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Alocasia macrorrhiza
Pronunciation Alocasia (ă-lõ-KA-see-a) macrorrhiza (măk-rõ-REE-za)  
Botanic Name Alocasia macrorrhiza 
Common Name Giant Elephant's Ear, Cunjevoi, Giant Taro 
Family Araceae 
Cutivars 'Variegata' 
Growth Type Perennial 
Climate Warm to sub-tropical 
Region of Origin Asia 
Aspect Full sun to shade, protected position, drought and frost tender 
Plant Overview

This rhizomatous perennial has a stout dark green trunk with long stalked large arrow-shaped glossy green leaves. Throughout the year yellow-green spathes are produced followed by red fruit. It is frost sensitive requiring protection in cool climates.

Alocasia macrorrhiza is commonly found in tropical climates growing in moist to wet soil types. Cultivated for its edible rhizomes and shoots. Once established it has a high water requirement (Scale: 3-drops from 3), responding to an occasional deep watering during dry periods, particularly for young plants.


This plant is regarded as a weed in many regions including (Shellharbour) and is discouraged from use in gardens.

A weed by definition is a plant that is growing in the wrong place it doesn't mean that it is a weed everywhere and a view of what is a weed may come down to one persons belief.

Some weeds cause a great deal of damage to surrounding vegetation and others just fill available pockets of soil in a garden bed, so asses this plant from what we know and what you think if it really is a weed in your situation.

Alocasia (ă-lõ-KA-see-a) macrorrhiza (măk-rõ-REE-za)



This plant has leaves that are blotched and mottled in white. It normally is smaller than the species and is used as a contrast foliage plant.


The Aroids normally occur in the tropics and is easily identified by the leafy spadix.


These plants occur in the tropics, sub-tropics and the temperate areas of the world. They are represented as terrestrial, epiphytic, aquatic and marsh environments.

Diagnostic Features

These plants are herbs, climbing shrubs and floating aquatics. The sap may be latex and the stem may be aerial, tuberous or rhizomatous in varying size.

The roots may be either feeding type or clinging type often aerial.

The leaves normally have a hastate base with a palmate to pinnate shape and sometimes forming holes.

The protogynous flowers are hermaphrodite or unisexual and monoecious; these are massed together on a cylindrical spadix that is enclosed with a leafy spathe. There may be 6 perianth segments, which are difficult to see with 6 stamens, which unite, into units called synandria.

The ovary is superior with 1 to many chambers that contain 1 to many ovules.

The fruit is normally a berry and the seed may not contain an endosperm.


The South American Aroids are colour, spectacular and commonly used as indoor plants. The Australian species are less dramatic and have been used for food.

This plant tolerates between USDA zones 9a to 11a and grows to 5m (15ft)

Fahrenheit         20º to 45ºF

These temperatures represent the lowest average.

Celsius                 -6.6º to 7.2ºC


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