Alocasia nycteris 'Batwing'

Natural habitat of Alocasia nycteris

‘Batwing’ is a familiar name for Alocasia nycteris, a species native to north-western Panay in the Philippines. It grows close to sea level in lowland forest and regrowing forest, often on rocky ground and in shaded disturbed places. Regular rain keeps the ground moist, and water drains quickly through the rocky soil. At home, give it filtered light and use a loose mix that stays lightly moist.

Caring for Alocasia nycteris ‘Batwing’

• Light: Grow ‘Batwing’ in bright shade or filtered indirect light. Its documented cultivation preference is a shaded position with an adequate water supply.
• Watering: Water thoroughly when the top layer begins to dry. Keep the deeper roots consistently moist during active growth.
• Humidity: Maintain 60–80% humidity. Good humidity helps the broad leaf margins remain in better condition.
• Temperature: Provide stable warmth and protect the plant from cold draughts and abrupt temperature changes.
• Substrate: Use a rich, aerated mixture containing coir-based potting mix, bark and perlite or pumice. Ensure that water can drain quickly after each watering.
• Feeding: Apply a dilute complete fertiliser during active growth. Reduce applications when leaf production slows.
• Space: Give the long petioles and bat-shaped leaves room to develop. A stable position protects the large leaf blades from repeated contact and tearing.
• Pest checks: Examine the large leaf undersides regularly for spider mites and thrips.
• Repotting: Increase the pot size gradually as the roots develop. A broad, stable outer container can help support a larger plant, provided the inner growing pot remains close to the root size.
• Propagation: Propagate through separation of the rhizomes or established basal offsets. Every division should include a viable growth point and enough stored rhizome tissue to resume growth.

Problems and solutions for Alocasia nycteris ‘Batwing’

• Deeply wavy or partly divided leaf edges: Mature Alocasia nycteris naturally develops wavy to partly divided margins. Fresh tears have pale or brown wound edges and usually follow rubbing, handling or a leaf catching as it opens. Give new leaves enough clearance and let a caught blade release by itself. The guide to stuck and torn new leaves explains how to protect emerging growth.
• Large leaves droop even though the substrate is wet: Root stress can block water uptake and mimic thirst. Check for a sour smell, soft roots or a soft stem base before adding more water, then remove confirmed decay and repot the healthy roots and firm base in fresh, airy substrate.
• Pale stippling that progresses to bronzing or webbing: Inspect the leaf undersides for moving mites, eggs or fine webbing. After confirming spider mites, isolate and rinse the plant thoroughly, then repeat a miticide, horticultural oil or insecticidal soap labelled for houseplants. See the spider-mite guide.

Alocasia nycteris ‘Batwing’ is toxic to people and pets

• Keep this plant away from children, cats and dogs.
• Its leaves and stems contain insoluble calcium oxalate crystals, which can irritate the mouth, throat, skin and eyes.
• Chewing may cause burning pain, drooling, swelling, vomiting or difficulty swallowing. Contact a veterinarian or medical professional after exposure, especially if swelling or breathing problems occur.

Alocasia nycteris and the name ‘Batwing’

Alocasia combines the Greek prefix a-, meaning “without” or “lacking”, with Colocasia, the name of a related aroid genus.

The formal botanical citation is Alocasia (Schott) G.Don. George Don established the genus at that rank in 1839 in Hortus Britannicus, edition 3, page 631.

The epithet nycteris alludes to bats and to the bat genus Nycteris, matching the divided leaves’ bat-wing outline.

Maria Melanie Medecilo-Guiang, George C. Yao and Domingo A. Madulid described Alocasia nycteris in 2007 in Journal of the Botanical Research Institute of Texas, volume 1, page 817.

‘Batwing’ is a horticultural synonym or trade label for Alocasia nycteris, not a separate recognized cultivar.