Anggrek bulan (moon orchid)

P. amabilis and the other species in the same genus grow naturally in three distinct habitats. The first is in seasonally dry areas, then seasonally cool areas and last constantly moist or humid areas (Christenson), developing adaptions for each habitat. For the seasonally dry habitats, Phalaenopsis species have an extreme adaptation in which it adopts deciduous habits, losing its leaves. They do this because in dry habitats, leaves are a serious liability when water isn't easily accessible. This adaptation typically occurs in species found outside the Himalayan region. For the habitats that are seasonally cool areas, the species found there are all deciduous or semi-deciduous in nature which means these plants have a strong dormant rest period. In this dormant period, the plants have protection from the cold due to the high carbon to nitrogen ratio and low water content on the leaf tissue. The constantly moist and humid habitats are the most common places that someone can find many of the Phalaenopsis species. In this habitat, the species grow in the canopy evergreen forests. Because they grow in the canopy, the species' adaptation is growing leathery leaves to prevent desiccation and so that the plants can tolerate higher light levels than other species. (wikipedia)