North America Native Plant

Puerto Rico Lidflower

Botanical name: Calyptranthes portoricensis

USDA symbol: CAPO9

Life cycle: perennial

Habit: shrub

Native status: Native to Puerto Rico  

Puerto Rico Lidflower: A Rare Caribbean Treasure Worth Protecting Meet the Puerto Rico lidflower (Calyptranthes portoricensis), a little-known shrub that’s fighting for survival in the tropical wetlands of Puerto Rico. This perennial beauty might not be the easiest plant to grow, but for conservation-minded gardeners, it represents something truly special ...

Rare plant alert!

Region: Conservation status by state

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) ⚘

Puerto Rico Lidflower: A Rare Caribbean Treasure Worth Protecting

Meet the Puerto Rico lidflower (Calyptranthes portoricensis), a little-known shrub that’s fighting for survival in the tropical wetlands of Puerto Rico. This perennial beauty might not be the easiest plant to grow, but for conservation-minded gardeners, it represents something truly special – a chance to help preserve one of the Caribbean’s most endangered native species.

What Makes Puerto Rico Lidflower Special?

The Puerto Rico lidflower is a multi-stemmed woody shrub that typically grows less than 13 to 16 feet tall, though it can vary depending on environmental conditions. As a member of the Myrtaceae family, it produces small, fragrant white flowers and sports the glossy green leaves characteristic of this plant family. But here’s what makes it truly remarkable: this plant is found nowhere else on Earth except Puerto Rico.

A Plant in Crisis

Important Conservation Alert: Before we dive into growing tips, you need to know that the Puerto Rico lidflower has a Global Conservation Status of S1, meaning it’s critically imperiled. With typically 5 or fewer known occurrences and fewer than 1,000 individual plants remaining in the wild, this species is hanging on by a thread. If you’re interested in growing this plant, please ensure you source it only from reputable conservation nurseries or botanical institutions working with legally obtained, responsibly propagated material.

Where Does It Call Home?

This rare shrub is endemic to Puerto Rico, where it naturally occurs in wet forests and along stream banks. As an obligate wetland species in the Caribbean region, it almost always grows in consistently moist to saturated soils.

Should You Grow Puerto Rico Lidflower?

Here’s the honest truth: this isn’t a plant for casual gardeners. But if you’re passionate about conservation and have the right conditions, growing Puerto Rico lidflower can be incredibly rewarding. Here’s what to consider:

The Pros:

  • You’ll be directly contributing to species conservation
  • Unique addition to specialized botanical collections
  • Educational value for teaching about endangered species
  • Fragrant flowers that may attract small pollinators
  • Perfect for wetland restoration projects

The Challenges:

  • Extremely difficult to find (and expensive when available)
  • Requires very specific wetland conditions
  • Limited to tropical climates (USDA zones 10-11)
  • May struggle outside its native habitat
  • Slow establishment and growth

Growing Conditions and Care

If you’re up for the challenge, here’s what Puerto Rico lidflower needs to thrive:

Climate Requirements:

  • Hardiness: USDA zones 10-11 only
  • Humidity: High humidity levels essential
  • Temperature: Consistent tropical warmth

Growing Environment:

  • Light: Shade to partial shade (mimics forest understory)
  • Soil: Consistently moist to wet, well-draining but never dry
  • Water: Requires constant moisture – think bog-like conditions
  • Space: Allow room for multi-stemmed growth pattern

Best Garden Settings

Puerto Rico lidflower works best in:

  • Specialized conservation gardens
  • Botanical institution collections
  • Wetland restoration areas
  • Educational demonstration gardens
  • Tropical shade gardens with water features

The Bottom Line

Puerto Rico lidflower isn’t your typical garden center find, and that’s exactly the point. This critically endangered shrub represents a unique opportunity for dedicated gardeners to participate in real conservation work. While it demands specific conditions and careful sourcing, successfully growing this rare beauty means you’re helping ensure future generations can experience this unique piece of Puerto Rican biodiversity.

If you can’t provide the specialized conditions this plant needs, consider supporting Puerto Rican conservation organizations or botanical gardens working to protect this and other endangered species. Sometimes the best way to help a rare plant is to support its protection in its native habitat.

Remember: with great rarity comes great responsibility. If you choose to grow Puerto Rico lidflower, you’re not just adding a plant to your garden – you’re becoming a conservation partner in one of nature’s most important rescue missions.

Puerto Rico 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 portoricensis Britton - Puerto Rico lidflower

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