It is the pollen-producing reproductive organ of a flower. The stamen (plural stamina or stamens) is the pollen-producing reproductive organ of a flower.
Oak Tree Pollen. Male and female flowers on an oak tree are situated on different parts of a branch. It is the male flower that contains the oak pollen. Male flowers, or catkins, look like long worms hanging from the oak tree during spring. After the stamens release pollen into the air, the catkins fall to the ground. Stamen with pollinia and its anther cap. Phalaenopsis orchid. In the typical flower (that is, in the majority of flowering plant species) each flower has both carpels and stamens. In some species, however, the flowers are unisexual with only carpels or stamens. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle portion. The sterile tissue between the lobes is called the connective. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. Plant Reproductive Structures. Plant sexual reproduction relies on stamens, which are the male parts, and pistils, which are the female parts. Stamens contribute the male genetic material in the form of pollen, which is produced from anthers that are on the terminal ends of stalks called filaments. The stamen (plural stamina or stamens) is the pollen-producing reproductive organ of a flower. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle portion. The sterile tissue between the lobes is called the connective. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte. stamen. n, pl stamens or stamina (ˈstaemɪnə). ˈstæmɪnə. (1) botany the male reproductive organ of a, flower consisting of a (stalk) filament bearing an anther in which pollen is. [Produced: c17 From: latin the warp in an upright, loom from stāre to]. stand stamen-the male reproductive organ of a flower. blossom, flower, bloom-reproductive organ of angiosperm plants especially one having showy or colorful parts. anther-the part of the stamen that contains pollen; usually borne on a stalk. OAK FLOWERS. Oak trees have male flowers on one part of their branch, and female flowers on another part of the same branch. When a plant bears both male and female flowers it's said to monoecious.At the right you see a flowering branch of a Black Oak, Quercus velutina, from a tree in southern Mississippi. Catkins are clusters, or inflorescences, of male flowers. Each of the bumps on the catkins is a male flower consisting of a bract (a highly modified leaf), a lobed calyx and some pollen-producing stamens. Once the stamens have released their pollen into the air, the entire catkin will fall from the tree. Pollen in plants is used for transferring haploid male genetic material from the anther of a single flower to the stigma of another in cross-pollination. In a case of self-pollination, this process takes place from the anther of a flower to the stigma of the same flower. Pollen grains have a hard coat made of sporopollenin that protects the gametophytes during the process of their movement from the stamens to the pistil of flowering plants or from the male cone to the female cone of coniferous plants. Many tree flowers, such as those of the maple tree, have stamens and pistils, but no sepals or. Claudia E. Mills/Biological Photo Service. Inside the ring of petals are the stamens. Each stamen has a stem, which is called the filament. At the top of the filament is the anther. The pollen grains form in sacs, usually two in number, inside the anther. Finally, inside the ring of stamens is the pistil. It is shaped like a vase, with a neck and oval base. The neck is known as the style. A stamen typically consists of a stalk called the filament and an anther which contains microsporangia. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle portion. The sterile tissue between the lobes is called the connective. A pollen grain develops from a microspore in the microsporangium and contains the male gametophyte.
http://www.ehow.com/about_6642296_oak-tree-pollen-acorns.html https://en.wikipedia.org/wiki/Stamen http://homeguides.sfgate.com/flowers-petals-sepals-stamens-pistils-60556.html https://en.wikipedia.org/wiki/Stamen http://www.thefreedictionary.com/stamen http://www.backyardnature.net/fl_bloak.htm https://en.wikipedia.org/wiki/Pollen http://kids.britannica.com/comptons/article-200873/flower https://en.wikipedia.org/wiki/Stamen
what is stamen from trees