North America Non-native Plant

Round-leaf Mallee

Botanical name: Eucalyptus orbifolia

USDA symbol: EUOR4

Native status: Not native but doesn't reproduce and persist in the wild

Round-Leaf Mallee: A Lesser-Known Australian Beauty If you’re on the hunt for something a bit different to add to your garden, you might have stumbled across the round-leaf mallee (Eucalyptus orbifolia). This Australian native is one of those plants that doesn’t get much spotlight, but that doesn’t mean it’s not ...

Round-Leaf Mallee: A Lesser-Known Australian Beauty

If you’re on the hunt for something a bit different to add to your garden, you might have stumbled across the round-leaf mallee (Eucalyptus orbifolia). This Australian native is one of those plants that doesn’t get much spotlight, but that doesn’t mean it’s not worth considering for the right gardener.

What Exactly Is Round-Leaf Mallee?

Round-leaf mallee belongs to the vast Eucalyptus family, which boasts over 700 species of trees and shrubs native to Australia. As the name suggests, this particular species is characterized by its rounded leaves, setting it apart from many of its pointy-leafed cousins. The term mallee refers to a growth habit where multiple stems emerge from an underground root system called a lignotuber – think of it as nature’s way of creating a backup plan for surviving harsh conditions.

Where Does It Come From?

Like most eucalyptus species, round-leaf mallee hails from Australia. However, specific information about its exact native range within Australia is limited in readily available sources. This lack of detailed distribution data is actually quite common with some of the lesser-studied eucalyptus species.

The Challenge of Growing a Mystery Plant

Here’s where things get a bit tricky – and honestly, a bit exciting if you’re the adventurous type. Eucalyptus orbifolia falls into that category of plants where detailed growing information is surprisingly scarce. This could mean a few things:

  • It might be a rare or uncommon species
  • It could be primarily of botanical interest rather than horticultural popularity
  • The species might have limited cultivation outside its native range

What This Means for Your Garden

If you’re considering round-leaf mallee for your landscape, you’ll be venturing into somewhat uncharted territory. While this can be exciting for plant enthusiasts who love a challenge, it also means you’ll need to be prepared for some trial and error.

Without specific growing requirements readily available, you’d likely need to rely on general eucalyptus care guidelines and perhaps connect with specialized native plant societies or botanical institutions for more targeted advice.

Should You Plant It?

The honest answer depends on your gardening philosophy and location. If you’re in Australia and have access to responsibly sourced plants, it could be an interesting addition to a native plant collection. However, the lack of available information makes it challenging to recommend confidently.

For most gardeners, especially those outside Australia, you might want to consider better-documented eucalyptus species that offer similar aesthetic appeal but with more reliable growing information.

Alternative Options

If you’re drawn to the idea of mallee-form eucalyptus with interesting foliage, consider these better-documented alternatives:

  • Eucalyptus kruseana (Kruse’s mallee) – known for its distinctive silver-blue leaves
  • Eucalyptus torquata (Coral gum) – features attractive coral-colored flowers
  • Eucalyptus macrocarpa (Mottlecah) – offers large, showy silver leaves and bright red flowers

The Bottom Line

Round-leaf mallee represents one of those intriguing plants that remind us how much we still don’t know about the plant kingdom. While its limited documentation makes it challenging to grow with confidence, it also highlights the importance of plant conservation and research.

If you do decide to pursue this species, make sure any plants you acquire are from ethical, conservation-minded sources, and be prepared to become something of a pioneer in documenting its garden performance. Sometimes the most rewarding plants are the ones that keep us guessing!

Round-leaf Mallee

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Myrtales

Family

Myrtaceae Juss. - Myrtle family

Genus

Eucalyptus L'Hér. - gum

Species

Eucalyptus orbifolia F. Muell. - round-leaf mallee

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA