North America Native Plant

Maricao Lidflower

Botanical name: Calyptranthes peduncularis

USDA symbol: CAPE17

Life cycle: perennial

Habit: shrub

Native status: Native to Puerto Rico  

Synonyms: Calyptranthes dumetorum Alain (CADU5)   

Maricao Lidflower: A Critically Rare Puerto Rican Native Worth Protecting Meet the Maricao lidflower (Calyptranthes peduncularis), one of Puerto Rico’s most precious botanical treasures. This native shrub isn’t just another pretty face in the garden world – it’s a critically imperiled species that desperately needs our help to survive. What ...

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) ⚘

Maricao Lidflower: A Critically Rare Puerto Rican Native Worth Protecting

Meet the Maricao lidflower (Calyptranthes peduncularis), one of Puerto Rico’s most precious botanical treasures. This native shrub isn’t just another pretty face in the garden world – it’s a critically imperiled species that desperately needs our help to survive.

What Makes This Plant Special?

The Maricao lidflower is a perennial shrub that typically grows as a multi-stemmed woody plant, usually reaching less than 13-16 feet in height. Like other members of the myrtle family, it produces clusters of small white flowers that create a delicate, understated beauty in the landscape. Its glossy green leaves provide year-round interest, making it an attractive addition to any native plant collection.

Where Does It Call Home?

This rare gem is endemic to Puerto Rico, meaning you won’t find it growing naturally anywhere else in the world. It’s specifically found in the mountainous regions of the island, where it has adapted to local growing conditions over thousands of years.

The Reality Check: This Plant Needs Our Help

Important Conservation Alert: The Maricao lidflower has a Global Conservation Status of S1, which means it’s critically imperiled. With typically 5 or fewer known occurrences and fewer than 1,000 individuals remaining in the wild, this species is teetering on the edge of extinction.

If you’re considering adding this plant to your garden, here’s what you need to know: only source it from reputable native plant nurseries or conservation programs that use responsibly collected material. Never collect from wild populations – every single plant in nature is precious for the species’ survival.

Growing Conditions and Care

The Maricao lidflower is best suited for USDA hardiness zones 10-11, making it perfect for tropical and subtropical gardens. Based on its natural habitat, it likely prefers:

  • Well-draining soils that don’t stay waterlogged
  • Partial shade to full sun exposure
  • Protection from harsh winds
  • Consistent moisture without overwatering

Perfect for Conservation Gardens

This shrub is ideal for:

  • Native plant gardens focused on Puerto Rican species
  • Conservation landscapes that support endangered plants
  • Botanical collections and educational gardens
  • Pollinator gardens supporting native insects

The small white flowers likely attract native bees and other pollinators, making it a valuable addition to wildlife-friendly landscapes.

The Bottom Line: Grow It Responsibly

Should you plant the Maricao lidflower? If you can source it responsibly and you’re committed to conservation gardening, absolutely! By growing this critically rare species in your garden, you’re participating in an important conservation effort. Just remember that every plant counts when a species is this rare.

Your garden could become a living ark for one of Puerto Rico’s most endangered plants. That’s not just gardening – that’s making a real difference in preserving our planet’s botanical heritage for future generations.

Contact local botanical gardens, native plant societies, or conservation organizations in Puerto Rico to learn about responsible sourcing options. Together, we can help ensure that the Maricao lidflower continues to grace our world for years to come.

Maricao 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 peduncularis Alain - Maricao lidflower

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