Saturday, March 19, 2011

Orchid Flowers Orchidaceae

Posted: 19 Mar 2011 01:09 AM PDT

1orchid flowerx Haeckel Orchidae 01 Orchid Flowers Orchidaceae

Orchid or Orchidaceae tribe is a tribe of flowering plants with members of most species. Your options are widespread from tropical wet regions to circumpolar region, although most members are found in tropical regions. Most members of this tribe live as epiphytes, especially those from tropical regions. Orchids in temperate climates usually live in soil and form a tuber as a way of adapting to winter. Organs that tend to thick and “fleshy” (succulent) makes it stand the pressure of water availability. Epiphytic orchids can live from moisture and humid air.

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Members of the importance of human well-known is the ornamental orchid and vanilla has a beautiful flower petals and colorful

Botanical characteristics

Members of this family tends to have a succulent organs or “fleshy”: thick with high water content. Thus he can live in conditions of low water availability. Water is obtained from the rain, droplets, dew, or moisture in the air. However, orchids are not found in desert areas because roots are not intensive. Orchids like light but not direct sun, so he usually found in nature as a plant floor or in the shade of the forest. For ornamental plants, orchids stand in the room.

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Root fibers, not inside. The types of epiphytes that develop roots and succulent stems attached to the tree where he grew up, but does not harm the host tree. There is also growing geofitis, with another term means terrestria grown in soil with roots in the soil. There is also a saprophyte, growing on the media leaves and rotten wood that has decayed into humus. At the root surface is often found in fungal roots (mycorrhizae) are symbiotic with orchids.

Edged orchid stems. Orchids that live on the ground (“ground orchid”), short trunk and tend to resemble bulbs. Meanwhile, the trunk epiphytic orchids grow well, often thickened and covered a layer of wax to prevent excessive evaporation. Stem growth can be “elongated” (monopodial) or “widened” (simpodial), depending on the genus.

Orchid leaves are usually oval elongated with elongated leaves bones as well, typical monocot leaf. Leaves can also be thickened and serve as water storage.

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Orchid-shaped flowers and a distinctive character of that set it apart from other tribal members. Orchid flowers arranged compound, emerged from the elongated flower stalk, the leaves emerge from the armpit. The flowers of bilateral symmetry. Strands of flower petals (sepals) are usually colored with a crown-like flowers (so-called tepals). One strand of modified flower crown to form a kind of “tongue” that protects a structure that carries accessories stamen and pistil. Stamens have very short stem with two small disc-shaped anthers (called “pollinia”) and protected by a small structure that must be opened by insect pollinators (or humans for vanilla) and carry pollen to the pistil mouth. Without the help of organisms pollinators, pollination will not occur.

Orchid-shaped fruit capsule that is green and if cooked dry and open from the side. Seeds are small and lightweight, so easy to wind. Orchid seeds have no food reserve storage networks and even the embryo has not reached perfect ripeness. New germination occurred when seeds fall on the corresponding medium and continue its development until maturity.

4orchid flowerx Haeckel Orchidae 04 Orchid Flowers Orchidaceae

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