North America Native Plant

Turtlefat

Botanical name: Auerodendron pauciflorum

USDA symbol: AUPA2

Life cycle: perennial

Habit: shrub

Native status: Native to Puerto Rico  

Turtlefat: A Critically Endangered Puerto Rican Native Worth Protecting Meet turtlefat (Auerodendron pauciflorum), a plant with a quirky name and a serious conservation story. This rare Puerto Rican native shrub is one of those special plants that makes you pause and think about the incredible diversity we’re at risk of ...

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

Turtlefat: A Critically Endangered Puerto Rican Native Worth Protecting

Meet turtlefat (Auerodendron pauciflorum), a plant with a quirky name and a serious conservation story. This rare Puerto Rican native shrub is one of those special plants that makes you pause and think about the incredible diversity we’re at risk of losing. While most gardeners won’t encounter this species in their local nursery, understanding its story helps us appreciate the importance of native plant conservation.

What Makes Turtlefat Special?

Turtlefat is a perennial shrub that typically grows as a multi-stemmed woody plant, usually staying under 13-16 feet tall. Like many members of the coffee family (Rubiaceae), it has simple leaves and a compact growth habit that makes it an attractive specimen when properly established.

This plant is endemic to Puerto Rico, meaning it exists nowhere else in the world naturally. Unfortunately, that exclusivity comes with a heavy price – turtlefat carries a Global Conservation Status of S1, marking it as Critically Imperiled. In the United States, it’s classified as Endangered, with typically five or fewer occurrences and very few remaining individuals in the wild.

Where Does Turtlefat Grow?

You’ll find turtlefat exclusively in Puerto Rico, where it clings to existence in its remaining natural habitats. The plant has adapted to tropical conditions and requires the specific climate and growing conditions found in its native Caribbean environment.

Should You Plant Turtlefat?

Here’s where things get serious – and important. If you’re lucky enough to live in USDA hardiness zones 10-11 and have access to responsibly sourced turtlefat plants, growing this species can be an act of conservation. However, there are crucial considerations:

  • Only obtain plants from reputable conservation organizations or botanical institutions
  • Never collect from wild populations
  • Ensure any plants you acquire are part of legitimate conservation efforts
  • Consider this a specialized conservation project rather than typical gardening

Growing Conditions and Care

Turtlefat thrives in tropical conditions similar to its native Puerto Rican habitat. While specific growing requirements aren’t widely documented due to the plant’s rarity, successful cultivation likely requires:

  • Warm temperatures year-round (zones 10-11)
  • Well-draining soil
  • Protection from harsh winds
  • Consistent moisture without waterlogging
  • Partial shade to filtered sunlight

Given its endangered status, anyone attempting to grow turtlefat should work closely with conservation professionals who can provide specific guidance based on current research and propagation protocols.

Conservation in Your Garden

Even if you can’t grow turtlefat itself, you can support conservation by:

  • Choosing other native Puerto Rican plants if you live in suitable zones
  • Supporting botanical gardens and conservation organizations working to protect rare species
  • Creating habitat for native pollinators and wildlife in your own region
  • Spreading awareness about the importance of plant conservation

The Bigger Picture

Turtlefat represents thousands of plant species worldwide that exist on the brink of extinction. While most of us won’t be growing this particular shrub, its story reminds us why choosing native plants for our gardens matters. Every native plant we choose over a non-native alternative helps support the complex web of life that rare species like turtlefat depend on.

Whether you’re gardening in Puerto Rico’s tropical climate or anywhere else, consider turtlefat’s story as inspiration to research and plant the native species in your own region. After all, today’s common native plants could be tomorrow’s rare treasures if we don’t act as their stewards now.

Turtlefat

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

Rhamnales

Family

Rhamnaceae Juss. - Buckthorn family

Genus

Auerodendron Urb. - auerodendron

Species

Auerodendron pauciflorum Alain - turtlefat

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