Crataegus L.

And blooming time are 3-5 days and preparing time doing on this time, as not buttons preparing,they are brown in dryness, damaging and blooming out flowers also bad, ands prepared mass in baskets put, not pressing, after in 2 hours put in oven for dry on 40C, or in air under closed top, or good ventilated room, flowers put a thin layer is on sheet or fabric, fruits ripe keep in oven at 70C, on nets.
As of flowers, fruits found are 40 substances of flavonoids nature, these are tannins, triterpenoids, organic acids, polysaccharides,amino acids, fatty acids, essential oils, vitamin c, carotene. Crataegus preparations are tone for heart muscle  and lowering her nervousness,regulating heart rhythm, fighting and preventing arrhythmia, improving coronary and brain blood circulation, rising a heart sensitiveness to the heart glycosids, regulates tone of heart system, normalizing for arterial presssure, lowering anxiety, improves sleep.
And effectively in long using as of liquid infusion fruits which use are 30-40 drops before meal for 3-4 times/day, and use as drops of crataegus, and water infusions cooking of by a whole rules and use one tbl.sp. infusion of flowers, and 0.5 glass are infusion of fruits for 4 times/day before meal.