TRIPLE TRAIL (Bidens tripartita L.)
Family: folded (Cotnpositae)
The trifoliate clinging is a 1-year plant with straight lines, branchy, high to 90 cm stems. Its leaves are 3-5-slanted with serrated edges, tapering into a short, winged tail, facing each other. The whole plant is usually short hairy.
Basket inflorescences straight up or hanging down, they are covered with a casing, the scales of which are arranged in two rows: internal - numerous, oval, brownish yellow, external • - lanceolate, green, in the amount of 5-8. Numerous are embedded at the slightly convex bottom of the inflorescence, brownish yellow flowers, between which peel-shaped leaves stick out, called the pituitary glands. Flowers with a crown fused with 5 petals are twofold: one, called lingual (anyway, there are few or even none of them), they have a dorsal crown, fused into one long tongue, the rest, called tubular, they have a crown much shorter and radiant. Lingula flowers are sterile. In tubular flowers it is located 5 stamens fused with anthers into a tube, inside which pollen spills out. The stamens mature earlier than the pistil, which prevents self-pollination. The pistil neck, growing through the tube, pushes out the pollen, and at its top 2 the previously complex birthmarks bend open and are ready to receive the pollen. Pollination is carried out by insects, which find nectar at the bottom of the crown tube.
The flowering time is June, July and August.
The flowers have a lower ovary, from which, after pollination, a flattened fruit develops, truncated at the top, with 2 long and often still with 1-2 short bones, with backward barbs. This device is used to attach fruit to the hair or feathers of animals.
The 3-leaf hitch occurs in damp or wet places, on the banks or sills of post-pits, drainage ditches and other water bodies, very often together with a hanging hitch. It is also known as a weed among root crops. In Poland, it is commonly found in the lowlands and lower mountain locations. It grows almost all over Europe, in North and West Asia and Australia (probably dragged here).