North America Native Plant

Yellow-ball Flower

Botanical name: Mallotus tiliifolius

USDA symbol: MATI4

Life cycle: perennial

Habit: shrub

Native status: Native to Pacific Basin excluding Hawaii  

Synonyms: Mallotus palauensis Hosok. (MAPA6)   

Yellow-Ball Flower: A Charming Native Shrub for Tropical Gardens If you’re gardening in the tropical Pacific and looking for a delightfully understated native shrub, meet the yellow-ball flower (Mallotus tiliifolius). This modest beauty might not be the showiest plant in your garden, but it brings authentic island charm and ecological ...

Yellow-Ball Flower: A Charming Native Shrub for Tropical Gardens

If you’re gardening in the tropical Pacific and looking for a delightfully understated native shrub, meet the yellow-ball flower (Mallotus tiliifolius). This modest beauty might not be the showiest plant in your garden, but it brings authentic island charm and ecological value that’s hard to beat.

What Makes Yellow-Ball Flower Special

The yellow-ball flower is a perennial shrub that typically grows as a multi-stemmed woody plant, usually staying under 13-16 feet tall. True to its name, this native produces small yellowish flowers arranged in distinctive ball-like clusters that give the plant its charming common name. The rounded leaves create a pleasant backdrop for these unique blooms, making it an interesting addition to any tropical landscape.

Where Yellow-Ball Flower Calls Home

This Pacific native has a rather exclusive address – you’ll find it naturally growing in Guam and Palau, where it’s perfectly adapted to the warm, humid island conditions. As a true native of the Pacific Basin (excluding Hawaii), it plays an important role in the natural ecosystems of these tropical islands.

Growing Yellow-Ball Flower Successfully

If you’re lucky enough to garden in USDA hardiness zones 10-12, yellow-ball flower can be a wonderful addition to your landscape. Here’s what you need to know to keep this tropical native happy:

  • Climate needs: Thrives in warm, humid tropical conditions year-round
  • Light requirements: Adaptable to partial shade through full sun
  • Soil preferences: Well-draining soil is essential to prevent root problems
  • Water needs: Moderate watering – avoid both drought stress and waterlogged conditions
  • Space planning: Allow room for its natural shrub form to develop

Garden Design Ideas

Yellow-ball flower works beautifully in several landscape applications. Consider using it as an understory shrub beneath taller native trees, or plant several together for a naturalistic screening effect. It’s particularly well-suited for native plant gardens and tropical landscapes where you want to showcase authentic island flora rather than exotic imports.

Supporting Local Wildlife

While specific wildlife benefits aren’t well-documented, native shrubs like yellow-ball flower typically support local ecosystems by providing habitat and food sources for indigenous insects and birds. The small clustered flowers likely attract various small pollinators, contributing to the overall health of your garden’s ecosystem.

Is Yellow-Ball Flower Right for Your Garden?

This native shrub is an excellent choice if you’re gardening in Guam, Palau, or similar tropical Pacific climates and want to incorporate authentic native plants into your landscape. However, if you’re gardening outside these tropical zones, you’ll need to look for native alternatives better suited to your local climate.

Yellow-ball flower offers gardeners the satisfaction of growing a true Pacific native while adding subtle beauty and ecological value to tropical landscapes. While it may not be the most dramatic plant in your garden, its authentic island heritage and understated charm make it a worthy addition to any native plant collection in appropriate climates.

Yellow-ball Flower

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

Euphorbiales

Family

Euphorbiaceae Juss. - Spurge family

Genus

Mallotus Lour. - mallotus

Species

Mallotus tiliifolius (Blume) Müll. Arg. - yellow-ball flower

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