Juncus. Juncus effusus. Soft Rush. N. O. Juncaceae. Tincture (of root probably).   Clinical.-Asthma. Backache. Calculus. Catarrh. Dropsy. Flatulence. Headache. Kidney, diseases of. Rheumatism. Scars, affections of.   Characteristics.-Juncus was