North America Native Plant

Smallstalk Necklace Fern

Botanical name: Lindsaea stricta var. jamesoniiformis

USDA symbol: LISTJ

Life cycle: perennial

Habit: forb

Native status: Native to Puerto Rico  

Discovering the Smallstalk Necklace Fern: A Puerto Rican Native Worth Knowing Meet the smallstalk necklace fern (Lindsaea stricta var. jamesoniiformis), a charming native fern that calls Puerto Rico home. While this delicate species might not be filling up garden center shelves anytime soon, it’s worth getting to know – especially ...

Rare plant alert!

Region: Conservation status by state

Status: S4S5T3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ Subspecies or variety is vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals. ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Discovering the Smallstalk Necklace Fern: A Puerto Rican Native Worth Knowing

Meet the smallstalk necklace fern (Lindsaea stricta var. jamesoniiformis), a charming native fern that calls Puerto Rico home. While this delicate species might not be filling up garden center shelves anytime soon, it’s worth getting to know – especially if you’re passionate about native plants and the unique flora of the Caribbean.

What Makes This Fern Special?

The smallstalk necklace fern belongs to the Lindsaea genus, a group of ferns known for their typically small, delicate fronds and intricate patterns. As a perennial fern, it returns year after year, making it a potentially valuable addition to naturalistic gardens in suitable climates.

Despite being classified botanically as a forb (a non-woody vascular plant), this is indeed a true fern. This classification simply reflects its growth structure – lacking the significant woody tissue you’d find in shrubs or trees, with growing points located at or below ground level.

Where You’ll Find It in the Wild

This fern is endemic to Puerto Rico, meaning it naturally occurs nowhere else in the world. Its limited geographic distribution makes it a special representative of Puerto Rico’s unique native flora.

The Garden Reality Check

Here’s where things get tricky for eager gardeners: reliable information about growing the smallstalk necklace fern is surprisingly scarce. Unlike popular garden ferns, this species hasn’t made the jump from wild native to cultivated garden plant. This lack of cultivation information presents both challenges and opportunities.

Conservation Considerations

The smallstalk necklace fern has a conservation status that’s somewhat unclear (listed as S4S5T3?), which suggests scientists are still working to understand its population status. This uncertainty is another reason why you won’t find it at your local nursery – and why any cultivation attempts should involve responsibly sourced plants if they become available.

What This Means for Your Garden

If you’re gardening in Puerto Rico or a similar tropical climate, keep an eye out for this native fern in restoration projects or specialized native plant sales. However, given the limited availability and unclear growing requirements, you might want to consider these alternatives:

  • Other native Puerto Rican ferns that are better established in cultivation
  • Similar small, delicate ferns suited to tropical climates
  • Supporting local conservation efforts that protect native fern habitats

The Bigger Picture

While the smallstalk necklace fern might not be the easiest addition to your garden right now, it represents something important: the incredible diversity of native plants that exist in places like Puerto Rico. Many of these species remain understudied and underutilized in gardening, representing untapped potential for future native landscaping projects.

Sometimes the most valuable plants aren’t the ones we can grow today, but the ones that remind us of the rich natural heritage worth protecting and understanding better. The smallstalk necklace fern is definitely one of those special species – a little green reminder of Puerto Rico’s unique botanical treasures.

Smallstalk Necklace Fern

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Polypodiales

Family

Dennstaedtiaceae Lotsy - Bracken Fern family

Genus

Lindsaea Dryand. ex Sm. - necklace fern

Species

Lindsaea stricta (Sw.) Dryand. ex Sm. - smallstalk necklace fern

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