Scientific Name Rhododendron anthopogon D. Don Family Ericaceae Used Part Stem, Leaves, buds. Distribution Area A small shrub found in Alpine Himalayas of Nepal from 3300-4000 and also in the Himalayas from Kashmir to Bhutan and the N.E.F.A. hills at altitudes of 3,000-5,300 m. Common Uses . The leaves are reported to possess stimulant properties. The plant yields an incense. Leaves aromatic, stimulant, admimistered as an errhine to produce sneezing. Their smoke is considered useful in some diseases. They are supposed to have stimulant properties. This is one of the species which is thought by the bhutias(local people who give support to climbers) to excite the headache and nausea which attend ascents to the high elevations of the eastern himalayas.

Jatropha curcus General introduction Jatropha is bush that grows in the warm regions of the world as it is sensitive to colder climates. Once it’s planted it grows and produces nuts that contain oil within a few years, and produces these annually for up to 50 years. Climate requirement for the plant is as altitude: 0-500 meters above sea level. mild-annual temperature: 20-28 °C.annual rainfall: 300-1000 mm., or more. Jatropha has been grown in developing countries for many years it’s been used locally for production of oil that was used in local village based industries for soap production. Since the plants are toxic they have also been used to plant hedges and to keep animals out of areas of land. Botany

Nanotechnology refers to research and technology development at the atomic, molecular and macromolecular scale leading to the controlled manipulation and study of structures and devices with the length scale in the 1 to 100 nanometers range ( McNeil 2005 ). It is also defined as the interdisciplinary science involved in diagnosis, treatment, monitoring and control of biological systems ( Fortina et al., 2006 ). Nanosized materials have been investigated as the potential medicines since several decades ( Garnett and Kallinteri, 2006, Gwinn and Vallyathan, 2006 ) for many chronic diseases as well as disorders, nano medicines offers the potential and hope for a cure and promises to give improved therapy and diagnostic ( Gabriel and Silva, 2004 ).

Scientific Name Piper longum Linn Family Piperaceae Used Part Dried spike Distribution Area A climber occurring in the hotter parts of India, from Central Himalayas to Assam, Khasi and Mikir hills, lower hills of Bengal, and evergreen forests of western ghats from Konkan to Travancore: and also from Car Nicobar Islands.

Scientific Name Saraca asoca (Roxb.) De Wilde syn. S. indica auct. non Linn.

Family Caesalpiniaceae (Fabaceae)

Used Part Bark.

Distribution Area It occurs almost throughout India up to an altitude of 750 m. in the central and the eastern Himalayas and the

Khasi, Garo and Lushai hills; it is also found in the Andaman Islands.

Scientific Name Nardostachys grandiflora DC. (=N. jatamansi DC.) Family Valerianaceae Used Part Rhizome Distribution Area Found in the alpine Himalayas from Punjab to Sikkim and Bhutan, at altitudes of 3,000-5,000 m.