Native Plants

Rugel’s Nailwort

Paronychia rugelii var. interior

USDA symbol: PARUI

annual forb

Lower 48 states: native

Meet Rugel’s nailwort (Paronychia rugelii var. interior), a petite native annual that’s flying under the radar in most gardening circles. This little forb might not be the showstopper you’d expect, but it has a story worth telling—especially if you’re passionate about preserving rare native plants. Rugel’s nailwort is a small ...

Rugel’s Nailwort may be listed as rare in your area.
Global Conservation Status

Status: S2?T2?Q | Subspecies or variety is imperiled: Extremely rare. Typically 6 to 20 occurrences or 1,000 to 3,000 remaining individuals.

Rugel’s Nailwort: A Rare Native Annual Worth Knowing About

Meet Rugel’s nailwort (Paronychia rugelii var. interior), a petite native annual that’s flying under the radar in most gardening circles. This little forb might not be the showstopper you’d expect, but it has a story worth telling—especially if you’re passionate about preserving rare native plants.

What Exactly Is Rugel’s Nailwort?

Rugel’s nailwort is a small herbaceous annual plant that belongs to the broader nailwort family. As a forb, it’s essentially a soft-stemmed plant without woody tissue—think of it as the gentle cousin in the plant world that completes its entire life cycle in just one growing season. You might also see it referenced by its scientific synonyms Odontonychia interior or Siphonychia interior in older botanical texts.

Where Does It Call Home?

This native beauty has a pretty exclusive address—you’ll only find it naturally occurring in Florida and Georgia. That’s it! This limited geographic distribution is part of what makes Rugel’s nailwort so special and, unfortunately, so vulnerable.

  • Species observed
  • No observations

The Rarity Factor: Why This Matters

Here’s where things get serious. Rugel’s nailwort carries a Global Conservation Status of S2?T2?Q, which essentially means it’s considered rare and potentially at risk. The question marks in that designation indicate there’s still some uncertainty about its exact conservation status, but the S2/T2 ranking suggests it’s uncommon throughout its range.

What does this mean for you as a gardener? If you’re lucky enough to encounter this plant or find seeds from a reputable, ethical source, you could play a small role in conservation. However, it’s crucial to ensure any plant material is responsibly sourced and not collected from wild populations.

Should You Grow Rugel’s Nailwort?

The honest answer is: it’s complicated. While supporting rare native plants is admirable, the limited information available about this particular variety makes it challenging to provide specific growing guidance. Additionally, its rarity means seeds or plants aren’t readily available through typical gardening channels.

If you do decide to grow Rugel’s nailwort, here’s what we know:

  • It’s an annual, so you’ll need to replant each year or allow it to self-seed
  • As a native to Florida and Georgia, it’s adapted to southeastern growing conditions
  • Being a forb, it likely prefers conditions similar to other small wildflowers
  • It probably plays a role in local ecosystems, though specific wildlife benefits aren’t well-documented

The Bottom Line

Rugel’s nailwort represents the fascinating world of specialized native plants that exist quietly in specific corners of our landscape. While it might not be the easiest plant to source or grow, its rarity makes it botanically significant.

If you’re in Florida or Georgia and interested in rare native plants, consider connecting with local native plant societies or botanical gardens—they might have more specific information about this elusive annual. In the meantime, supporting other well-documented native annuals in your area can provide similar ecological benefits while being much more practical for the home gardener.

Sometimes the most interesting plants are the ones that keep a little mystery about themselves, and Rugel’s nailwort certainly fits that description!

Paronychia rugelii var. interior 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. Paronychia rugelii var. interior is also known as:

Odontonychia interior | USDA symbol: ODIN
Siphonychia interior | USDA symbol: SIIN12

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.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Caryophyllidae
Order: Caryophyllales
Family: Caryophyllaceae Juss. - Pink family
Genus: Paronychia Mill. - nailwort

Species: Paronychia rugelii (Chapm.) Shuttlw. ex Chapm. - Rugel's nailwort

Variety: Paronychia rugelii (Chapm.) Shuttlw. ex Chapm. var. interior (Small) Chaudhri - Rugel's nailwort

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