North America Native Plant

Serpentine Indian Pink

Botanical name: Silene hookeri serpentinicola

USDA symbol: SIHOS

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Silene serpentinicola T.W. Nelson & J.P. Nelson (SISE10)   

Serpentine Indian Pink: A Rare Gem for the Dedicated Native Plant Gardener Meet the serpentine Indian pink (Silene hookeri serpentinicola), a botanical treasure that’s as finicky as it is fascinating. This delicate perennial wildflower isn’t your typical garden center find – and for good reason. It’s a rare native species ...

Rare plant alert!

Region: Conservation status by state

Status: S2: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘

Serpentine Indian Pink: A Rare Gem for the Dedicated Native Plant Gardener

Meet the serpentine Indian pink (Silene hookeri serpentinicola), a botanical treasure that’s as finicky as it is fascinating. This delicate perennial wildflower isn’t your typical garden center find – and for good reason. It’s a rare native species that calls some of the most challenging growing conditions home.

What Makes This Plant Special

The serpentine Indian pink is a true California and Oregon native, belonging to the pink family (Caryophyllaceae). As a perennial forb – that’s garden-speak for a non-woody flowering plant – it returns year after year with its charming display of small, white to pale pink blooms. The flowers feature the characteristic deeply notched petals that give plants in the pink family their distinctive appearance.

This plant is also known by its synonym, Silene serpentinicola, though you’re most likely to encounter it under its current scientific name in botanical references.

Where Does It Grow?

The serpentine Indian pink has a very specific geographic range, naturally occurring in California and Oregon. But here’s the kicker – it doesn’t just grow anywhere in these states. This specialized plant has evolved to thrive in serpentine soils, those unusual mineral-rich, often toxic growing conditions that most plants simply can’t handle.

A Word of Caution: This Plant is Rare

Before you get too excited about adding this beauty to your garden, there’s something important you need to know. The serpentine Indian pink has a Global Conservation Status of S2, which means it’s considered Imperiled. With typically only 6 to 20 known occurrences and possibly just 1,000 to 3,000 individual plants remaining, this species is extremely vulnerable to extinction.

What does this mean for gardeners? If you’re determined to grow this rare native, you must – and we can’t stress this enough – only obtain plants or seeds from responsibly sourced material. Never collect from wild populations, and always purchase from reputable native plant nurseries that can guarantee their stock is ethically propagated.

Why Grow Serpentine Indian Pink?

Despite the challenges, there are compelling reasons why dedicated native plant enthusiasts might want to attempt growing this species:

  • Conservation impact: Growing rare natives in cultivation can help preserve genetic diversity and potentially support reintroduction efforts
  • Unique beauty: The delicate flowers provide a subtle, understated elegance that’s perfect for specialized garden settings
  • Pollinator support: Native bees and butterflies benefit from this indigenous nectar source
  • Educational value: It’s a conversation starter about habitat specialization and plant conservation

Growing Conditions and Care

Here’s where things get tricky. The serpentine Indian pink isn’t called serpentine for nothing – it requires very specific soil conditions that are extremely difficult to replicate in typical garden settings.

Soil requirements: This plant needs well-draining, mineral-rich soils that mimic its native serpentine habitat. Regular garden soil won’t cut it. You’ll need to create a specialized growing medium with specific mineral content and drainage characteristics.

Light conditions: Provide full sun to partial shade, similar to its natural habitat on rocky slopes and openings.

USDA Hardiness Zones: This species is suited for zones 8-10, reflecting its native range in California and Oregon.

Watering: Once established, it prefers minimal supplemental watering, as it’s adapted to the Mediterranean climate patterns of its native range.

Best Garden Settings

The serpentine Indian pink is best suited for:

  • Specialized rock gardens with mineral-rich substrates
  • Native plant collections focused on rare species
  • Botanical gardens or educational landscapes
  • Conservation-focused residential gardens

This isn’t a plant for beginners or for typical perennial borders. It requires a gardener who’s willing to research, experiment, and possibly fail while learning to meet its very specific needs.

The Bottom Line

The serpentine Indian pink represents both an opportunity and a responsibility. While its rarity and specific growing requirements make it a challenging garden subject, successfully growing this species can contribute to conservation efforts and provide habitat for native pollinators. However, approach this plant with respect for its conservation status and realistic expectations about the challenges involved.

If you’re not ready for the specialized care this rare beauty requires, consider supporting its conservation by donating to organizations working to protect serpentine habitats, or focus on growing other native Silene species that are less rare and more garden-friendly. Sometimes the best way to appreciate a rare plant is to protect it in its natural habitat rather than attempting to grow it in ours.

Serpentine Indian Pink

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

Silene L. - catchfly

Species

Silene hookeri Nutt. - Hooker's silene

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