North America Native Plant

Porsild’s Starwort

Botanical name: Stellaria porsildii

USDA symbol: STPO8

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Porsild’s Starwort: A Rare Southwestern Treasure Best Left Wild Meet Porsild’s starwort (Stellaria porsildii), one of the Southwest’s most elusive native plants. If you’ve never heard of this little forb, you’re not alone – and there’s a very good reason why you won’t find it at your local nursery. What ...

Rare plant alert!

Region: Conservation status by state

Status: S1: Status is uncertain but is somewhere between the following rankings: Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘

Porsild’s Starwort: A Rare Southwestern Treasure Best Left Wild

Meet Porsild’s starwort (Stellaria porsildii), one of the Southwest’s most elusive native plants. If you’ve never heard of this little forb, you’re not alone – and there’s a very good reason why you won’t find it at your local nursery.

What Makes Porsild’s Starwort So Special?

Porsild’s starwort is a native perennial forb that calls the American Southwest home. Like other members of the Stellaria genus, it’s a non-woody plant that dies back to ground level each year, only to emerge again when conditions are right. But here’s where things get interesting – this isn’t your garden-variety wildflower.

Where Does It Grow?

This rare beauty has been documented in just two states: Arizona and New Mexico. Its distribution is so limited that researchers have found it in only a handful of locations across these southwestern landscapes.

The Rarity Reality Check

Here’s the deal: Porsild’s starwort carries a Global Conservation Status of S1, which means it’s critically imperiled. In conservation speak, that translates to having typically five or fewer known occurrences and fewer than 1,000 individual plants remaining in the wild. That’s seriously rare territory – we’re talking about a plant that’s hanging on by a thread.

Why You Shouldn’t Plant It (Even If You Could)

While the idea of growing rare native plants might sound appealing, Porsild’s starwort falls into the look but don’t touch category. Here’s why:

  • Extreme rarity: With so few plants remaining in the wild, every individual matters for the species’ survival
  • Unknown cultivation requirements: Scientists know so little about this species that successful growing conditions remain a mystery
  • Conservation priority: Efforts should focus on protecting existing wild populations rather than attempting cultivation
  • Likely unavailable: Responsible nurseries won’t sell plants this rare without proper conservation protocols

What You Can Do Instead

If you’re drawn to native southwestern plants, there are plenty of other starwort species and native forbs that you can grow responsibly. Consider these alternatives:

  • Common chickweed (Stellaria media) – a more widespread relative
  • Other native southwestern forbs that support local ecosystems
  • Participating in native plant society conservation efforts
  • Supporting habitat preservation in Arizona and New Mexico

The Bigger Picture

Porsild’s starwort serves as a reminder of how much botanical diversity exists in our native landscapes – and how fragile some of it can be. While we can’t bring this particular species into our gardens, we can celebrate it by protecting the wild spaces where it still clings to existence.

Sometimes the best way to honor a native plant is to let it be wild and focus our gardening efforts on species that can benefit from our care without risking their survival. In the case of Porsild’s starwort, admiration from afar is the most responsible approach.

Porsild’s Starwort

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Caryophyllales

Family

Caryophyllaceae Juss. - Pink family

Genus

Stellaria L. - starwort

Species

Stellaria porsildii Chinnappa - Porsild's starwort

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