North America Native Plant

Wideleaf Indian Paintbrush

Botanical name: Castilleja exserta latifolia

USDA symbol: CAEXL

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Orthocarpus purpurascens Benth. var. latifolius S. Watson (ORPUL)   

Wideleaf Indian Paintbrush: A Rare California Native Worth Protecting Meet the wideleaf Indian paintbrush (Castilleja exserta latifolia), a charming annual wildflower that’s as special as it is elusive. This California native might not be the showiest plant in your garden, but it carries the kind of botanical street cred that ...

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. ⚘

Wideleaf Indian Paintbrush: A Rare California Native Worth Protecting

Meet the wideleaf Indian paintbrush (Castilleja exserta latifolia), a charming annual wildflower that’s as special as it is elusive. This California native might not be the showiest plant in your garden, but it carries the kind of botanical street cred that makes native plant enthusiasts do a little happy dance.

What Makes This Plant Special?

The wideleaf Indian paintbrush belongs to the fascinating world of forbs – those herbaceous plants that lack woody stems but pack plenty of personality. As an annual, this little beauty completes its entire life cycle in just one growing season, making every bloom a fleeting treasure worth celebrating.

This plant is a true California original, native to the Golden State and found nowhere else in its natural form. Its botanical name gives us a clue about its distinguishing feature – latifolia means broad-leaved, setting it apart from its narrower-leafed relatives.

Where Does It Call Home?

The wideleaf Indian paintbrush is endemic to California, meaning it’s evolved specifically for the unique conditions of this diverse state. While many plants have spread far and wide, this species has remained loyal to its California roots.

A Word About Rarity

Here’s where things get interesting – and important. This plant carries a conservation status that suggests it’s not exactly common. With a designation that indicates some level of conservation concern, the wideleaf Indian paintbrush is the kind of plant that makes botanists lean in a little closer.

If you’re lucky enough to encounter seeds or plants of this species, make sure they’re responsibly sourced. Never collect from wild populations, and always purchase from reputable native plant nurseries that can verify their stock’s origins.

Why Consider Growing It?

Choosing to grow wideleaf Indian paintbrush is like becoming a steward of California’s botanical heritage. Here’s why this annual deserves a spot in the right garden:

  • Conservation value: Growing rare natives helps preserve genetic diversity
  • True California character: Adds authentic local flora to your landscape
  • Educational opportunity: A conversation starter about native plant conservation
  • Ecological connections: Supports the web of life that evolved alongside it

The Growing Reality Check

Let’s be honest – detailed growing information for this specific variety is about as rare as the plant itself. What we do know is that it’s an annual forb, meaning it grows from seed each year and doesn’t develop woody stems.

As a California native, it’s likely adapted to the state’s Mediterranean climate patterns, probably preferring well-draining soils and the natural wet-winter, dry-summer rhythm that defines much of California’s weather.

Garden Design Considerations

The wideleaf Indian paintbrush isn’t going to be your garden’s main attraction – think of it more as a supporting character in the native plant story. Annual wildflowers like this work beautifully in:

  • Native plant gardens focused on local flora
  • Wildflower meadows and naturalized areas
  • Conservation gardens dedicated to rare species
  • Educational landscapes that tell California’s botanical story

The Bottom Line

Growing wideleaf Indian paintbrush isn’t for every gardener or every garden. It’s for those who appreciate the subtle beauty of California’s native flora and want to play a small part in conservation. If you can source it responsibly and provide appropriate growing conditions, you’ll be nurturing a piece of California’s irreplaceable natural heritage.

Just remember – with great botanical rarity comes great responsibility. Treat this plant like the natural treasure it is, and always prioritize conservation over cultivation.

Wideleaf 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 exserta (A. Heller) T.I. Chuang & Heckard - exserted 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