Breathing Diseases
Leave it for two hours, strain it and then add some sugar.
Mallow
(lat. Malva silvestris). 
This plant lives two years, so the root must be picked in the second year,
in the autumn. Use the root and the leaves: 40 - 80 grams per liter of water for tea.
Violet
(lat. Viola odorata). 
It is very useful plant. The root is picked early in the spring, and the
flowers and the leaves when it is fully developed.The most useful part are flowers, the dried ones.
Tea dose: 10. grams to one liter of boiled water.
Lavender
(lat. Lavandula vera). 
Use it as tea in dose: 10. grams to 200. grams of boiled water, four cups a day.
It is very useful if patient inhales the steam as well.
Calamus
(lat. Acorus calamus). 
Use its root. It has aromatic and pleasant taste. Prepare the tea like this:
put 20. grams of the root(cutted into the small pieces) into the half liter of boiled water. Leave it for 20. minutes. Use three cups a day. You can add
some sugar if you want to.
Coltsfoot
(lat. Tussilago farfara). 
Very useful herb. The name "tussilago" itself means "cough suppressant." The blossoms and the leaves are used.
Dose: for tea made of flowers use 10. grams to 200. grams of boiled water. Leaves: put one spoon in the cup of boiled water for 30. minutes;
drink half of the cup before the bed time.