North America Native Plant

Soft Timonius

Botanical name: Timonius mollis var. submollis

USDA symbol: TIMOS

Life cycle: perennial

Habit: tree

Native status: Native to Pacific Basin excluding Hawaii  

Soft Timonius: A Rare Pacific Island Tree Worth Knowing About If you’re passionate about unique native trees and have connections to the Pacific Islands, you might have heard whispers about the soft timonius (Timonius mollis var. submollis). This intriguing tree species represents one of nature’s more elusive botanical treasures, calling ...

Soft Timonius: A Rare Pacific Island Tree Worth Knowing About

If you’re passionate about unique native trees and have connections to the Pacific Islands, you might have heard whispers about the soft timonius (Timonius mollis var. submollis). This intriguing tree species represents one of nature’s more elusive botanical treasures, calling the remote islands of Guam and Palau home.

What Is Soft Timonius?

The soft timonius is a perennial tree that naturally grows as a single-stemmed woody plant, typically reaching heights greater than 13-16 feet. Like many island species, it has adapted to thrive in specific Pacific Basin conditions, making it a true native of this unique corner of the world.

Where Does It Grow Naturally?

This tree species is native to the Pacific Basin, specifically documented in Guam and Palau. Its limited geographic distribution makes it a rare find, even in its natural habitat.

Should You Plant Soft Timonius?

Here’s where things get interesting – and a bit challenging. While the soft timonius sounds like a fascinating addition to any tropical garden, there’s a catch: very little is known about its specific growing requirements, care needs, or even its overall appearance and characteristics.

The Reality of Growing Rare Species

For most home gardeners, the soft timonius presents several challenges:

  • Extremely limited availability of seeds or plants
  • Unknown specific growing conditions and care requirements
  • Unclear USDA hardiness zones (though likely limited to tropical climates)
  • No established propagation methods for home gardeners

What We Don’t Know (Yet)

Unfortunately, many details about this species remain mysteries:

  • Specific soil and water requirements
  • Pollinator relationships and wildlife benefits
  • Growth rate and mature size variations
  • Seasonal care needs
  • Companion planting opportunities

Alternative Native Options

If you’re drawn to the idea of growing Pacific Island natives but can’t access soft timonius, consider researching other documented native trees from your specific region. Many islands have native species with well-established growing guides and available plant material from reputable native plant societies.

The Bottom Line

While the soft timonius is undoubtedly a fascinating piece of Pacific Island biodiversity, it remains more of a botanical curiosity than a practical garden choice for most of us. If you do have access to this rare species through legitimate conservation efforts or native plant programs, approach it as a conservation project rather than a typical garden addition.

Sometimes the most valuable plants are the ones we appreciate from afar while supporting the conservation efforts that help protect them in their natural habitats.

Soft Timonius

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Rubiales

Family

Rubiaceae Juss. - Madder family

Genus

Timonius DC.

Species

Timonius mollis Valeton - soft timonius

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