Boletus Laricis. Larch Agaric. A fungus found on the Larch Tree in many parts of Europe. It was proposed by De Haen as a means of diminishing the profuse perspirations of Phthisis; others have employed it with advantage; but, on the unfavourable report of Andral, it has fallen into disuse. It was given in doses of gr. iij. - viij. In doses of gr. xxx. - gr. lx. it is purgative, and in larger doses emetic.