North America Native Plant

Diamondleaf Lacefern

Botanical name: Ctenitis hirta var. portoricana

USDA symbol: CTHIP

Life cycle: perennial

Habit: forb

Native status: Native to Puerto Rico  

Diamondleaf Lacefern: A Rare Puerto Rican Native Worth Knowing If you’re fascinated by rare native plants and have a soft spot for ferns, let me introduce you to the diamondleaf lacefern (Ctenitis hirta var. portoricana). This intriguing perennial fern is one of Puerto Rico’s native treasures, though you won’t find ...

Diamondleaf Lacefern: A Rare Puerto Rican Native Worth Knowing

If you’re fascinated by rare native plants and have a soft spot for ferns, let me introduce you to the diamondleaf lacefern (Ctenitis hirta var. portoricana). This intriguing perennial fern is one of Puerto Rico’s native treasures, though you won’t find much chatter about it in your typical gardening circles – and there’s a good reason for that.

What Makes This Fern Special?

The diamondleaf lacefern belongs to a group of plants that have been quietly doing their thing for millions of years. As a perennial fern, it’s what botanists call a forb – essentially a non-woody plant that comes back year after year. Unlike the flashy flowering plants that dominate most garden conversations, ferns like this one reproduce through spores and add a completely different texture and feel to natural landscapes.

Where Does It Call Home?

This particular variety is exclusively native to Puerto Rico, making it a true island endemic. You won’t stumble across it in your mainland adventures – it’s perfectly content in its Caribbean home.

The Reality Check: Should You Grow It?

Here’s where things get a bit tricky. While the diamondleaf lacefern sounds like it could be a fantastic addition to the right garden, there’s surprisingly little information available about its specific growing requirements, availability, or even its current conservation status. This lack of readily available information suggests a few possibilities:

  • It might be quite rare in the wild
  • It could be challenging to cultivate outside its natural habitat
  • Commercial availability is likely extremely limited or non-existent

What We Do Know

As a native Puerto Rican fern, the diamondleaf lacefern would theoretically be perfect for:

  • Native plant enthusiasts in Puerto Rico
  • Collectors of rare ferns
  • Conservation-minded gardeners supporting local ecosystems

Like most ferns, it probably appreciates:

  • Filtered light or partial shade
  • Consistent moisture
  • Well-draining but organic-rich soil
  • Protection from harsh winds

The Conservation Angle

If you’re lucky enough to live in Puerto Rico and encounter this fern, consider yourself fortunate to witness a piece of your island’s unique botanical heritage. However, if you’re interested in growing rare native ferns, it’s crucial to ensure any plant material comes from responsible, sustainable sources – never from wild collection.

Alternatives for Fern Lovers

If you’re drawn to the idea of growing native ferns but can’t access diamondleaf lacefern, consider researching other native fern species in your area. Every region has its own special ferns that can provide that lush, prehistoric garden vibe while supporting local ecosystems.

The diamondleaf lacefern remains something of a botanical mystery – a reminder that there are still plenty of native plants waiting to be better understood and appreciated. Sometimes the most interesting plants are the ones that keep a little mystery about themselves!

Diamondleaf Lacefern

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Polypodiales

Family

Dryopteridaceae Herter - Wood Fern family

Genus

Ctenitis (C. Chr.) C. Chr. ex Tardieu-Blot & C. Chr. - lacefern

Species

Ctenitis hirta (Sw.) Ching - diamondleaf lacefern

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