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Alocasia

Alocasia is a genus of tropical and subtropical flowering plants in the arum family (Araceae), known for their large, ornamental leaves.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Alocasia is a genus of tropical and subtropical flowering plants in the arum family (Araceae), known for their large, ornamental leaves. The genus includes around 80 to 90 accepted species, native mainly to tropical and subtropical Asia and eastern Australia. Many species and cultivars are grown as houseplants and landscape ornamentals.

Description

Alocasia species are perennial tropical plants with large, showy leaves. They are commonly cultivated for their foliage rather than for flowers, which are less prominent in indoor growing conditions.

Distribution and habitat

The genus is native to tropical and subtropical Asia and eastern Australia, where it grows in warm, humid environments. Sources describe many species as forest-understory plants adapted to filtered light and plentiful rainfall.

Cultivation and ornamental use

Alocasia is widely grown as an ornamental plant indoors and outdoors in warm climates. Many cultivated forms are hybrids or selected varieties valued for leaf size, shape, texture, and colour.

Alocasia is closely related to Colocasia and is often grouped with other plants called elephant ears. The name is commonly used for several species and cultivars with similar broad-leaved forms.

Key facts

  • Alocasia belongs to the arum family, Araceae.
  • Plants in this genus are grown mainly for their large, decorative foliage.
  • The genus is native to tropical and subtropical regions of Asia and eastern Australia.
  • Alocasia is closely related to Colocasia, another elephant-ear plant group.
  • Some sources note that Alocasia contains toxic compounds and should not be eaten.
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Canadian context

Alocasia is a popular houseplant in Canada, especially as an indoor ornamental because it is tropical and sensitive to cold temperatures.

Frequently asked questions

What is Alocasia?
Alocasia is a genus of tropical and subtropical flowering plants in the family Araceae, known for large ornamental leaves.
Where is Alocasia native to?
It is native mainly to tropical and subtropical Asia and eastern Australia.
Why is Alocasia called elephant ear?
The common name refers to its large, broad leaves, which resemble an elephant’s ear.
Is Alocasia grown indoors?
Yes. Many species and cultivars are widely grown as indoor houseplants for their decorative foliage.
How many species of Alocasia are there?
Sources report roughly 80 to 90 accepted species, depending on the taxonomy used.
Is Alocasia poisonous?
Some horticultural sources say Alocasia contains toxic compounds and should not be eaten.

References

  1. Wikipedia — https://en.wikipedia.org/wiki/Alocasia
    Supports: Genus description, family, native range, and approximate species count.
  2. NC State University Plant Toolbox — https://plants.ces.ncsu.edu/plants/alocasia/
    Supports: Number of species, native range, growth habit, and ornamental/houseplant use.
  3. Missouri Botanical Garden — https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=264582
    Supports: Approximate species count, native range, relation to Colocasia, and ornamental value.
  4. Royal Horticultural Society — https://www.rhs.org.uk/plants/alocasia/growing-guide
    Supports: Common name, relation to taro, tropical habitat, and toxicity.
  5. Plants & Flowers Foundation Holland — https://www.plantsandflowersfoundationholland.org/en/indoor-plantguide/alocasia/
    Supports: Houseplant use, ornamental foliage, and toxicity note.