Приметы весны: цветёт мать-и-мачеха
Why do some flowers bloom before all?
Very early flowering has its advantages - before ripe seeds can germinate earlier, ahead of competitors. Therefore, some plants (as a mother and stepmother, for example) in full bloom when there is snow or just melted. But at close to zero temperature plant life almost stops, and for a very early flowering have to cook with all of last season. In particular, for this reason all the primroses - perennials. Please note that many primroses flowers appear before the leaves, in the mother and stepmother, for example, true leaves appear only when the flowers have faded (those leaves-scales that cover the stems of her flowers, it is not "real", they do not even very green and hardly capable of a lot nafotosintezirovat). When flowers appear, it is too cold for efficient photosynthesis, so leaves most primroses grow later when warmer. But you need to spend energy to expand flower to ripe all its stamens and pistils.
But the flowers themselves have laid nearly finished form, it remains only to turn around. This is noticeable in late summer - early autumn. If you dig the roots mother and stepmother, they are ready to "shoot" flower shoots. In bulbous primroses (such a lot - crocus, snowdrops Scilla) if autumn cut the onion, it can be seen folded floral escape. Well, and energy for the unfolding of these shoots also stocked in the last year - in the form of nutrients in the bulb or rhizome.