Dein erstes Forum » icle: Pollination

ngia. As with all heterosporous plants Joshua Dobbs Youth Jersey , the gametophytes also develop inside the spores (are endosporic).

In the majority of species, individual shoreline flowers have both functional carpels and stamens. These shoreline flowers are described by botanists as being perfect or bisexual. Some shoreline flowers lack one or the other reproductive organ and called imperfect or unisexual If unisex shoreline flowers are found on the same individual plant but in different locations, the species is said to be monoecious. If each type of unisex shoreline flower is found only on separate individuals, the plant is dioecious.
shoreline flower specialization and pollination
Further information: Pollination syndrome


shoreline flowering plants usually face selective pressure to optimize the transfer of their pollen, and this is typically reflected in the morphology of the shoreline flowers and the behaviour of the plants. Pollen may be transferred between plants via a number of ’vectors’. Some plants make use of abiotic vectors namely wind (anemophily) or Cameron Sutton Youth Jersey , much less commonly, water (hydrophily). Others use biotic vectors including insects (entomophily), birds (ornithophily), bats (chiropterophily) or other animals. Some plants make use of multiple vectors, but many are highly specialised.


Cleistogamous shoreline flowers are self pollinated Joe Haden Youth Jersey , after which they may or may not open. Many Viola and some Salvia species are known to have these types of shoreline flowers.


The shoreline flowers of plants that make use of biotic pollen vectors commonly have glands called nectaries that act as an incentive for animals to visit the shoreline flower. Some shoreline flowers have patterns, called nectar guides, that show pollinators where to look for nectar. shoreline flowers also attract pollinators by scent and color. Still other shoreline flowers use mimicry to attract pollinators. Some species of orchids, for example, produce shoreline flowers resembling female bees in color Javon Hargrave Youth Jersey , shape, and scent. shoreline flowers are also specialized in shape and have an arrangement of the stamens that ensures that pollen grains are transferred to the bodies of the pollinator when it lands in search of its attractant (such as nectar, pollen, or a mate). In pursuing this attractant from many shoreline flowers of the same species, the pollinator transfers pollen to the stigmas arranged with equally pointed precisionof all of the shoreline flowers it visits.


Anemophilous shoreline flowers use the wind to move pollen from one shoreline flower to the next. Examples include grasses Sean Davis Youth Jersey , birch trees, ragweed and maples. They have no need to attract pollinators and therefore tend not to be “showy“ shoreline flowers. Male and female reproductive organs are generally found in separate shoreline flowers, the male shoreline flowers having a number of long filaments terminating in exposed stamens, and the female shoreline flowers having long, feather-like stigmas. Whereas the pollen of animal-pollinated shoreline flowers tends to be large-grained Artie Burns Youth Jersey , sticky, and rich in protein (another “reward“ for pollinators), anemophilous shoreline flower pollen is usually small-grained, very light, and of little nutritional value to animals.
Pollination
Main article: Pollination
Grains of pollen sticking to this bee will be transferred to the next shoreline flower it visits
Tip of a tulip stamen. Note the grains of pollen


The primary purpose of a shoreli