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Herb Library

Herb Library

Explore 5,320+ detailed herb profiles with safety data, evidence grades, and traditional uses.

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Oregano Oil Capsule

Oregano Oil Capsule

Origanum vulgare (oil capsule)

C — Limited EvidenceLamiaceae

Oregano essential oil in capsule — 150mg per capsule. Very potent antimicrobial. Short-term use (10-14 days). Take with food. Follow with probiotics after course.

Oregano Oil Capsules

Oregano Oil Capsules

Origanum vulgare (enteric)

C — Limited EvidenceLamiaceae

Enteric-coated oregano oil capsules — bypasses stomach to release in intestines. Used for SIBO, candida, and intestinal infections. Stronger than non-enteric.

Oregano Oil Liquid

Oregano Oil Liquid

Origanum vulgare (liquid oil)

C — Limited EvidenceLamiaceae

Liquid oregano oil in olive oil carrier — 2-4 drops under tongue or in water. EXTREMELY potent. Short-term use only (7-14 days). Follow with probiotics.

Oregano Tea

Oregano Tea

Origanum vulgare (tea)

C — Limited EvidenceLamiaceae

Dried oregano steeped as tea — milder than oil but still antimicrobial. Traditional Mediterranean and Mexican cold/flu remedy. Pleasant savory-herbal taste.

Oregon Ash

Oregon Ash

Fraxinus latifolia

T — Traditional UseOleaceae

Native American medicinal plant used as febrifuge, snake bite remedy, anthelmintic, preventive medicine, dermatological aid. Documented among Costanoan, Cowlitz, Karok.

Oregon Barberry

Oregon Barberry

Mahonia nervosa

T — Traditional UseBerberidaceae

A medicinal plant (Mahonia nervosa) from the Berberidaceae family used in traditional medicine.

Oregon Bitterroot

Oregon Bitterroot

Lewisia rediviva

T — Traditional UsePortulacaceae

Native American medicinal plant used as throat aid, breast treatment, gynecological aid, heart medicine, pulmonary aid, blood medicine. Documented among Blackfoot, Flathead, Nez Perce.

Oregon Crabapple

Oregon Crabapple

Malus fusca

T — Traditional UseRosaceae

Native American medicinal plant used as eye medicine, panacea, antirheumatic (internal), dietary aid, diuretic, laxative. Documented among Bella Coola, Cowichan, Gitksan.

Oregon Drops Of Gold

Oregon Drops Of Gold

Prosartes hookeri

T — Traditional UseNartheciaceae

Native American medicinal plant used as poison, love medicine. Documented among Klallam, Makah.

Oregon Fawnlily

Oregon Fawnlily

Erythronium oregonum

T — Traditional UseNartheciaceae

Native American medicinal plant used as dermatological aid. Documented among Wailaki.

Oregon Geranium

Oregon Geranium

Geranium oreganum

T — Traditional UseGeraniaceae

Native American medicinal plant used as antirheumatic (external), antidiarrheal, dermatological aid, oral aid. Documented among Miwok, Montana Indian, Salish.

Oregon Grape

Oregon Grape

Mahonia sp.

T — Traditional UseBerberidaceae

Native American medicinal plant used as dermatological aid, oral aid, blood medicine, cough medicine, gastrointestinal aid. Documented among Cowlitz, Modesse, Quinault.

Oregon Grape Extract

Oregon Grape Extract

Mahonia aquifolium (extract)

B — Good EvidenceBerberidaceae

Standardized for berberine content. Used internally for metabolic health and topically (cream) for psoriasis — clinical evidence for mild-moderate psoriasis.

Oregon Grape Root

Oregon Grape Root

Mahonia aquifolium

C — Limited EvidenceBerberidaceae

A berberine-containing herb used for skin conditions (topically for psoriasis), liver support, and digestive health. Sustainable alternative to Goldenseal.

Oregon Oxalis

Oregon Oxalis

Oxalis oregana

T — Traditional UseOxalidaceae

Native American medicinal plant used as eye medicine, dietary aid, other, antirheumatic (external), dermatological aid, disinfectant. Documented among Cowlitz, Karok, Makah.

Oregon White Oak

Oregon White Oak

Quercus garryana

T — Traditional UseFagaceae

Native American medicinal plant used as tuberculosis remedy, gynecological aid. Documented among Cowlitz, Karok.

Oriental Pipewort

Oriental Pipewort

Eriocaulon sp

T — Traditional UseEriocaulaceae

Traditional medicinal plant used for ache(head), anodyne, cephalgia, epistaxis, hemicrania, opacity, sunstroke, vermifuge.

Oriental Storax

Oriental Storax

Liquidambar orientalis

T — Traditional UseHamamelidaceae

Traditional medicinal plant used for antidote, antiseptic, cancer, cold, convulsion, cough, epilepsy, expectorant, and other conditions. Known from ethnobotanical records across multiple cultures.

Orosped Thyme

Orosped Thyme

Thymus orospedanus

T — Traditional UseLamiaceae

A medicinal plant (Thymus orospedanus) from the Lamiaceae family used in traditional medicine.

Oroxylum

Oroxylum

Oroxylum indicum

C — Limited EvidenceBignoniaceae

Southeast Asian tree used across Thai, Indian, and Chinese medicine for diarrhea, dysentery, and respiratory conditions. Bark is a key ingredient in Ayurvedic Dasamoola (ten roots) formula. Contains baicalein and chrysin flavonoids.

Orris

Orris

Iris x germanica

T — Traditional UseIridaceae

A medicinal plant (Iris x germanica) from the Iridaceae family used in traditional medicine.

Osage-Orange

Osage-Orange

Maclura pomifera

T — Traditional UseMoraceae

Traditional medicinal plant used for cardiac, collyrium, poison, stimulant, tenderizer, wart.

Osha

Osha

Ligusticum porteri

T — Traditional UseApiaceae

A sacred Native American herb from the Rocky Mountains used for respiratory support, sore throat, and as a first-line immune herb. Difficult to cultivate.

Osha Root

Osha Root

Ligusticum porteri

C — Limited EvidenceApiaceae

Rocky Mountain respiratory powerhouse — Native American cold/flu remedy. For upper respiratory infections, sore throats, and altitude sickness. Bears dig it up after hibernation (hence "Bear Root"). Endangered — never wildcrafted.

Osmanthus

Osmanthus

Osmanthus fragrans

T — Traditional UseOleaceae

A Chinese flower tea with sweet apricot-like flavor. Used for lung health, skin beauty, and digestive comfort. Traditionally reduces phlegm.

Ostrich fern

Ostrich fern

Matteuccia pennsylvanica

T — Traditional UseDryopteridaceae

A medicinal plant (Matteuccia pennsylvanica) from the Dryopteridaceae family used in traditional medicine.

Otaheite chestnut

Otaheite chestnut

Inocarpus edulis

T — Traditional UseFabaceae

Traditional medicinal plant used for antidote(fish), astringent, bloodshot, diarrhea, enterosis, eye, hemorrhage, medicine, and other conditions. Known from ethnobotanical records across multiple cultures.

Otostegia

Otostegia

Otostegia persica

C — Limited EvidenceLamiaceae

Iranian and Baluchistan medicinal shrub used for diabetes, fever, and headache in traditional Baluchi and Persian medicine. Contains iridoid glycosides and flavonoids with demonstrated hypoglycemic activity. Also used as insect repellent.

Ouabain

Ouabain

Strophanthus gratus

T — Traditional UseApocynaceae

Traditional medicinal plant used for poison(arrow).

Ovalleaf Blueberry

Ovalleaf Blueberry

Vaccinium ovalifolium

T — Traditional UseEricaceae

Native American medicinal plant used as gynecological aid. Documented among Makah.

Ovalleaf Clustervine

Ovalleaf Clustervine

Jacquemontia ovalifolia

T — Traditional UseConvolvulaceae

Native American medicinal plant used as dermatological aid, pediatric aid, strengthener. Documented among Hawaiian.

Ovalleaf Knotweed

Ovalleaf Knotweed

Polygonum arenastrum

T — Traditional UsePolygonaceae

Native American medicinal plant used as gynecological aid, love medicine, orthopedic aid, veterinary aid. Documented among Iroquois.

Overnight Oats

Overnight Oats

Avena sativa (soaked)

B — Good EvidencePoaceae

Oats soaked overnight in milk/yogurt with chia seeds — the most popular functional breakfast. Provides beta-glucan fiber for cholesterol and gut health. No cooking needed.

Owlsclaws

Owlsclaws

Hymenoxys hoopesii

T — Traditional UseAsteraceae

Native American medicinal plant used as analgesic, respiratory aid, antiemetic. Documented among Great Basin Indian, Navajo.

Oxeyedaisy

Oxeyedaisy

Leucanthemum vulgare

T — Traditional UseAsteraceae

Native American medicinal plant used as eye medicine, febrifuge, tonic, dermatological aid. Documented among Iroquois, Menominee, Mohegan.

Ox-Eye Daisy

Ox-Eye Daisy

Leucanthemum vulgare

T — Traditional UseAsteraceae

European folk remedy for whooping cough, asthma, and as a wound wash; used similarly to chamomile in rural traditions.

Oyster Mushroom

Oyster Mushroom

Pleurotus ostreatus

C — Limited EvidencePleurotaceae

A widely cultivated mushroom with natural statin-like compounds (lovastatin). Studied for cholesterol, blood sugar, and immune support.

Pacific Anemone

Pacific Anemone

Pulsatilla patens

T — Traditional UseRanunculaceae

Native American medicinal plant used as abortifacient, analgesic, dermatological aid, gynecological aid, cold remedy, panacea. Documented among Blackfoot, Carrier, Southern, Cheyenne.

Pacific Blacksnakeroot

Pacific Blacksnakeroot

Sanicula crassicaulis

T — Traditional UseApiaceae

Native American medicinal plant used as dermatological aid, snake bite remedy. Documented among Miwok.

Pacific Bleedinghearts

Pacific Bleedinghearts

Dicentra formosa

T — Traditional UsePapaveraceae

Native American medicinal plant used as anthelmintic, dermatological aid, toothache remedy. Documented among Skagit.

Pacific Dewberry

Pacific Dewberry

Rubus vitifolius

T — Traditional UseRosaceae

Native American medicinal plant used as antidiarrheal, dermatological aid, disinfectant. Documented among Costanoan, Mendocino Indian.

Pacific Dogwood

Pacific Dogwood

Cornus nuttallii

T — Traditional UseCornaceae

Native American medicinal plant used as cathartic, emetic, tonic, herbal steam, laxative, blood medicine. Documented among Green River Group, Hoh, Karok.

Pacific Hemlockparsley

Pacific Hemlockparsley

Conioselinum gmelinii

T — Traditional UseApiaceae

Native American medicinal plant used as cold remedy, throat aid, antirheumatic (external), herbal steam, stimulant. Documented among Aleut, Kwakiutl.

Pacific Hound's Tongue

Pacific Hound's Tongue

Cynoglossum grande

T — Traditional UseBoraginaceae

Native American medicinal plant used as burn dressing, gastrointestinal aid, venereal aid. Documented among Concow, Pomo, Potter Valley.

Pacific Madrone

Pacific Madrone

Arbutus menziesii

T — Traditional UseEricaceae

Native American medicinal plant used as gastrointestinal aid, emetic, burn dressing, dermatological aid, misc. disease remedy, ceremonial medicine. Documented among Cahuilla, Concow, Cowichan.

Pacific Monardella

Pacific Monardella

Monardella odoratissima

T — Traditional UseLamiaceae

Native American medicinal plant used as diaphoretic, love medicine, cold remedy, febrifuge, pediatric aid, analgesic. Documented among Karok, Miwok, Okanagan-Colville.

Pacific Ninebark

Pacific Ninebark

Physocarpus capitatus

T — Traditional UseRosaceae

Native American medicinal plant used as emetic, antidote, antirheumatic (external), antirheumatic (internal), laxative, cathartic. Documented among Bella Coola, Green River Group, Hesquiat.

Pacific Oakfern

Pacific Oakfern

Gymnocarpium disjunctum

T — Traditional UseDryopteridaceae

Native American medicinal plant used as other. Documented among Abnaki.

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