Piper obliquum
StarPiper obliquum
Synonyms: Piper ligatispicum, Steffensia insignis, Piper subtropicum var. tomentellum, Piper sanguineispicum, Piper submelanostictum, Artanthe insignis, Piper submelanostictum var. amelanostictum, Piper oparumaense, Piper nanegalense, Steffensia caracasana, Piper decorticans, Piper molanoi, Piper puberulibracteum var. monticola, Piper aristeguietae, Piper striatinervosum, Piper puberulibracteum, Piper insigne, Artanthe flagellaris, Piper caracasanum, Piper arbelaezii var. flavibracteum, Artanthe moritziana, Piper caudefactum, Piper flagellare, Piper nudibracteatum var. micropuberulum, Piper moritzianum, Piper nudibracteatum var. pubescens, Piper saramaccanum, Piper caracasanum var. firmius, Piper praeclarum, Piper infidele, Piper sasaimanum, Piper pseudonobile, Steffensia obliqua, Piper mandinganum, Piper pennellii, Piper aequilaterum, Piper elmetanum, Artanthe caracasana, Piper spoliatum, Piper subtropicum, Piper obliquum var. subeximium, Piper nudibracteatum, Piper statum, Artanthe superba, Piper obliquum var. apterum, Piper obliquum var. sprucei, Piper obliquum var. puberulidrupum
Western Herbalism Properties
Traditional Uses
In Guyana and Ecuador, where the aromatic plant is known as "Anis del Oriente," the leaves of Piper obliquum are applied topically as an analgesic and to relieve arthritic pain (Guerrini et al., 2009).
Botanical Description
Piper obliquum is a shrub or small tree of the pepper family (Piperaceae) native to the lowland tropics of Central and South America, where it grows in secondary rainforest, forest margins and disturbed clearings. Like other members of its genus it has swollen, jointed nodes and alternate, simple leaves that are distinctly asymmetric or oblique at the base, a feature reflected in its name; the leaves are aromatic, releasing an anise-like scent when crushed. The minute flowers lack petals and are densely packed onto slender, erect or curving fleshy spikes (the characteristic Piper inflorescence) borne opposite the leaves, maturing into tiny one-seeded fruits. The plant is rich in essential oils dominated by safrole. It is a fast-growing component of regenerating neotropical forest, often forming thickets in light gaps and along trails and watercourses.
Active Constituents
Safrole
Phenylpropanoid (methylenedioxy)Concentration: Dominant essential-oil component (~45.8% of the leaf/aerial-part oil in an Ecuadorian population)
Safrole is the principal volatile constituent of P. obliquum essential oil and gives the plant its anise-like aroma (local name "Anís del Oriente"). It contributes antimicrobial and insecticidal properties, but safrole is also a recognised rodent hepatocarcinogen and a regulated substance, which limits any internal medicinal use of the oil.
Obliquol A
AlkenylphenolConcentration: Minor isolated constituent
A new alkenylphenol isolated from P. obliquum reported to show antibacterial activity comparable to ampicillin in the source study, part of the family of long-chain alkenylphenols (gibbilimbol-type) characteristic of the genus.
Obliquol B
AlkenylphenolConcentration: Minor isolated constituent
A second novel alkenylphenol from P. obliquum with potent anti-inflammatory activity, inhibiting the TNFα-induced NF-κB signalling pathway at an early step; it also displayed antibacterial activity.
4-Chromanone derivative
Benzopyranone (chromanone)Concentration: Minor isolated constituent
A new 4-chromanone was among the compounds isolated during phytochemical study of the plant; chromanones of this type contribute to the antioxidant and antimicrobial chemistry reported across Piper species.
Preparation Methods
Essential oil / aromatic distillate (ethnobotanical, non-ingested)
Parts: Leaves, Aerial parts
The safrole-rich aromatic oil has been characterised chiefly for research and ethnobotanical interest rather than as a validated therapy. Safety warning: safrole is a known hepatocarcinogen in animals and is a controlled/regulated chemical in many jurisdictions; the oil should not be taken internally. No standardised human dosing exists.
References
- Valdivia C, Marquez N, Eriksson J, Vilaseca A, Muñoz E, Sterner O. Bioactive alkenylphenols from Piper obliquum . Bioorganic & Medicinal Chemistry (2008) [DOI]
- Guerrini A, Sacchetti G, Rossi D, Paganetto G, Muzzoli M, Andreotti E, Tognolini M, Maldonado ME, Bruni R. Bioactivities of Piper aduncum L. and Piper obliquum Ruiz & Pavon (Piperaceae) essential oils from Eastern Ecuador . Environmental Toxicology and Pharmacology (2009) [DOI]
- Salehi B, et al.. Piper Species: A Comprehensive Review on Their Phytochemistry, Biological Activities and Applications . Molecules (2019) [DOI]
This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.
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