The Institute's LE Herbarium has approximately 200,000-250 000 specimens from Latin America in storage. The most known collections from Latin America include those of German naturalist G. Langsdorff (collected between 1814-1817 & 1821-1829) and German botanist Ludwig Riedel (1821-1828 & 1831-1836) from Brazil, G. Mertens (1826) and German naturalist Wilhelm Friedrich Karwinsky von Karwin (1841-1843) from Mexico, and plants collected in expeditions of the Soviet Rubber Trust in 1926-1928.[1]