From plant to use
Hot water poured over leaves and flowers: the simplest and most widely used preparation.
For an infusion you pour hot water over soft plant parts such as leaves, flowers and fine herbs and let them steep, covered. Flavour and aroma pass into the water without long heating. Almost every tradition knows this form, from European herbal teas and South American mate to North African mint tea.
Registry
Herbs on this site whose description mentions this preparation. That does not mean every herb is safe to prepare yourself: read the safety information for each one.
CautionSouth America · Herb · № 982
Souroubea guianensis
A low shrub or climber of the Marcgraviaceae family, with nectar cups that attract butterflies and moths. From two related Central American species (S. sympetala and S. gilgii) researchers isolated substances that reduce anxiety in animals: betulinic acid and amyrins. In people this has hardly been studied.
CautionNorth America · Herb · № 998
Oxydendrum arboreum
A tree of the heath family with drooping sprays of white, bell-shaped flowers in summer and fiery red autumn leaves. The leaves taste sour, hence the name. From the flowers bees make a light, much-prized honey.
CautionAsia · Herb · № 538
Phyllanthus fraternus
Traditionally attributed effects: diuretic, astringent, cooling, laxative, bitter tonic; for oedema, gonorrhoea, urogenital diseases, jaundice, constipation, stomach ache, indigestion, dysentery, mild intermittent fever, heavy menstruation.
CautionCentral America and the Caribbean · Herb · № 456
Cassia tora
Traditionally attributed effects: mildly laxative, cleansing; intestinal complaints and fever when teething, compress for gout, sciatica and joint pain; seeds for ringworm, scabies and eczema; root for snake bites.
CautionEurope · Herb · № 298
Chelidonium majus
Traditionally attributed effects: diuretic, cleansing, stimulates the liver, anti-inflammatory.
CautionAsia · Herb · № 534
Paederia foetida
Traditionally attributed effects: diuretic, anti-inflammatory, antispasmodic; for urinary retention, bladder stones, haemorrhoids, inflamed spleen, diarrhoea in children, rheumatism and stiff joints, abdomen bloated by gas.
CautionEurope · Herb · № 236
Calluna vulgaris
The flowering herb was drunk as tea for bladder complaints and sleeplessness. Heather honey is a prized, jelly-like honey. A medicinal effect has not been studied.
CautionAsia · Herb · № 512
Hygrophila auriculata
Traditionally attributed effects: root cooling, bitter tonic, diuretic, soothing; seeds diuretic and aphrodisiac; for oedema, kidney stones and urogenital complaints, jaundice, impotence and weakness, asthma.
CautionAfrica · Herb · № 549
Salvadora persica
Traditionally attributed effects: carminative, diuretic, decongestant; leaves for rheumatism, scurvy, painful tumours, haemorrhoids, asthma and cough; flower oil for flatulence, mucus, worms, leprosy, gonorrhoea, headache and rheumatic pain.
CautionAsia · Herb · № 195
Taxus baccata
Traditionally attributed effects: carminative, expectorant, stomachic, tonic; leaf and fruit promote menstruation, calming, antispasmodic; for asthma, hiccups, indigestion, coughing up blood, epilepsy, stones, nervousness.
CautionEurope · Herb · № 98
Thymus vulgaris
Traditionally used for coughs and bronchitis; thymol from the oil inhibits bacteria and fungi in the laboratory. There are some studies of thyme-based cough syrups.
CautionAsia · Herb · № 570
Zanthoxylum alatum
Traditionally attributed effects: tonic, stomachic, carminative, aromatic; for fever, indigestion, cholera and toothache.
CautionAfrica · Herb · № 467
Coccinia indica
Traditionally attributed effects: cleansing, laxative (bark), antispasmodic and expectorant (leaf and stem), lowers blood sugar; for incipient diabetes, swollen glands, skin diseases, smallpox rash, gonorrhoea, bronchitis.
CautionNorth America · Herb · № 152
Hamamelis virginiana
Strongly astringent due to tannins. Witch hazel water and ointment are used externally for minor skin irritation, bruises and haemorrhoids; there is limited but reasonably supportive evidence.
CautionNorth America · Herb · № 947
Epigaea repens
A creeping, evergreen dwarf shrub of the heath family with fragrant pink to white flowers in early spring. Contains arbutin.
CautionNorth America · Herb · № 945
Sarracenia purpurea
A carnivorous plant with pitcher-shaped leaves that hold rainwater, in which insects drown. Little research exists on effects in people.
CautionAsia · Herb · № 497
Ficus racemosa
Traditionally attributed effects: astringent, carminative, stomachic, kills worms, lowers blood sugar; wound rinse, for dysentery, bile complaints, haemorrhoids, diarrhoea, mouth ulcers, heavy menstruation, coughing up blood, sore throat, diabetes.
CautionNorth America · Herb · № 993
Liriodendron tulipifera
The tallest broadleaf tree of eastern America, up to almost sixty metres, of the magnolia family, with tulip-shaped greenish-yellow flowers with an orange patch. The bark is bitter and contains the alkaloid liriodenine and sesquiterpenes that inhibit bacteria and fungi; it was formerly used as a tonic and quinine substitute. The flowers give much nectar for a dark honey.
CautionAsia · Herb · № 40
Ocimum tenuiflorum
An aromatic plant drunk as herbal tea; treatment claims are not established.
CautionAsia · Food · № 240
Allium cepa
Traditionally attributed effects: stimulating, diuretic, expectorant, skin-irritant, aphrodisiac, antiseptic; for cough, haemorrhoids, jaundice, indigestion, insect bites, boils, wounds, chilblains and sore joints.
CautionEurope · Herb · № 20
Valeriana officinalis
The root has a traditional association with sleep and calm. Research on insomnia is inconsistent and does not establish benefit.
CautionEurope · Herb · № 72
Foeniculum vulgare
The seed is traditionally used for wind, bloating and cramps. There are some small studies, but evidence is limited.
CautionAsia · Herb · № 403
Adiantum philippense
Traditionally attributed effects: antipyretic, diuretic, cleansing, expels worms, cooling; for cough and respiratory complaints, fever, leprosy, erysipelas.
CautionEurope · Herb · № 230
Potentilla reptans
The tannin-rich herb was used as a mouthwash and for diarrhoea. A medicinal effect has not been studied.
CautionNorth America · Food · № 937
Fragaria virginiana
A wild strawberry with small, very tasty fruits. Its cross with the Chilean strawberry gave rise to the garden strawberry in eighteenth-century Europe.
CautionNorth America · Herb · № 285
Lycopus virginicus
Traditionally attributed effects: calming, astringent, tonic, vasoconstricting, cough-suppressing, stops bleeding.
CautionEurope · Food · № 83
Linum usitatissimum
Ground flaxseed acts as a gentle bulk-forming fibre for constipation. NCCIH reports it may lower cholesterol slightly; evidence for other claims is unclear.
CautionEurope · Food · № 21
Sambucus nigra
Berries have a folk-use history for cold and flu symptoms; clinical evidence remains preliminary.
CautionAsia · Herb · № 466
Clitoria ternatea
Traditionally attributed effects: root mildly laxative, diuretic, expels worms; seeds strongly laxative; for ascites, enlarged abdominal organs, migraine (flower juice), gonorrhoea, bladder irritation, ulcers, swollen joints.
CautionEurope · Herb · № 94
Stellaria media
Traditionally used externally as a cooling ointment or compress for itching, eczema and minor skin irritation. There is hardly any clinical research.
CautionEurope · Herb · № 58
Alchemilla xanthochlora
An astringent herb used in folk medicine mainly for heavy periods and diarrhoea. There is little clinical research.
CautionNorth America · Herb · № 586
Cypripedium parviflorum (syn. C. pubescens)
Traditionally attributed effects: strengthens the nerves, antispasmodic, tonic, relaxing, diuretic; for menstrual pain and irregular menstruation, overstimulated nerves and insomnia from stress, pain-relieving.
CautionEurope · Food · № 80
Juglans regia
The nuts are a nutritious source of unsaturated fats. Leaf and green husk are astringent and were traditionally used for skin conditions and diarrhoea; clinical evidence is lacking.
CautionAsia · Herb · № 479
Cuscuta reflexa
Traditionally attributed effects: carminative, expels worms, cleansing, antispasmodic; for stomach ache, constipation, flatulence, liver complaints, bile complaints; externally for itching and skin diseases.
CautionEurope · Herb · № 106
Menyanthes trifoliata
A strong bitter traditionally used to stimulate appetite and digestion and for rheumatic complaints. Clinical evidence is lacking.
CautionEurope · Herb · № 86
Plantago major
The leaf is traditionally bruised and applied to insect bites, small wounds and grazes, and taken as tea for coughs. Clinical evidence is limited.