$Casuarina$ $equisetifolia$ is a

Which of the following provides the most durable wood?

Cricket bats are made from the wood of:

Statement $X$: $Hibiscus$ $rosa-sinensis$ was placed in $Thalamiflorae$ by $Bentham$ and $Hooker$.
Statement $Y$: It possesses a cup-shaped thalamus and its petals are fused.

China rose is called shoeflower because

Definitions / Explanation :
$(i)$ Phylloclade
$(ii)$ Aestivation