Encyclopedia of Medicinal Plants Uses and Identification




1.      Haemanthus coccineus

2.    Haematoxylum campechianum

3.    Halimione portulacoides

4.    Halleria lucida

5.     Hamamelis virginiana

6.    Hammarbya paludosa

7.     Hasteola suaveolens

8.    Hedera helix

9.    Hedypnois rhagadioloides

10.            Hedysarum alpinum

11.  Hedysarum coronarium

12.Helenium autumnale

13.Helianthus agrestis

14.Helianthus angustifolius

15. Helianthus annuus

16.Helianthus atrorubens

17. Helianthus decapetalus

18.Helianthus divaricatus

19.Helianthus giganteus

20.          Helianthus tuberosus

21.Heliconia bihai

22.           Helicteres isora

23.           Helictotrichon pratense

24.           Heliocarpus americanus

25.           Heliopsis helianthoides

26.           Heliotropium curassavicum

27.           Heliotropium europaeum

28.           Heliotropium indicum

29.           Helleborus foetidus

30.          Helleborus niger

31.Helleborus viridis

32.           Helminthostachys zeylanica

33.           Helminthotheca echioides

34.           Helonias bullata

35.           Hemerocallis fulva

36.           Hemidesmus indicus

37.           Henna

38.           Heracleum sphondylium

39.           Herminium monorchis

40.          Herniaria glabra

41.Herniaria hirsuta

42.           Hesperis matronalis

43.           Heuchera americana

44.           Hexastylis virginica

45.           Hibiscus moscheutos

46.           Hibiscus mutabilis

47.           Hibiscus rosa-sinensis

48.           Hibiscus sabdariffa

49.           Hibiscus syriacus

50.           Hibiscus tilliaceus

51. Hibiscus trionum

52.           Hieracium alpinum

53.           Hieracium amplexicaule

54.           Hieracium gronovii

55.            Hieracium murorum

56.           Hieracium paniculatum

57.            Hieracium pilosella

58.           Hieracium sabaudum

59.           Hieracium venosum

60.          Himantoglossum hircinum

61.Hippocrepis comosa

62.           Hippomane mancinella

63.           Hippomane spinosa

64.           Hippophae rhamnoides

65.           Hippuris vulgaris

66.           Hiptage benghalensis

67.           Holcus lanatus

68.           Holosteum umbellatum

69.           Homogyne alpina

70.           Honckenya peploides

71. Honey locust

72.           Hordeum jubatum

73.           Hordeum murinum

74.           Hordeum vulgare

75.            Horminum pyrenaicum

76.           Hornungia procumbens

77.            Horseradish

78.           Hottonia palustris

79.           Houstonia caerulea

80.          Houstonia purpurea

81.Humulus lupulus

82.           Huperzia phlegmaria

83.           Hura crepitans

84.           Hyacinthoides italica

85.           Hyacinthoides non-scripta

86.           Hyacinthus orientalis

87.           Hydrangea arborescens

88.           Hydrocharis morsus-ranae

89.           Hydrocotyle umbellata

90.          Hydrocotyle vulgaris

91.Hydrophyllum virginianum

92.           Hylotelephium telephium

93.           Hymenaea courbaril

94.           Hymenocallis caribaea

95.           Hymenocallis caroliniana

96.           Hyoscyamus niger

97.           Hypericum androsaemum

98.           Hypericum balearicum

99.           Hypericum canariense

100.      Hypericum hirsutum

101.        Hypericum humifusum

102.      Hypericum mutilum

103.      Hypericum olympicum

104.      Hypericum perforatum

105.       Hypericum pulchrum

106.      Hyphaene thebaica

107.       Hypochaeris glabra

108.      Hypochaeris radicata

109.      Hypoxis hirsuta

110.        Hyssopus officinalis


Hypericum perforatum

  • St. John's wort (Hypericum perforatum)

See the main article on this topic: St. John's wort

  • Used for: calming, bedwetting, insomnia, "nervous conditions", depression, anemia, headache, jaundice, congestion, and menstrual difficulties
  • Regarded by herbalists and some medical authorities as an effective treatment for depression; trials are mixed, partly due to depression's high susceptibility to the placebo effect. Popular in Germany. May interfere with effectiveness of other drugs.
  • Harmful effects: may cause cataracts in people exposed to visible or ultraviolet light after taking it. Other side effects may include gastrointestinal disturbances, allergic reactions, fatigue, dizziness, confusion, dry mouth, photosensitivity, mania and psychosis


Hyoscyamus niger

  • Henbane  (Hyoscyamus niger)
  • Used for: pain, nervousness, irritability, Parkinson's disease symptoms, and ulcers. It is also smoked to "cure" asthma and bronchitis (sounds familiar). There is no evidence to support its use for any of these conditions.
  • Harmful effects: Henbane is toxic, and when used for self-treatment may result in fatal poisoning. Side effects may include dry mouth, red skin, constipation, overheating, reduced sweating, vision disturbances, increased heart rate, urination problems, drowsiness, restlessness, hallucinations, delirium, manic episodes, and death. Mostly death.
  • For a while, henbane berries were used in the manufacture of an herbal beer flavoring called "gruit", which was flavored with various sweet and bitter herbs, before people began using hops. Gruit fell out of favor during the Middle Ages when the Reinheitsgebot declared that all beers in the Holy Roman Empire could only be made with barely (Hordeum vulgare), hops (Humulus lupulus), water, and yeast.


Hydrastis canadensis

  • Goldenseal  (Hydrastis canadensis)
  • Used for: vaginal douching, mouthwash, periodontal disease, congestion, laxative, stomach ailments, skin diseases, and nausea relief during pregnancy. Also used for "immune system boosting".
  • Effectiveness: The evidence doesn't suggest Goldenseal is effective for any condition.
  • Harmful effects: Small doses may be fine, except during pregnancy or breastfeeding, since goldenseal might cause brain damage to the baby."High doses may cause breathing problems, paralysis, and even death. Long-term use may lead to vitamin B deficiency, hallucinations, and delirium."It may also affect blood pressure unpredictably because it contains several different compounds that have opposite effects on blood pressure. It can also make you more sensitive to light. A cancer study of goldenseal root powder in mice and rats showed that it "caused cancer in the liver of male and female rats and male mice. There was no effect of goldenseal root powder on female mice."


Harpagophytum procumbens

  • Devil's claw  (Harpagophytum procumbens)
  • Usage: Effective for osteoarthritis pain. Insufficient study has been done to evaluate its effectiveness for anything else.
  • Harmful effects: Side effects may include diarrhea, nausea, vomiting, abdominal pain, headaches, ringing in the ears, loss of appetite, and loss of taste. Other side effects may include allergic skin reactions, menstrual problems, and changes in blood pressure. Use of devil's claw during pregnancy is not advised, as it may harm the fetus.