North America Native Plant

Showy Cappel

Botanical name: Palicourea guianensis barbinervia

USDA symbol: PAGUB

Life cycle: perennial

Habit: shrub

Native status: Native to Puerto Rico  

Synonyms: Palicourea barbinervia DC. (PABA9)   

Showy Cappel: A Lesser-Known Puerto Rican Native Shrub If you’re passionate about native gardening and happen to live in Puerto Rico, you might want to learn about the showy cappel (Palicourea guianensis barbinervia). This perennial shrub is one of those plants that doesn’t get much spotlight in gardening circles, but ...

Showy Cappel: A Lesser-Known Puerto Rican Native Shrub

If you’re passionate about native gardening and happen to live in Puerto Rico, you might want to learn about the showy cappel (Palicourea guianensis barbinervia). This perennial shrub is one of those plants that doesn’t get much spotlight in gardening circles, but it represents the unique flora that makes Puerto Rican landscapes so special.

What Is Showy Cappel?

Showy cappel is a native Puerto Rican shrub that belongs to the coffee family (Rubiaceae). As a true perennial, this woody plant will stick around for years once established, typically growing as a multi-stemmed shrub that usually stays under 13-16 feet tall. You might also see it referenced by its botanical synonym, Palicourea barbinervia DC., in older gardening references.

Where Does It Grow?

This plant is a Puerto Rico exclusive – it’s native to and naturally occurs only in Puerto Rico. For gardeners on the island, this makes showy cappel a fantastic choice for creating authentic, locally-adapted landscapes that celebrate the region’s natural heritage.

Should You Plant Showy Cappel?

Here’s where things get a bit tricky – and honestly refreshing in our age of information overload. Showy cappel is one of those plants that hasn’t been extensively studied or commercialized, which means there’s limited information available about its specific growing requirements, appearance, or garden performance.

For Puerto Rican gardeners, this could be either an exciting opportunity or a cautious venture:

  • The upside: You’d be growing a true local native that’s perfectly adapted to Puerto Rico’s climate and ecosystems
  • The challenge: Limited cultivation information means you’d be somewhat pioneering its use in home gardens
  • The responsibility: As a native plant, it likely supports local wildlife in ways we haven’t fully documented yet

Growing Conditions and Care

While specific growing requirements for showy cappel aren’t well-documented, we can make some educated guesses based on its native status and shrub growth habit. As a Puerto Rican native, it’s likely adapted to:

  • Tropical to subtropical conditions
  • The natural rainfall patterns of Puerto Rico
  • Local soil types and pH levels
  • The island’s humidity and temperature ranges

Since it’s described as a shrub, you can expect it to develop multiple stems from the base and maintain a woody structure year-round. The exact mature size, growth rate, and seasonal changes remain mysteries that make this plant particularly intriguing for adventurous gardeners.

The Bottom Line

Showy cappel represents something special in the gardening world – a native plant that hasn’t been commercialized or extensively studied, yet continues to thrive in its natural Puerto Rican habitat. If you’re a Puerto Rican gardener interested in native plants and don’t mind a bit of gardening detective work, this could be a rewarding addition to your landscape.

Just remember that working with lesser-known natives requires patience and observation. You’ll essentially be contributing to our understanding of how this plant performs in cultivation – pretty cool when you think about it!

Before planting, try to source your showy cappel responsibly from reputable native plant nurseries or propagation programs to ensure you’re not impacting wild populations. After all, the best way to celebrate Puerto Rico’s unique flora is to protect it while we learn to grow it.

Showy Cappel

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

Palicourea Aubl. - cappel

Species

Palicourea guianensis Aubl. - showy cappel

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