Native Plants

Clambering Polypody

Polypodium loriceum

USDA symbol: POLO5

perennial forb

Puerto Rico: native

Meet the clambering polypody (Polypodium loriceum), a rather enigmatic fern species that calls Puerto Rico home. While this perennial fern might not be a household name in gardening circles, it represents an interesting piece of Puerto Rico’s native plant heritage that’s worth getting to know. The clambering polypody belongs to ...

Clambering Polypody: A Mysterious Native Fern of Puerto Rico

Meet the clambering polypody (Polypodium loriceum), a rather enigmatic fern species that calls Puerto Rico home. While this perennial fern might not be a household name in gardening circles, it represents an interesting piece of Puerto Rico’s native plant heritage that’s worth getting to know.

What Exactly Is Clambering Polypody?

The clambering polypody belongs to the large Polypodium genus, which includes hundreds of fern species worldwide. You might also see it listed under its synonym Serpocaulon loriceum in some botanical references. As its common name suggests, this fern has a somewhat climbing or sprawling growth habit, though detailed descriptions of its appearance are surprisingly scarce in horticultural literature.

Where Does It Come From?

This fern is native exclusively to Puerto Rico, making it a true island endemic. Its natural range is quite limited, found only within Puerto Rican ecosystems where it has evolved to thrive in the island’s unique climate and conditions.

  • Species observed
  • No observations

A Water-Loving Species

One thing we do know for certain about clambering polypody is its strong affinity for wet conditions. This fern is classified as an obligate wetland species in the Caribbean region, meaning it almost always occurs in wetland environments. This gives us a big clue about where you might encounter it in the wild – think stream banks, wet forest floors, or other consistently moist habitats.

Is It Right for Your Garden?

Here’s where things get a bit tricky. While clambering polypody is undoubtedly an interesting native species, practical information about cultivating it is extremely limited. This could be for several reasons:

  • It may have very specific growing requirements that are difficult to replicate in typical garden settings
  • It might be naturally rare or have a very restricted habitat
  • Commercial availability is likely non-existent

If you’re a Puerto Rican gardener interested in native plants, your best bet would be to work with local native plant societies or botanical institutions who might have more detailed knowledge about this species.

Better Native Alternatives

For gardeners in Puerto Rico looking to incorporate native ferns into their landscapes, consider exploring other well-documented native Polypodium species or other indigenous ferns that are better understood and more readily available. Local botanical gardens and native plant groups can be invaluable resources for discovering suitable alternatives that will thrive in your specific conditions.

The Bigger Picture

Even if clambering polypody isn’t destined for your garden bed, it serves as a reminder of the incredible plant diversity found in Puerto Rico’s native ecosystems. Every endemic species, no matter how obscure, plays a role in maintaining the island’s unique ecological heritage. Supporting conservation efforts and choosing well-documented native plants for your garden helps protect the broader ecosystem that species like clambering polypody call home.

Sometimes the most fascinating plants are the ones that remain mysterious, quietly going about their business in their preferred wetland homes while we’re still learning about their secrets.

Polypodium loriceum 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. Polypodium loriceum is also known as:

Serpocaulon loriceum | USDA symbol: SELO6

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: Fern
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Division: Pteridophyta - Ferns
Class: Filicopsida
Order: Polypodiales
Family: Polypodiaceae J. Presl & C. Presl - Polypody family
Genus: Polypodium L. - polypody

Species: Polypodium loriceum L. - clambering polypody

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