11.  Write the scientific names with their utility of the following plants.

a)  Chinchonia

b)  Neem

c) Rauwolfia

Or

Write the scientific names and their families of three important timber yielding plants of Assam.

Dear student,
Scientific name of cinchona:- Cinchona officinalis
​The bark obtained from the plant contains quinine which is useful in treating malaria.
​Scientific name of neem:- Azadirachta indica
Neem is used as mosquito and insect repellant and therefore used while storing rice. It is also used as medicine in ayurveda and siddha due to its antibacterial, antifungal and sedative purpose.
​Scientific name of Rauwolfia:- Rauvolfia tetraphylla
An alkaloid called reserpine is obtained from rauwolfia and is used as anti hypersensitive drug which is used in ayurveda and unani as a medicine.

Regards

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