North America Native Plant

Sierra Madre Lobelia

Botanical name: Lobelia laxiflora var. angustifolia

USDA symbol: LOLAA

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Sierra Madre Lobelia: A Rare Arizona Native Worth Knowing If you’re looking to add authentic southwestern charm to your garden, you might want to get acquainted with Sierra Madre lobelia (Lobelia laxiflora var. angustifolia). This lesser-known native perennial represents the kind of regional treasure that makes Arizona’s flora so special ...

Rare plant alert!

Region: Conservation status by state

Status: S4T3T4: Status is uncertain but is somewhere between the following rankings: 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 ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘

Sierra Madre Lobelia: A Rare Arizona Native Worth Knowing

If you’re looking to add authentic southwestern charm to your garden, you might want to get acquainted with Sierra Madre lobelia (Lobelia laxiflora var. angustifolia). This lesser-known native perennial represents the kind of regional treasure that makes Arizona’s flora so special – though fair warning, you won’t find much about this particular variety in your typical gardening guides.

What Makes Sierra Madre Lobelia Special?

Sierra Madre lobelia is a native forb that belongs to Arizona’s natural heritage. As a perennial herb, it lacks the woody stems of shrubs and trees, instead growing as a soft-stemmed plant that returns year after year. This growth habit makes it quite different from the flashier desert natives that usually steal the spotlight.

What’s particularly intriguing about this plant is its rarity. With a conservation status that suggests it’s not exactly common in the wild, Sierra Madre lobelia represents the kind of specialized regional flora that makes native gardening so rewarding – you’re literally helping preserve a piece of Arizona’s botanical heritage right in your backyard.

Where Does It Call Home?

This lobelia variety is exclusively found in Arizona, making it a true southwestern endemic. Its limited geographic range adds to both its conservation value and its appeal for gardeners who want to showcase plants that are genuinely local to their region.

Should You Grow Sierra Madre Lobelia?

Here’s where things get both exciting and challenging. As a native Arizona perennial, Sierra Madre lobelia has several things going for it:

  • It’s perfectly adapted to local conditions
  • Supporting native plants helps local ecosystems
  • Once established, native plants typically require less water and maintenance
  • You’d be growing something truly unique to your region

However, there’s a catch – and it’s a big one. Information about this specific variety is remarkably scarce. We don’t have detailed data on its growing requirements, mature size, flower characteristics, or specific care needs. This makes it more of an adventure plant for experienced native gardeners rather than a sure bet for beginners.

The Growing Challenge

If you’re determined to try growing Sierra Madre lobelia, you’ll need to approach it as somewhat of a gardening detective. Since specific growing information isn’t readily available, you’d need to:

  • Source plants or seeds from reputable native plant specialists (crucial given its rarity status)
  • Experiment with typical Arizona native growing conditions
  • Connect with local native plant societies for regional expertise
  • Be prepared for some trial and error

The lack of detailed growing guides means you’d be pioneering rather than following established practices – which could be either frustrating or thrilling, depending on your gardening personality.

A Word About Responsible Sourcing

Given Sierra Madre lobelia’s rarity status, it’s crucial that any plants or seeds come from ethical sources that don’t impact wild populations. Never collect from the wild, and always verify that commercial sources are propagating plants responsibly rather than wild-harvesting them.

The Bottom Line

Sierra Madre lobelia represents native gardening at its most authentic – and most challenging. While we can’t provide specific growing instructions due to limited available information, this Arizona endemic offers the chance to cultivate something truly special and regionally significant.

If you’re an experienced native gardener looking for a unique challenge, or if you’re passionate about conserving Arizona’s botanical heritage, Sierra Madre lobelia might be worth investigating. Just be prepared to become part researcher, part experimenter, and part conservation advocate in the process.

For most gardeners seeking reliable Arizona natives, there are many better-documented options available. But for those drawn to botanical mysteries and conservation challenges, Sierra Madre lobelia offers the chance to grow something genuinely rare and regionally important – assuming you can track it down and figure out how to grow it successfully.

Sierra Madre Lobelia

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

Campanulales

Family

Campanulaceae Juss. - Bellflower family

Genus

Lobelia L. - lobelia

Species

Lobelia laxiflora Kunth - Sierra Madre lobelia

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