Alocasia brisbanensis (F.M.Bailey) Domin

Leaf Petiole Characteristics

Alocasia brisbanensis produces very large, spade-shaped veined leaves attached to long, fleshy petioles, which range in color from purplish brown to green and grow 1.1 m (3 ft 7 in) long.

Mature Plant Height

Mature plants reach a total height of 1.5 m (4 ft 11 in) to 1.8 m (5 ft 11 in).

Leaf Size and Shape

Individual leaves are sagittate to ovate-sagittate, measuring roughly 70 cm (28 in) long and 60 cm (24 in) wide.

Leaf Surface and Lobe Features

They are glossy green, hairless, with backside lobes that have acute to rectangular, slightly rounded tips.

Leaf Veinlet Markings

Elongated 'oil dots' are visible along the leaf veinlets.

Growth Cycle Synchronization

New shoots grow at the same time as inflorescences develop, with no rest period between growth cycles.

Stem Characteristics

The stem is prostrate to erect, 13 cm (5.1 in) in diameter, and covered in the brown dried remains of old leaf bases.

Natural Habitat Type

This species grows on the margins of tropical, subtropical, and warm temperate rainforests at low altitudes, where it occurs as an understory herb in moist, shaded or partially shaded areas including creeks and wetlands.

Preferred Soil and Forest Associations

It grows well in pleiotrophic soils along creek lines and moist forest floors, such as Coastal Swamp Oak Forests.

New South Wales Distribution

In New South Wales, it occurs mainly in coastal and disturbed areas, distributed north of the Illawarra district and extending inland to Dorrigo and the upper Clarence River.

Altitude Range

It grows at altitudes from near sea level up to 1,000 m (3,300 ft).

Cultivation Uses

It is cultivated as both a houseplant and garden plant, valued primarily for its large, exotic-looking leaves and scented flowers.

Indoor Light Requirements

When grown indoors, it thrives in bright sunlight, though afternoon sun can bleach its foliage.

Outdoor Light Requirements

In outdoor gardens, it grows best in partial shade.

Climate and Humidity Needs

As a tropical species, it can be sensitive to cold and dry conditions, and requires high humidity to grow well.

Winter Dormancy

It enters a dormancy period during winter.

Fertilization Recommendation

It benefits from fertilization during the active growing season.

Common Pests

Common pests that affect this plant include mealybugs, spider mites, and aphids.