Trees in spring

Some tree species bloom simultaneously with the onset of swelling of the kidneys, much earlier deployment of the leaves. These species include gray alder, which bloom first, and hazel (filberts), begin to bloom is usually the day after alder (near Moscow, on average early in the second half of April). Catkins of hazel and alder are formed even earlier in the summer in early spring they rapidly elongate, and as soon established warm weather, scales them apart, and starts to fall out of the anther • pollen. pollen transfer occurs by wind. zatsvetshuyu Shake a branch of alder or hickory, and you'll see how it will separate from the yellow cloud pollen. In the cold, as well as in inclement weather, the anthers were not disclosed. after 5 days after flowering hazel begins to bloom red willow. appears to this time, bees, wasps and bees eagerly visit willow because of the nectar. Verba - the first of the early spring honey plants. Almost simultaneously with the willow blooms small shrub forest - wolf's bark. Branches of it, still do not have leaves at this time are covered with lilac-pink fragrant flowers, similar in shape to the flowers of lilac. leaves it disbanded at the time when he is already beginning to fade . In late April, begin to bloom aspen and willow-Bredin. At the same time deploying the first leaves of black currants, gooseberries and red elderberry, and then at the cherry. With what curiosity following observer for the joy of spring flowering Every day brings something new . The grass is growing rapidly. From stockyards kicked Pining for fresh fodder. Some of the other covered with soft green shrubs and trees. In early May bloom leaves the majority of our trees and shrubs: the lilac, birch, willow, rowan, alder, hazel , elm, jasmine, willow and many others. They begin to turn green poplar, Norway maple, aspen, and in the gardens bloom leaves of apple and pear trees. Later deploying leaf linden and oak. In the European part of our Union grow two kinds of oak: in the south - the so- called winter oak (Quercus sessi-liflora Sm.), in the middle forest belt - old oak (Quercus pedunculata Ehrh.), which once spread much farther north than now. Summer oak occurs here in two forms. Their can not be distinguished by appearance, but they differ on the deployment of the leaves. At the same variety, they bloom in the middle lane slightly earlier than the other. For this they are called "early" and "late" oak. Another difference between them is that early autumn oak drops all leaves, and later retains some dried leaves until next spring. Using these two features, it is interesting to find out which of the two species of oak is predominant in your area. great danger for the developing plants represent the sudden cold weather returns, accompanied by frosts. Spring "Matinees," as they call it, the more dangerous, than they later returned. The late frosts do great damage to agriculture, damaging the flowers of fruit crops planted tender plants sprouting of potatoes and other field crops. suffers from frosts and the leaves on some tree species , such as oaks and ash. In the lowlands frosts are stronger than on the more elevated ground, Meteorological stations, making sure that the return of cold weather and on the basis of his observations are warning state and collective farms to ensure that they have taken the necessary protective measures (prikryvanie plants dymlenie, heating gardens special heaters, etc.). Naturalists could be of great help meteorological stations in the transmission of warnings about frost placed around them to collective farms. "Matinee" stop sometimes very late. "There were years when, near Moscow last frost in the air was observed June 12, and frost on the grass - even the 22 June (1910). But this rarely happens. Usually they come to an end much sooner. On average, for Moscow, this deadline falls on May 17-19. At the beginning of the second half of May has an average term flowering cherry and black currant. This time we take to be the beginning of the last period of the spring.