Non-native Plants

Forked Fanwort

Cabomba furcata

USDA symbol: CAFU13

perennial forb

Puerto Rico: non-native, naturalized

If you’re passionate about water gardening and always on the lookout for unique aquatic plants, you might have stumbled across forked fanwort (Cabomba furcata). This underwater beauty belongs to the fascinating world of aquatic plants, though it’s one that comes with some important considerations for the conscious gardener. Forked fanwort ...

Forked Fanwort: An Aquatic Plant for Water Garden Enthusiasts

If you’re passionate about water gardening and always on the lookout for unique aquatic plants, you might have stumbled across forked fanwort (Cabomba furcata). This underwater beauty belongs to the fascinating world of aquatic plants, though it’s one that comes with some important considerations for the conscious gardener.

What is Forked Fanwort?

Forked fanwort is a perennial aquatic plant that lives its life completely submerged in water. As a forb, it’s an herbaceous plant without woody stems, relying instead on soft, flexible tissue that sways gracefully with water currents. You might also see it listed under its scientific synonym Cabomba piauhyensis in some older references.

Where Does It Come From?

Here’s where things get interesting from a native gardening perspective. Forked fanwort isn’t originally from North American waters. It’s been introduced to Puerto Rico, where it has established itself and now reproduces naturally in the wild. This makes it a non-native species in the Caribbean region.

  • Species observed
  • No observations

A True Water Baby

Forked fanwort is what botanists call an obligate wetland plant, which is a fancy way of saying it absolutely must have its feet wet – or in this case, its entire body submerged. This plant almost always occurs in wetland environments and simply cannot survive in typical garden soil conditions.

Should You Grow Forked Fanwort?

This is where responsible gardening comes into play. While forked fanwort isn’t currently listed as invasive, its status as a non-native species that readily reproduces in the wild should give water gardeners pause. Here are some key considerations:

  • Limited information exists about its specific growing requirements and potential environmental impacts
  • As a non-native species, it may not provide the same ecological benefits as native aquatic plants
  • Its ability to reproduce spontaneously means it could potentially spread beyond your intended growing area

Native Alternatives to Consider

Before settling on forked fanwort, consider exploring native aquatic plants that can provide similar aesthetic appeal while supporting local ecosystems. Native water plants typically offer better wildlife habitat, support local pollinators, and won’t pose risks of uncontrolled spread. Check with your local native plant society or extension office for recommendations specific to your region.

If You Choose to Grow It

Should you decide to include forked fanwort in your water garden, remember that specific growing information for this species is quite limited. Based on its obligate wetland status, it will need:

  • Complete submersion in water
  • Likely prefers still or slow-moving water
  • Unknown temperature and hardiness requirements
  • Contained growing environment to prevent spread

The Bottom Line

While forked fanwort might seem like an intriguing addition to your aquatic garden, the combination of limited growing information and its non-native status makes it a questionable choice for environmentally conscious gardeners. Your water garden will likely thrive better with well-researched native alternatives that support local wildlife while providing the beauty and interest you’re seeking.

Remember, the most rewarding gardens are those that work in harmony with local ecosystems – and that usually means choosing plants that belong in your neck of the woods!

Cabomba furcata is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Cabomba furcata is also known as:

Cabomba piauhyensis | USDA symbol: CAPI22

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" — matching plants to their ideal growing conditions, so they'll thrive with less care and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection can be if you don't have the right information. While tags on nursery plants list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. You might be surprised to learn that popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. The table below gives insight into the preferred growing conditions of this plant throughout its geographical distribution.

Region
Preferred Habitat

Caribbean (PR, VI)

Obligate Wetland
Wetland Glossary
Obligate Wetland
Facultative Wetland
Facultative
Facultative Upland
Obligate Upland
Almost always occurs in wetlands
Usually occurs in wetlands but may occur in non-wetlands
Can occur in wetlands and non-wetlands
Usually occurs in non-wetlands but may occur in wetlands
Almost never occurs in wetlands

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Magnoliidae
Order: Nymphaeales
Family: Cabombaceae Rich. ex A. Rich. - Water-shield family
Genus: Cabomba Aubl. - fanwort

Species: Cabomba furcata Schult. & Schult. f. - forked fanwort

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