This is the 5722nd most frequent Japanese word.
ちらす
"Chirasu" means "to scatter" or "to spread."
In this sentence, 'ちらしました' (chira shimashita) is used to describe the action of scattering or dispersing the fallen leaves by the wind.
風が落ち葉をちらしました。
The wind scattered the fallen leaves.
Here, 'ちらして' (chirashite) is utilized figuratively to indicate the act of diverting or scattering one's attention or focus.
彼は注意をちらしてしまいました。
He ended up diverting his attention.
'ちらされています' (chira sareteimasu) is used in a passive form to describe the flowers being scattered beautifully along the path by some agent.