Q.Draw and label the structure of epiphytic plant Vanda.

Vanda is anchored on tree bark by aerial roots with a velamen for moisture absorption, a green photosynthetic cortex, and a protective root cap -- it is an epiphyte, not a parasite.

Working

Since a diagram cannot be physically drawn here, the structure of Vanda, a classic epiphytic orchid, is described part by part as it would be labelled in the diagram, focusing on its distinctive aerial/epiphytic roots:

1. Aerial (epiphytic) roots: thick, cylindrical, cord-like roots that arise from the stem and either hang freely in the humid air or cling closely to the bark of the host tree on which the plant grows; they provide mechanical attachment/support and are the site of moisture and mineral absorption from the atmosphere.
2. Velamen: the outermost covering of the aerial root, a spongy, multi-layered tissue made of dead, empty cells with thickened walls; it appears whitish/silvery when dry and turns translucent green when wet (as the underlying green cortex becomes visible), and functions to rapidly absorb moisture and dissolved minerals from humid air, mist, or rainwater running down the tree bark.
3. Exodermis: a layer just beneath the velamen, containing thin-walled 'passage cells' that allow absorbed water to pass inward while other cells remain impermeable.
4. Cortex: a broad tissue region beneath the exodermis that, unusually for a root, contains chlorophyll, giving the root a green colour and allowing it to photosynthesise -- an adaptation that supplements the plant's nutrition since epiphytic roots are often exposed to light.
5. Endodermis and pericycle: inner layers surrounding the central vascular tissue, regulating the movement of absorbed water and nutrients toward the vascular cylinder. …