North America Native Plant

Mojave Halimolobos

Botanical name: Halimolobos jaegeri

USDA symbol: HAJA

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Halimolobos diffusa (A. Gray) O.E. Schulz var. jaegeri (Munz) Rollins (HADIJ)   

Mojave Halimolobos: A Rare Desert Gem That’s Not for Every Garden Meet Mojave halimolobos (Halimolobos jaegeri), one of the desert’s more elusive botanical treasures. This little-known member of the mustard family calls the harsh landscapes of the Mojave Desert home, but don’t expect to find it at your local nursery ...

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. ⚘

Mojave Halimolobos: A Rare Desert Gem That’s Not for Every Garden

Meet Mojave halimolobos (Halimolobos jaegeri), one of the desert’s more elusive botanical treasures. This little-known member of the mustard family calls the harsh landscapes of the Mojave Desert home, but don’t expect to find it at your local nursery anytime soon. Let’s explore why this rare perennial herb might capture your imagination, even if it doesn’t quite make it into your garden.

What Makes Mojave Halimolobos Special?

Mojave halimolobos is a perennial forb – essentially a non-woody flowering plant that returns year after year. As part of the mustard family, it produces small, delicate flowers that add subtle beauty to the desert landscape. This native species has adapted to survive in some of the most challenging growing conditions imaginable, making it a true testament to nature’s resilience.

Where Does It Call Home?

This desert specialist is native to the southwestern United States, specifically found in California and Nevada. Its range is quite limited, sticking to the Mojave Desert region where it has evolved to thrive in extreme conditions that would challenge most other plants.

The Rarity Reality Check

Here’s where things get serious: Mojave halimolobos has a Global Conservation Status of S4S5T3?, indicating some level of conservation concern. This rarity status means that if you’re lucky enough to encounter this plant in the wild, you should admire it from a distance and never collect seeds or plants from natural populations.

For the truly dedicated native plant enthusiast who wants to attempt growing this species, only use responsibly sourced material from reputable native plant specialists – though finding such sources may prove nearly impossible.

Why Most Gardeners Should Admire from Afar

Let’s be honest: Mojave halimolobos isn’t your typical garden-center find, and there are good reasons for that:

  • Extremely specialized growing requirements adapted to harsh desert conditions
  • Limited availability due to its rarity status
  • Challenging propagation and cultivation needs
  • Better suited for specialized botanical collections than home gardens

Growing Conditions (For the Truly Adventurous)

If you’re determined to attempt growing Mojave halimolobos, you’ll need to recreate desert conditions:

  • Full sun exposure
  • Extremely well-draining, sandy or rocky soil
  • Minimal water once established
  • USDA hardiness zones 8-10 (estimated based on native range)
  • Protection from humid conditions

Better Alternatives for Desert Gardens

Instead of trying to grow this rare species, consider these more readily available native alternatives that offer similar desert charm:

  • Desert marigold (Baileya multiradiata)
  • Brittlebush (Encelia farinosa)
  • Desert lupine (Lupinus arizonicus)
  • Ghost plant (Graptopetalum paraguayense)

The Bottom Line

Mojave halimolobos represents the fascinating diversity of our native flora, but it’s best appreciated in its natural habitat or through conservation efforts rather than home cultivation. For most gardeners, supporting desert plant conservation and choosing more readily available native alternatives will have a greater positive impact on both your garden success and regional ecosystems.

Sometimes the most beautiful way to honor a rare plant is simply knowing it exists and working to protect the wild spaces where it thrives.

Mojave Halimolobos

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Capparales

Family

Brassicaceae Burnett - Mustard family

Genus

Halimolobos Tausch - fissurewort

Species

Halimolobos jaegeri (Munz) Rollins - Mojave halimolobos

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