Bidens frondosa · ilgakotis lakišius

EN · evil's beggarticks, devil's-pitchfork, devil's bootjack, sticktights, bur marigold, pitchfork weed, tickseed sunflower, leafy beggarticks, common beggar-ticks
DE · Schwarzfrüchtige Zweizahn
LV · lapainais sunītis
PL · uczep amerykański

https://en.wikipedia.org/wiki/Bidens_frondosa
Native to North America, invasive in Lithuania.
Bidens frondosa grows best where there is ample soil moisture and sun, especially in areas where something has disrupted the existing plant community leaving bare ground. It can survive in water saturated soils, frequently found growing at the water's edge, in drainage ditches or on flood plains.
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