Swollen spongy petiole is present in
Hydrilla
Eichhornia
Ruppia
Pistia
Leaves arising from an underground stem like bulb are called radical leaves. The leaves arise on nodes of stem branches are called
Study of flowers is
Leaves fall off from branches in winter due to
The coloured part in Poinsettia $(Euphorbia)$ is
Interpetiolar stipules occur in