North America Native Plant

Tapeworm-plant

Botanical name: Eubrachion ambiguum

USDA symbol: EUAM3

Life cycle: perennial

Habit: shrub

Native status: Native to Puerto Rico  

Tapeworm-Plant: A Mysterious Puerto Rican Native Worth Investigating Ever stumbled across a plant name that makes you do a double-take? Meet the tapeworm-plant (Eubrachion ambiguum), a Puerto Rican native with one of the most memorable common names in the plant world. While its name might make you squirm a little, ...

Tapeworm-Plant: A Mysterious Puerto Rican Native Worth Investigating

Ever stumbled across a plant name that makes you do a double-take? Meet the tapeworm-plant (Eubrachion ambiguum), a Puerto Rican native with one of the most memorable common names in the plant world. While its name might make you squirm a little, this perennial shrub is actually a fascinating piece of Caribbean flora that deserves a closer look.

What Is Tapeworm-Plant?

Tapeworm-plant is a perennial, multi-stemmed woody shrub native to Puerto Rico. True to its shrub nature, it typically grows with several stems arising from or near the ground, usually staying under 13 to 16 feet in height. Like many tropical shrubs, it can occasionally grow taller or develop a single stem depending on its growing conditions.

Where Does It Grow Naturally?

This intriguing plant calls Puerto Rico home, where it has evolved to thrive in the island’s unique tropical climate. As a Puerto Rican endemic, tapeworm-plant represents the kind of specialized biodiversity that makes Caribbean flora so special.

The Challenge: Limited Information

Here’s where things get interesting (and a bit frustrating for plant lovers): tapeworm-plant is one of those mysterious species that seems to fly under the radar. Despite its memorable name and native status, there’s surprisingly little information available about its specific growing requirements, appearance details, or ecological role.

This lack of documentation could mean several things:

  • It’s an extremely rare species with limited study
  • It may have been reclassified or renamed in recent taxonomic work
  • It could be a very localized endemic with a small natural range

Should You Try Growing Tapeworm-Plant?

The honest answer? It’s complicated. While the idea of growing a unique Puerto Rican native is certainly appealing, the lack of available information makes it challenging to recommend for home gardeners.

If you’re in Puerto Rico or a similar tropical climate: You might have the best shot at success, given that you’d be working within its native range. However, sourcing the plant could be extremely difficult.

If you’re elsewhere: Without knowing its specific hardiness zones, moisture needs, or soil preferences, attempting to grow tapeworm-plant would be quite the gamble.

Alternative Native Options

If you’re drawn to unique Puerto Rican natives but want something with better-documented growing requirements, consider exploring other endemic species from the region. Many Puerto Rican natives are better studied and more readily available through specialty tropical plant nurseries.

The Bottom Line

Tapeworm-plant represents one of those botanical mysteries that remind us how much we still don’t know about plant diversity, especially in tropical regions. While it’s not a practical choice for most gardeners due to the lack of available information, it serves as a fascinating example of the specialized flora found in places like Puerto Rico.

If you ever find yourself in Puerto Rico and happen to encounter this elusive shrub in the wild, consider yourself lucky to witness a piece of the island’s unique botanical heritage. Just remember to observe and appreciate rather than collect, especially given the uncertain status of this mysterious native plant.

Tapeworm-plant

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

Santalales

Family

Eremolepidaceae Tiegh. & Kuijt - Catkin-mistletoe family

Genus

Eubrachion Hook. f. - tapeworm-plant

Species

Eubrachion ambiguum (Hook. & Arn.) Engl. - tapeworm-plant

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