North America Native Plant

Woodbury’s Lidflower

Botanical name: Calyptranthes woodburyi

USDA symbol: CAWO5

Life cycle: perennial

Habit: tree

Native status: Native to Puerto Rico  

Woodbury’s Lidflower: A Critically Endangered Puerto Rican Treasure Meet Woodbury’s lidflower (Calyptranthes woodburyi), one of Puerto Rico’s most endangered native trees. This perennial beauty belongs to the myrtle family and represents a precious piece of Caribbean biodiversity that’s hanging on by a thread. Where You’ll Find This Rare Gem Woodbury’s ...

Rare plant alert!

Region: Conservation status by state

Status: S1?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ 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) ⚘

Woodbury’s Lidflower: A Critically Endangered Puerto Rican Treasure

Meet Woodbury’s lidflower (Calyptranthes woodburyi), one of Puerto Rico’s most endangered native trees. This perennial beauty belongs to the myrtle family and represents a precious piece of Caribbean biodiversity that’s hanging on by a thread.

Where You’ll Find This Rare Gem

Woodbury’s lidflower is exclusively native to Puerto Rico, making it a true island endemic. This means you won’t find it growing naturally anywhere else in the world – not in Florida, not in Hawaii, nowhere but the beautiful island of Puerto Rico.

Why This Tree Needs Our Attention (And Protection)

Here’s where things get serious, fellow plant lovers. Calyptranthes woodburyi carries a Global Conservation Status of S1?, which translates to Critically Imperiled. What does that mean in plain English? This species is in extreme danger of disappearing forever, with typically five or fewer known locations and fewer than 1,000 individual plants remaining in the wild.

What We Know About Its Growth

As a member of the tree family, Woodbury’s lidflower is a perennial woody plant that develops a single trunk and can grow taller than 13-16 feet under ideal conditions. Like many tropical trees, it may occasionally develop multiple stems or stay shorter depending on environmental pressures.

Should You Plant Woodbury’s Lidflower?

This is where we need to pump the brakes a bit. Given its critically imperiled status, this isn’t a tree you should be casually adding to your garden wishlist. Here’s why:

  • Extremely limited wild populations make every individual precious
  • Specific growing requirements are not well-documented
  • Seeds or plants should only come from legitimate conservation programs
  • Unauthorized collection could further threaten wild populations

If You’re Serious About Conservation

If you’re genuinely interested in helping preserve this species, consider supporting or connecting with:

  • Puerto Rican botanical gardens and conservation organizations
  • University research programs focused on endemic plant conservation
  • Legitimate seed banks and conservation nurseries

Any cultivation should only be attempted with properly sourced, ethically obtained material and preferably as part of organized conservation efforts.

Better Alternatives for Your Garden

While we can’t recommend casually growing Woodbury’s lidflower, Puerto Rico has many other native plants that would love a spot in your tropical or subtropical garden. Consider exploring other members of the myrtle family or native Puerto Rican trees that aren’t facing extinction.

The Bottom Line

Woodbury’s lidflower represents the fragile beauty of island ecosystems and reminds us why plant conservation matters. While it’s not suitable for typical home gardening, learning about rare species like this one helps us appreciate the incredible diversity of our plant world – and hopefully inspires us to protect what we still have.

Sometimes the best way to love a plant is to admire it from afar and support the people working hard to keep it from disappearing forever.

Woodbury’s Lidflower

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

Calyptranthes Sw. - mountainbay

Species

Calyptranthes woodburyi Alain - Woodbury's lidflower

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