Heptapleurum (Schefflera) actinophyllum 'Amate'

Cultivar history and natural origin

Heptapleurum actinophyllum is native from southern New Guinea to northern Australia. In wet tropical forest it develops as a scrambling tree, and mature plants produce conspicuous red flower structures followed by fruits dispersed by birds.

The species was long known as Schefflera actinophylla. It returned to the genus Heptapleurum in 2020, while Schefflera remains its familiar horticultural name. Escaped plants have established wild populations in several warm regions outside the native range and can spread invasively.

‘Amate’ is an established compact foliage selection and later became the parent of ‘Amate Soleil’. Its compact habit is relative to a large tropical tree, and older plants continue to form a substantial woody framework.

Light, moisture and root care

Watering: Heptapleurum ‘Amate’ prefers reliable moisture, but its roots must not remain saturated. Avoid an oversized pot because its centre can stay wet after the surface appears dry. Water when the upper few centimetres have dried while the deeper root ball remains lightly moist, soaking it evenly and emptying all runoff.

Light and temperature: Provide bright filtered light and stable warmth for the large leaflets. Gentle sun is suitable after acclimatisation.

Leaf care: Prune above a node in spring or summer to control height and encourage branching. Remove crowded or weak shoots selectively instead of shearing every tip.

How to deal with plant problems

Yellowing and leaf drop on ‘Amate’ can result from wet roots, drought, cold, low light or relocation. Examine the root ball and newest leaves before changing care. If the centre remains wet and the roots feel soft, improve drainage and wait longer before watering again. Crisp edges combined with a lightweight pot instead call for thorough watering.

Long weak petioles and a sparse crown indicate inadequate light. Move towards stronger filtered light gradually and postpone heavy feeding until the new growth becomes sturdier.

Brown crisp margins suggest drought, dry air or accumulated salts. Flush the mix if residue is visible and stabilise moisture. Soft dark patches appearing after a cold draught indicate chilling, while spreading softness near wet stems raises concern for rot.

Spider mites create stippling or webbing, thrips leave silver scars and dark specks, and scale or mealybugs produce bumps, wax and sticky honeydew. Black sooty growth develops on that residue rather than attacking clean leaves first. Remove the sap feeders and clean away the remaining honeydew.

Heptapleurum (Schefflera) actinophyllum ‘Amate’ 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.

How did the name change from Schefflera actinophylla to Heptapleurum actinophyllum?

Heptapleurum combines Greek hepta, meaning seven, with pleuron, meaning rib or side. The epithet actinophyllum means ray-leaved.

Joseph Gaertner established the genus Heptapleurum in 1791 in De Fructibus et Seminibus Plantarum, volume 2, page 472.

Stephan Friedrich Ladislaus Endlicher first described it as Brassaia actinophylla in 1839 in Novarum Stirpium Decades, volume 1, page 89. Porter Prescott Lowry and Gregory M. Plunkett later placed it in Heptapleurum as Heptapleurum actinophyllum in 2020 in Novon, volume 28, page 146.

Schefflera actinophylla is the familiar former name. Porter P. Lowry II and Gregory M. Plunkett reinstated Heptapleurum for the Asian group formerly included in Schefflera in 2020 in Novon, volume 28. Kew’s World Checklist accepts Heptapleurum actinophyllum.