An $(n,k)$-flower $F(n,k)$ is the shadow of the closure of an $n$-braid $({\sigma }_1{\sigma }_2\cdots {\sigma }_{n-1}{)}^k$.
C. Lamm and V. O. Manturov independently showed the following: Let $K$ be a knot and $n\ge \mathrm{braid}(K)$. Then $K$ has $F(n,k)$ as its shadow for some $k$. We show the following: Let $K$ be a knot and $k\ge \mathrm{bridge}(K)$. Then $K$ has $F(n,k)$ as its shadow for some $n$. As a corollary, we show $\mathrm{bridge}(K)=\mathrm{lr}(K)$ where $\mathrm{lr}(K)$ is the left-right number of $K$. This gives us a new definition of the bridge number of a knot.