North America Native Plant

Tomophyllum

Botanical name: Tomophyllum

USDA symbol: TOMOP

Life cycle: perennial

Habit: forb

Native status: Pacific Basin excluding Hawaii  

Tomophyllum: A Mysterious Pacific Island Native If you’re the type of gardener who loves a botanical mystery, then tomophyllum (Tomophyllum) might just capture your imagination. This enigmatic plant is one of those rare specimens that keeps botanists and gardeners guessing, with limited information available even in scientific circles. What We ...

Tomophyllum: A Mysterious Pacific Island Native

If you’re the type of gardener who loves a botanical mystery, then tomophyllum (Tomophyllum) might just capture your imagination. This enigmatic plant is one of those rare specimens that keeps botanists and gardeners guessing, with limited information available even in scientific circles.

What We Know About Tomophyllum

Tomophyllum is a perennial forb, which means it’s an herbaceous plant that lacks significant woody tissue and comes back year after year. Think of it as being in the same general category as wildflowers and garden perennials, rather than shrubs or trees. As a forb, it has perennating buds at or below ground level that allow it to survive and regrow each growing season.

Where Does Tomophyllum Come From?

This mysterious plant calls the Pacific Basin home, specifically documented in Palau, that beautiful island nation in the western Pacific Ocean. It’s considered native to the Pacific Basin region, though curiously undefined for Hawaii. This geographic specificity makes it a true Pacific island native, adapted to the unique conditions of oceanic island environments.

Should You Grow Tomophyllum?

Here’s where things get interesting—and challenging. While tomophyllum isn’t listed as invasive or noxious (which is good news!), the reality is that there’s extremely limited information available about this plant. This creates both an opportunity and a challenge for adventurous gardeners.

The Challenge of Growing the Unknown

Unfortunately, specific details about tomophyllum’s growing requirements, aesthetic qualities, and garden performance remain largely unknown. We don’t have reliable information about:

  • Preferred soil conditions
  • Water requirements
  • Sun or shade preferences
  • Expected size and appearance
  • Flowering characteristics
  • Pollinator benefits
  • Wildlife value

What This Means for Gardeners

If you’re considering adding tomophyllum to your garden, you’d be entering largely uncharted territory. This could be exciting for experimental gardeners, but frustrating for those who prefer well-documented plants with proven garden performance.

Given its Pacific island origins, you might reasonably assume it prefers warm, humid conditions similar to other tropical and subtropical plants, but without specific data, this is educated guesswork at best.

Alternative Approaches

If you’re drawn to Pacific island natives or unusual perennial forbs, consider exploring better-documented plants from similar regions. Many other Pacific basin natives offer the exotic appeal you might be seeking, but with the advantage of established cultivation information.

For gardeners specifically interested in supporting Pacific ecosystems, focusing on other well-documented native plants from the region might be a more practical approach while still honoring your interest in Pacific island flora.

The Bottom Line

Tomophyllum represents one of gardening’s intriguing mysteries—a plant that exists in the botanical record but remains largely unknown in cultivation. While there’s nothing preventing you from growing it (assuming you can source it), the lack of cultivation information makes it a challenging choice for most gardeners.

Sometimes the most honest advice is to acknowledge when we simply don’t know enough. In the case of tomophyllum, that’s exactly where we find ourselves—intrigued, but informed enough to know we need more information before making solid recommendations.

Tomophyllum

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Polypodiales

Family

Grammitidaceae Newman - Kihi Fern family

Genus

Tomophyllum (E. Fourn.) Parris - tomophyllum

Species

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