North America Native Plant

Hippobroma

Botanical name: Hippobroma

USDA symbol: HIPPO3

Life cycle: perennial

Habit: forb

Native status: Non-native, reproduces and persists in the wild in Hawaii âš˜ Non-native, reproduces and persists in the wild in the lower 48 states âš˜ Non-native, reproduces and persists in the wild in Pacific Basin excluding Hawaii âš˜ Native to Puerto Rico âš˜ Native to the U.S. Virgin Islands  

Hippobroma: A Beautiful but Dangerous Plant You Should Avoid When it comes to gardening, not every pretty plant deserves a spot in your landscape. Meet hippobroma (Hippobroma), a deceptively charming perennial that’s as dangerous as it is delicate. While its star-shaped white flowers might catch your eye, this is one ...

Hippobroma: A Beautiful but Dangerous Plant You Should Avoid

When it comes to gardening, not every pretty plant deserves a spot in your landscape. Meet hippobroma (Hippobroma), a deceptively charming perennial that’s as dangerous as it is delicate. While its star-shaped white flowers might catch your eye, this is one plant you’ll want to admire from a distance—if at all.

What Exactly Is Hippobroma?

Hippobroma is a low-growing perennial forb, which means it’s an herbaceous plant without woody stems. Think of it as nature’s version of a wolf in sheep’s clothing—it looks innocent enough with its small, pretty blooms, but it packs a seriously toxic punch. This plant belongs to the bellflower family and has earned itself quite the reputation in the plant world, though not for the reasons you’d want in your garden.

Where Does Hippobroma Come From?

Originally native to Puerto Rico and the U.S. Virgin Islands, hippobroma has made itself at home in several other locations. You can now find it growing in Florida, Hawaii, and even as far as Palau in the Pacific. In most of these places, it’s considered a non-native species that has naturalized and reproduces on its own.

Why You Should Think Twice (Or Better Yet, Don’t Think At All)

Here’s where things get serious: hippobroma is extremely poisonous. We’re talking about a plant that contains toxic alkaloids that can be fatal to humans and animals alike. Even small amounts can cause severe illness, and there’s no antidote. This isn’t just a keep away from kids and pets situation—this is a keep away from everyone and everything kind of plant.

The toxicity affects:

  • Humans (potentially fatal)
  • Livestock and farm animals
  • Pets including dogs and cats
  • Wildlife

What About Its Garden Appeal?

From a purely aesthetic standpoint, hippobroma does have some attractive qualities. It produces small, white, star-shaped flowers and forms a low-growing mat that could theoretically work as ground cover. However, any potential beauty is completely overshadowed by its extreme danger. No garden design is worth risking the safety of your family, pets, or visitors.

Growing Conditions (For Identification Purposes Only)

If you need to identify hippobroma—perhaps to remove it from your property—here’s what to look for. This plant typically thrives in:

  • USDA hardiness zones 9-11
  • Tropical and subtropical climates
  • Moist, well-draining soils
  • Areas with consistent warmth and humidity

Better Alternatives for Your Garden

Instead of risking it with hippobroma, consider these safer, native alternatives that can provide similar aesthetic benefits:

For white flowers and ground cover:

  • Native violets (Viola species)
  • Wild ginger (depending on your region)
  • Native sedums or stonecrops
  • Local wildflower species with white blooms

Your local native plant society or extension office can help you identify beautiful, safe alternatives that are native to your specific area.

The Bottom Line

Sometimes in gardening, the answer is simply no. Hippobroma falls squarely into this category. While it might seem like we’re being overly cautious, when it comes to plants that can cause serious harm or death, there’s no such thing as being too careful. Stick with safe, native plants that will give you beauty without the worry.

If you encounter hippobroma growing wild in your area, consider contacting local authorities or extension services for guidance on safe removal. And remember—there are thousands of wonderful, safe plants out there just waiting to make your garden gorgeous. Choose those instead!

Hippobroma

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

Campanulales

Family

Campanulaceae Juss. - Bellflower family

Genus

Hippobroma G. Don - hippobroma

Species

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