North America Native Plant

Woodbury’s Stopper

Botanical name: Eugenia woodburyana

USDA symbol: EUWO2

Life cycle: perennial

Habit: shrub

Native status: Native to Puerto Rico  

Woodbury’s Stopper: A Critically Endangered Puerto Rican Treasure You Shouldn’t Plant If you’ve stumbled across Woodbury’s stopper (Eugenia woodburyana) in your native plant research, you’ve discovered one of Puerto Rico’s botanical crown jewels – and one of its most endangered plants. But before you start hunting for seeds or seedlings, ...

Rare plant alert!

Region: United States

Status: S1: Status is uncertain but is somewhere between the following rankings: Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Region: United States

Woodbury’s Stopper: A Critically Endangered Puerto Rican Treasure You Shouldn’t Plant

If you’ve stumbled across Woodbury’s stopper (Eugenia woodburyana) in your native plant research, you’ve discovered one of Puerto Rico’s botanical crown jewels – and one of its most endangered plants. But before you start hunting for seeds or seedlings, there’s something crucial you need to know about this remarkable shrub.

What Makes Woodbury’s Stopper Special

Woodbury’s stopper is a perennial shrub that’s entirely native to Puerto Rico, making it what botanists call an endemic species. This means it exists nowhere else on Earth naturally. As a member of the diverse Eugenia genus, it shares family ties with other stoppers and belongs to the myrtle family, but it has evolved its own unique characteristics over thousands of years in Puerto Rico’s specific climate and conditions.

Like other shrubs, Woodbury’s stopper typically grows as a multi-stemmed woody plant, usually staying under 13-16 feet tall, though it can occasionally grow taller or even single-stemmed depending on environmental factors.

A Plant in Crisis

Here’s where things get serious: Woodbury’s stopper has a Global Conservation Status of S1, which means it’s critically imperiled. In plain English, this plant is hanging on by a thread. Scientists estimate there are typically 5 or fewer known locations where it still grows wild, with fewer than 1,000 individual plants remaining in existence. It’s officially listed as Endangered, and every single plant matters for the species’ survival.

Geographic Distribution

Woodbury’s stopper grows exclusively in Puerto Rico, where it has adapted to very specific local conditions over millennia. Its extremely limited range makes it particularly vulnerable to habitat loss, climate change, and other environmental pressures.

Why You Shouldn’t Plant Woodbury’s Stopper

While it might seem like growing this rare plant would help conservation efforts, here’s why individual gardeners should avoid it:

  • Rarity means responsibility: With so few plants left, any specimens should only be handled by trained conservation professionals
  • Unknown growing requirements: Because it’s so rare, detailed information about its specific needs isn’t readily available
  • Sourcing concerns: Any plants offered for sale likely come from wild collection, which could harm remaining populations
  • Legal protections: Endangered species often have legal protections that make collection or cultivation restricted

Better Alternatives for Your Garden

If you’re drawn to native Puerto Rican plants or the Eugenia genus, consider these more sustainable options:

  • Other Eugenia species: Look for more common stoppers that aren’t endangered
  • Native Puerto Rican shrubs: Choose from the many other beautiful native shrubs that aren’t critically imperiled
  • Regional natives: If you’re not in Puerto Rico, focus on plants native to your specific area

How You Can Really Help

Instead of trying to grow Woodbury’s stopper yourself, here are meaningful ways to support its conservation:

  • Donate to botanical gardens or conservation organizations working on Puerto Rican endemic species
  • Support habitat protection efforts in Puerto Rico
  • Choose other native plants for your garden to support overall biodiversity
  • Spread awareness about the importance of protecting endangered plant species

The Bigger Picture

Woodbury’s stopper represents something larger than just one small shrub – it’s a reminder of how precious and fragile our plant diversity really is. Every endemic species lost is a unique piece of our planet’s biological heritage gone forever. While we can’t all grow this particular plant, we can all make choices that support plant conservation and biodiversity in our own gardens and communities.

Sometimes the best way to love a plant is to leave it in the hands of the experts working tirelessly to save it from extinction. In the case of Woodbury’s stopper, that’s exactly what this remarkable little shrub needs most.

Woodbury’s Stopper

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

Eugenia L. - stopper

Species

Eugenia woodburyana Alain - Woodbury's stopper

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