Lemna Minor 1X (Q) (30ml)About SBL Lemna Minor (Mother tincture) Common Name: Duckweed Causes & Symptoms for SBL Lemna Minor (Mother tincture) Due to exposure to damp cold weather or foggy weather, when complaints arise Lemna Minor is of use. Nasal bloackage in winter weather. Rhinitis which cause excessive sneezing and breathing difficulties is relieved with the help of this medicine. Complaints that are worse, in damp, rainy weather, especially heavy rains, are relieved