ROLANDER, Daniel (ro'-lan-dair), Swedish naturalist, born in the province of Smaaland in 1720: died in Lund in 1774. After receiving his education in Upsala he became preceptor of the children of Linnaeus, and engaged later in botanical researches under the direction of the great naturalist. At Linnaeus's suggestion, he accompanied to Surinam a wealthy citizen of the colony, and on his arrival, 20 June, 1755, began immediately to explore the country. After studying the flora of tile province of Paramaribo, he sojourned several months on the banks of Commewyn river, where he engaged in geological an(1 botanical researches. Being defeated in an attempt to explore the interior of Guiana, through an uprising of the slaves, he went to St. Eustatius, in February, 1756, and made a thorough study of the flora of the island, returning to Stockholm, 20 October, with rich collections and a herbarium of 1,500 plants. As he had difficulties with Linnaeus, who wished to make free use of the collections, and the privilege of printing his works having meanwhile been refused by the government, Rolander sold his manuscripts and collections to Professor Rottboell, of Copenhagen, and retired to private life. His works include " Descriptio et iconum rariorium et, pro maxima parte, novas plantas, illustrium" edited by Professor Rottboell (Copenhagen, 1773); " Obserwttiones ad genera qua-dam rariora exoticarum plantarum" (1776) : and "Descriptiones rarium plantarum in Guiana crescentium" (1776). The two last works were published by theMedical society of Copenhagen. The Danish government afterward bought, from the heirs of Professor Rottboell, Rolander's manuscripts and collections, which are now preserved in the museum at Copenhagen. His journal has been published, " Diarum Surinamense" (2 vols., 1840).