There are densely forested regions around Gangtok, consisting of temperate, deciduous forests of poplar, birch, oak, and elm, as well as evergreen, coniferous trees of the wet alpine zone. Orchids are common, and rare varieties of orchids are featured in flower shows in the city. Bamboos are also abundant. In the lower reaches of the town, the vegetation gradually changes from alpine to temperate deciduous and subtropical. Flowers such as sunflower, marigold, poinsettia, and others bloom, especially in November and December.