Botanical Overview
Giant Taro (Alocasia macrorrhiza) is a flowering plant in the Araceae family. The traditional uses of this species reflect its genuine medicinal value, validated by generations of practical experience. The arum family (Araceae) includes herbs, climbers, and aquatics with a distinctive inflorescence consisting of a fleshy spike (spadix) surrounded by a modified leaf (spathe). Many species produce calcium oxalate crystals and acrid compounds that cause intense irritation. Despite this, several are used medicinally after proper preparation.
General Description
It has long been cultivated in South Asia, the Philippines, many Pacific islands, and elsewhere in the tropics, in the order of tens of thousands of years. Common names include giant taro, giant alocasia, ʻape, biga, and pia. In Australia it is known as the cunjevoi.
Family Context
The Araceae family is widely distributed. Notable medicinal members include:
- Jack-In-The-Pulpit — 34 documented uses
- Taro — 34 documented uses
- Skunk Cabbage — 33 documented uses
- Dumbcane — 27 documented uses
Traditional Uses
Giant Taro has been traditionally used for digestive health, respiratory conditions, and skin and wound care, among other applications.
Digestive health.
- Diarrhea
For digestive complaints, the herb is typically prepared as a tea or decoction taken before meals. The bitter compounds stimulate digestive secretions and improve nutrient absorption. Some traditions use the powdered root or leaves in small doses as a stomachic tonic.
Respiratory conditions.
- Cough
Respiratory conditions are addressed through steam inhalation of the herb’s vapors or internal use as a warm tea. The hot infusion acts as an expectorant, helping to loosen phlegm and clear congestion. Some traditions combine it with honey for coughs.
Skin and wound care.
- Burn
- Sore
For skin conditions, the fresh or dried plant is applied topically as a poultice, wash, or compress. A strong decoction can be used to clean wounds and sores. The antimicrobial properties help prevent infection while promoting tissue repair.
Active Compounds
Phytochemical research has identified 30 compounds in this species, including a diverse array of phytochemical classes (see the Complete Chemical Inventory below for the full list).
The identified compounds include the following categories:
- Alkaloid: nitrogenous compounds with diverse pharmacological activities