What is $Bhojpatra$ made from?

Buds typically occur at

Provide definitions/explanations for the following terms:
$(i)$ Spine
$(ii)$ Bulb

$A$ non-green stem branch that grows obliquely or sometimes grows horizontally inside the soil and then comes out of the soil as a leafy shoot is called:

In $Ruscus$,the stem is modified into ........

In gourds,axillary buds develop into spirally coiled structures called: