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Image of Englerarum (Englerarum montanum)

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Dwarf Upright Elephant Ear

Englerarum montanum

Etymology: Named after botanist Adolf Engler; 'montanum' refers to its mountainous native habitat
Also known as: Englerarum, Dwarf Taro
Native to Laos, Thailand, Kachin Hills of Myanmar, and southwestern Yunnan in south-central China

Englerarum montanum is a striking perennial from the Araceae family, growing up to 4 ft (1 m) tall. It features large, upright arrow-shaped or heart-shaped bright green leaves with prominent veins, resembling smaller elephant ears compared to relatives Alocasia odora and Colocasia esculenta. This fast-growing plant serves as both a striking ornamental for tropical/subtropical gardens and an air-purifying indoor specimen. Native to Southeast Asia, it thrives in warm, humid conditions with weekly new leaf growth in summer. While primarily decorative, its roots were historically used in native recipes despite containing toxic calcium oxalate crystals. As the sole species in its genus, it's notable for hybridizing with Alocasia odora to create Alocasia 'Calidora' (Persian palm).

Leaf Characteristics

Arrow-shaped or heart-shaped bright green leaves with prominent veins

Plant Care Overview

Difficultymoderate
LightBright filtered sunlight
WaterWhen top 2-3 inches of soil are dry
Humidityhigh

Care Guide

Essential requirements for your Englerarum

Light & Location

Light Requirements

Bright filtered sunlight

Light conditions can affect leaf color and growth rate. Adjust placement as needed based on your plant's response.

Water & Humidity

Watering Schedule

When top 2-3 inches of soil are dry

Humidity Needs

high humidity

Always check soil moisture before watering. Adjust frequency based on your home's conditions.

Temperature & Environment

Temperature Range

Prefers USDA zone 9b or warmer (64.4-77°F/18-25°C)

Native Climate

Native to Laos, Thailand, Kachin Hills of Myanmar, and southwestern Yunnan in south-central China

Keep away from drafts, heaters, and air conditioners which can stress your plant.

Soil & Nutrition

Soil Type

Aroid mix with coco coir, worm castings, orchid bark, perlite, charcoal, vermiculite; pH 5.5-6.5

Fertilizer

Balanced houseplant fertilizer during growing season

Consider repotting every 1-2 years to refresh soil nutrients and accommodate growth.

Propagation

Methods to grow more Englerarum plants

Rhizome division

Plant Info

Characteristics and background information

Plant Characteristics
Native Region

Laos, Thailand, Kachin Hills of Myanmar, and southwestern Yunnan in south-central China

Growth Rate

fast

Mature Size

4 ft (1 m)

Lifecycle

perennial

Pet Safety

Toxic to pets

Air Purification

This plant has air purifying properties.

Fun Fact

It is the only species in the Englerarum genus and serves as a parent plant for the hybrid Alocasia 'Calidora' (Persian palm) when crossed with Alocasia odora. Roots were historically used in native recipes despite being primarily a decorative plant.

Troubleshooting

Solutions for typical issues with your Englerarum

Droopy Leaves
Symptoms

Leaves appear limp or wilted

Brown Leaf Edges
Symptoms

Leaf edges turn brown and crispy

Varieties

Different varieties of Englerarum

Alocasia 'Calidora' (Persian palm)
Larger stature and ornamental appeal compared to parent species, though incorrectly named as Alocasia × calidora

Hybrid cross between Englerarum montanum (syn. Alocasia gageana) and Alocasia odora

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