North America Native Plant

Psychotria Hombroniana Var. Squarrosa

Botanical name: Psychotria hombroniana var. squarrosa

USDA symbol: PSHOS

Life cycle: perennial

Habit: shrub

Native status: Native to Pacific Basin excluding Hawaii  

Psychotria hombroniana var. squarrosa: A Rare Pacific Island Native If you’re a plant enthusiast with a passion for rare and unusual species, you might have stumbled upon the intriguing name Psychotria hombroniana var. squarrosa. This lesser-known variety belongs to the coffee family and represents one of nature’s more elusive botanical ...

Psychotria hombroniana var. squarrosa: A Rare Pacific Island Native

If you’re a plant enthusiast with a passion for rare and unusual species, you might have stumbled upon the intriguing name Psychotria hombroniana var. squarrosa. This lesser-known variety belongs to the coffee family and represents one of nature’s more elusive botanical treasures from the Pacific islands.

What Makes This Plant Special?

Psychotria hombroniana var. squarrosa is a perennial shrub that typically grows as a multi-stemmed woody plant, usually staying under 13-16 feet in height. Like many members of the Psychotria genus, this variety likely produces small flowers and may have attractive foliage, though specific details about its appearance remain somewhat mysterious in botanical literature.

Where Does It Come From?

This native plant calls the Pacific Basin home, specifically found in Guam and Palau. These tropical island locations suggest the plant has evolved to thrive in warm, humid conditions typical of Pacific island environments.

Should You Grow It?

Here’s where things get a bit tricky. While this plant has an undeniably exotic appeal for collectors, there are several important considerations:

  • Limited availability makes it extremely difficult to source
  • Specific growing requirements are not well-documented
  • Its rarity status and conservation needs are unclear
  • Adaptability to different climates outside its native range is unknown

Growing Considerations

If you’re fortunate enough to encounter this plant, it would likely prefer conditions similar to its native Pacific island habitat:

  • Warm, tropical temperatures year-round
  • High humidity levels
  • Protection from strong winds
  • Well-draining but moisture-retentive soil

However, without specific cultivation information, growing this variety would require careful observation and experimentation.

A Word of Caution

Given the extremely limited information available about this particular variety and its potential rarity, we’d recommend focusing on better-documented native plants for your garden. If you’re interested in Pacific island flora, consider researching other members of the Psychotria genus or consulting with botanical gardens that specialize in tropical Pacific species.

The Bottom Line

Psychotria hombroniana var. squarrosa remains one of botany’s more enigmatic varieties. While its rarity might appeal to serious collectors, the lack of cultivation information and uncertain availability make it more of a botanical curiosity than a practical garden choice. For most gardeners, exploring well-documented native alternatives would be a more rewarding path forward.

If you’re passionate about rare plants, consider supporting botanical conservation efforts in Guam and Palau, where this fascinating variety continues to grow in its natural habitat.

Psychotria Hombroniana Var. Squarrosa

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

Psychotria L. - wild coffee

Species

Psychotria hombroniana (Baill.) Fosberg - wild coffee

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