The island also contains about 200 rhododendron and azalea varieties. English holly, rhododendron, and magnolia tree species. It ultimately changes into a conifer and rhododendron forest. He also planted rhododendron, bamboo and hydrangea. The forests comprise stands of oak, blue pine, fir, birch, juniper and rhododendron. Azaleas make up two subgenera of "Rhododendron". The trek winds through tall grass, oak and rhododendron forests. Competing with the fruit trees are the flowering ones, mainly rhododendron and magnolia. The first two subgenera ("Rhododendron" and "Hymenanthes") represent the species commonly considered as 'Rhododendrons'. It was built amidst rhododendron and juniper forests. These are evergreen shrubs that belong to the genus "Rhododendron". The evergreen great rhododendron (') is characteristic of moist stream valleys. McLeod Ganj is surrounded by pine, Himalayan oak, and rhododendron. Several alternative plant candidates have been suggested including Cannabis, Hyoscyamus, Rhododendron and Oleander. Sub-alpine forests of birch and rhododendron cover parts of the park's area.