North America Native Plant

Port Clarence Indian Paintbrush

Botanical name: Castilleja caudata var. auricoma

USDA symbol: CACAA

Life cycle: perennial

Habit: forb

Native status: Native to Alaska  

Port Clarence Indian Paintbrush: A Rare Arctic Beauty Meet the Port Clarence Indian paintbrush (Castilleja caudata var. auricoma), one of Alaska’s most elusive wildflowers. This remarkable perennial forb represents a unique variety of Indian paintbrush that calls the frigid Arctic home, making it a true botanical treasure for those fascinated ...

Rare plant alert!

Region: Conservation status by state

Status: S5T1T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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) ⚘ 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. ⚘ 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. ⚘

Port Clarence Indian Paintbrush: A Rare Arctic Beauty

Meet the Port Clarence Indian paintbrush (Castilleja caudata var. auricoma), one of Alaska’s most elusive wildflowers. This remarkable perennial forb represents a unique variety of Indian paintbrush that calls the frigid Arctic home, making it a true botanical treasure for those fascinated by extreme-climate plants.

Where Does It Call Home?

This rare variety is native exclusively to Alaska, with its distribution centered around the Port Clarence area. It’s a true Alaskan endemic, having evolved to thrive in some of the harshest growing conditions on the continent. The plant grows as a hardy perennial forb, meaning it’s an herbaceous plant without woody stems that returns year after year despite the brutal Arctic winters.

A Word of Caution: Rarity Matters

Before we dive into growing tips, there’s something important you need to know. Port Clarence Indian paintbrush has a Global Conservation Status that indicates conservation concern. This means it’s quite rare in the wild, and any cultivation should only be attempted with responsibly sourced plant material. Never collect from wild populations, as this could further threaten this already uncommon variety.

Why Would You Want to Grow It?

Like other Indian paintbrush species, this variety likely produces the characteristic colorful bracts that make these plants so striking. The paintbrush appearance comes from modified leaves called bracts that surround the small, inconspicuous flowers. These bracts typically display vibrant colors that can range from red to orange to yellow.

For specialized Arctic gardeners or botanical enthusiasts, this plant represents:

  • A connection to one of North America’s most extreme ecosystems
  • Potential benefits for Arctic pollinators and wildlife
  • A unique addition to cold-climate native plant collections
  • Educational value for understanding Arctic plant adaptations

The Reality Check: Growing Challenges

Let’s be honest – this isn’t your typical backyard flower. Port Clarence Indian paintbrush evolved for life in Arctic Alaska, which means it has some pretty specific (and extreme) requirements:

  • Climate needs: Requires genuine Arctic conditions, likely thriving only in USDA hardiness zones 1-3
  • Specialized habitat: Adapted to short growing seasons, permafrost conditions, and extreme temperature fluctuations
  • Limited availability: Due to its rarity and specialized needs, this plant is not commercially available
  • Expert-level growing: Successfully cultivating this variety would require extensive knowledge of Arctic plant cultivation

Alternative Options for Most Gardeners

Unless you live in Arctic Alaska or have access to specialized arctic plant growing facilities, you’ll likely have better success with other native Castilleja species that are adapted to your local climate. Many regions have their own native Indian paintbrush varieties that offer similar aesthetic appeal while being much more suitable for local growing conditions.

Consider researching Indian paintbrush species native to your area – they’ll provide the same stunning painted appearance while supporting your local ecosystem and pollinators.

For the Truly Determined

If you’re a botanical researcher, arctic plant specialist, or have access to controlled growing environments, remember that any attempt to cultivate this rare variety must use responsibly sourced material. Work with botanical institutions, seed banks, or specialized native plant societies that can provide ethically obtained plant material.

The Port Clarence Indian paintbrush serves as a reminder of the incredible diversity of plant life that has adapted to our planet’s most challenging environments. While most of us will never grow this Arctic beauty in our gardens, we can appreciate its specialized nature and the important role it plays in Alaska’s unique ecosystem.

Port Clarence Indian Paintbrush

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Castilleja Mutis ex L. f. - Indian paintbrush

Species

Castilleja caudata (Pennell) Rebr. - Port Clarence Indian paintbrush

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