Alpine environments normally develop above the tree line. They are rocky deposits held together by the particularly stout roots of the plants that manage to inhabit them. Here are shrubs or small trees such as mountain pine (Pinus mugo Turra), various types of rhododendrons (Rhododendron sp. pl.), dwarf willows, etc. The sector that reconstructs this environment is in front of the tropical greenhouse (orchid greenhouse). There are several species with protracted blooming periods, such as saxifrage (Saxifraga sp. pl.), edelweiss (Leontopodium alpinum Cass.), several bellflowers, and many others. Next to the Alpine rockery is a small reconstruction of a peat bog, an environment with acid soils soaked with water, typical of temperate, Arctic regions. Vegetation is mostly composed of mosses, such as peat moss (Sphagnum sp. pl.). The accumulation of their dead or partially burnt parts, together with vegetal debris and animal remains, makes up peat. This sector contains various s pecies of these environments, e.g., insectivorous plants such as round-leaved sundew (Drosera rotundifolia L.), butterwort (Pinguicula vulgaris L.), cotton grass (Eriophorum sp. pl.), rush (Juncus sp. pl.), beg bean (Menyanthes trifoliata L.), and a few willows (Salix sp. pl.).