North America Native Plant

Veiny Pepperweed

Botanical name: Lepidium oblongum var. insulare

USDA symbol: LEOBI

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Veiny Pepperweed: A Little-Known California Native If you’re on the hunt for truly unique native plants for your California garden, you might have stumbled across the intriguing name veiny pepperweed. This botanical gem, scientifically known as Lepidium oblongum var. insulare, represents one of those fascinating native species that flies under ...

Veiny Pepperweed: A Little-Known California Native

If you’re on the hunt for truly unique native plants for your California garden, you might have stumbled across the intriguing name veiny pepperweed. This botanical gem, scientifically known as Lepidium oblongum var. insulare, represents one of those fascinating native species that flies under the radar of most gardeners – and for good reason, as you’ll soon discover.

What Exactly Is Veiny Pepperweed?

Veiny pepperweed is a native California forb, which is botanist-speak for a non-woody plant that isn’t a grass. Think of it as nature’s version of a wildflower – it lacks the thick, woody stems of shrubs and trees, instead sporting softer, herbaceous growth that emerges fresh each growing season.

This particular variety is classified as either an annual or biennial, meaning it completes its life cycle in one to two years. Like many members of the mustard family (yes, it’s related to your garden’s arugula!), it likely produces small, delicate flowers followed by tiny seed pods.

Where Does It Call Home?

This native beauty is exclusive to California, making it a true Golden State endemic. However, pinning down exactly where in California you might encounter veiny pepperweed is tricky – this variety appears to be quite localized and isn’t widely documented in botanical surveys.

The Challenge: Limited Growing Information

Here’s where things get interesting (and a bit frustrating for curious gardeners): veiny pepperweed is one of those native plants that exists more in botanical record books than in garden centers. Very little information is available about its specific growing requirements, appearance, or garden performance.

This lack of cultivation information suggests that Lepidium oblongum var. insulare might be:

  • Extremely rare or localized in the wild
  • Difficult to cultivate outside its natural habitat
  • Simply overlooked by the horticultural community
  • Not particularly showy or garden-worthy compared to other natives

Should You Try Growing It?

The honest answer? It’s complicated. While veiny pepperweed is undoubtedly a legitimate California native (and therefore ecologically valuable), the lack of available growing information makes it a challenging choice for most home gardeners.

If you’re determined to grow native Lepidium species, you might have better luck with more widely available relatives that share similar ecological benefits but come with actual growing instructions and seed sources.

Better Native Alternatives

Instead of hunting for the elusive veiny pepperweed, consider these well-documented California native alternatives:

  • Common peppergrass (Lepidium nitidum) – A more widely available relative
  • California mustard (Guillenia lasiophylla) – Another mustard family native
  • Chia (Salvia hispanica) – Native annual with similar growing habits
  • Elegant clarkia (Clarkia unguiculata) – Showy annual wildflower

The Bottom Line

Veiny pepperweed represents one of those botanical mysteries that remind us how much we still don’t know about our native flora. While its native status makes it ecologically significant, the lack of cultivation information means it’s not practical for most gardeners.

If you’re passionate about growing the rarest of the rare natives, you might try contacting local botanical gardens, native plant societies, or university extension programs to see if anyone has experience with this particular variety. Otherwise, stick with the many well-documented California natives that will give you both ecological benefits and gardening success.

Sometimes the most responsible approach to conservation is supporting the native plants we can actually grow successfully – leaving the truly rare and mysterious ones to the botanists and specialized conservationists who have the expertise to study and protect them properly.

Veiny Pepperweed

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

Lepidium L. - pepperweed

Species

Lepidium oblongum Small - veiny pepperweed

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