Draw the structure of boric acid showing hydrogen bonding. Which species is present in water? What is the hybridization of boron in this species?

(N/A) Boric acid $(H_{3}BO_{3})$ has a layered structure in which planar $H_{3}BO_{3}$ units are joined by hydrogen bonds,forming hexagonal rings as shown in the structure.
Boric acid is a weak monobasic acid. It is not a protonic acid but acts as a Lewis acid by accepting electrons from a hydroxyl ion.
In water,boric acid is present in the form of the $[B(OH)_{4}]^{-}$ species.
The hybridization of boron in this species is $sp^{3}$.
The reaction is: $B(OH)_{3} + 2H_{2}O \rightarrow [B(OH)_{4}]^{-} + H_{3}O^{+}$