fissured in older trees. The shoots in the typical species are grey-brown to green-brown. The leaves are paler than most other willows, due to a covering of very fine silky white hairs, particularly on the underside; they are 5-10 cm long and 0.5-1.5 cm wide. The flowers are produced in catkins in early spring, and pollinated by insects. It is dioecious, with male and female catkins on separate trees; the male catkins are 4–5 cm long, the female catkins 3–4 cm long at pollination, lengthening as the fruit matures. When mature in mid summer, the female catkins comprise numerous small (4 mm) capsules each containing numerous minute seeds embedded in white down which aids wind dispersal.

Eucalyptus

Eucalyptus is a diverse genus of trees (and a few shrubs), the members of which dominate the tree flora of Australia. There are more than seven hundred species of Eucalyptus, mostly native to Australia, with a very small number found in adjacent parts of New Guinea and Indonesia and one as far north as the Philippines islands. Species of Eucalyptus are cultivated throughout the tropics and subtropics including the Americas, England, Africa, the Mediterranean Basin, the Middle East, China and the Indian Subcontinent.

Eucalyptus is one of three similar genera that are commonly referred to as "eucalypts," the others being Corymbia and Angophora. Many, but far from all, are known as gum trees in reference to the habit of many species to exude copious sap from any break in the bark (e.g. Scribbly Gum).

Eucalyptus has attracted attention from global development researchers and environmentalists. Outside of their natural ranges eucalypts are both lauded for its beneficial economic impact on poor populations and derided for being an invasive water-sucker, leading to controversy over its total impact and future. It is a fast-growing source of wood, its oil can be used for cleaning and functions as a natural insecticide, and it is sometimes used to drain swamps and thereby reduce malaria risk.

Acacia Auriculiformis

Acacia auriculiformis, commonly known as Auri, Earleaf acacia, Earpod wattle, Northern black wattle, Papuan wattle, Tan wattle, is a fast-growing, crooked, gnarly and thorny tree in the family Fabaceae. It is native to Australia, Indonesia, and Papua New Guinea. It grows up to 30m tall. Acacia auriculiformis has about 47 000 seeds/kg.
This plant is raised as an ornamental plant, as a shade tree and it is also raised on plantations for fuelwood throughout southeast Asia Oceana and in Sudan. Its wood is good for making paper, furniture and tools. It contains tannin usesful in animal hide tanning. In India, its wood and charcoal are widely used for fuel. Gum from the tree is sold commercially, but it is said not to be as useful as gum arabic.[1] The tree is used to make an analgesic by indigenous Australians. Extracts of Acacia auriculiformis heartwood inhibit fungi that attack wood.