Haustoria or parasitic roots are present in Cuscuta. The plants which depend on other plants are called as parasitic plants and the plant which gives shelter and food material to the parasite is called as the host plant. Parasitic plants produce special adventitious roots called as parasitic roots or haustoria which penetrate into the roots or shoots of the host plant to absorb food and other required nutrients.
Epiphytes mostly belong to family Orchidaceae. Vanda is the most common example of the epyphytic plants of the orchidaceae family. Epiphytic orchids have thick, flattened, photosynthetic roots and without any formal organisation of leaves. Their roots are green, aerial and adventitious which help in photosynthesis.
The plants which depend on other plants are called as parasitic plants. Here the plant which gives shelter and food material to the parasite is called as the host plant. Parasitic plants produce special adventitious roots called as parasitic roots or haustoria which penetrate into the roots or shoots of the host plant to absorb food and other required nutrients.
Roots developing from the radicle are called as normal roots and the roots developing from any other part of the plant except radicle are called adventitious roots.
