North America Native Plant

Lastarriaea

Botanical name: Lastarriaea

USDA symbol: LASTA

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Lastarriaea: California’s Most Mysterious Native Annual If you’re the type of gardener who loves a botanical mystery, then Lastarriaea might just capture your imagination. This enigmatic California native is one of those plants that exists on the fringes of the gardening world—known to botanists but virtually unknown to home gardeners. ...

Lastarriaea: California’s Most Mysterious Native Annual

If you’re the type of gardener who loves a botanical mystery, then Lastarriaea might just capture your imagination. This enigmatic California native is one of those plants that exists on the fringes of the gardening world—known to botanists but virtually unknown to home gardeners. And honestly? There’s a good reason for that.

What Exactly Is Lastarriaea?

Lastarriaea is an annual forb native to California, which means it’s a soft-stemmed, herbaceous plant that completes its entire life cycle in just one growing season. Unlike perennials that return year after year, this little plant lives fast and dies young, relying on seeds to carry on the family line.

As a forb, Lastarriaea lacks the woody stems you’d find on shrubs or trees. Instead, it’s got that tender, green growth that’s typical of wildflowers and many garden herbs. Think of it as nature’s own annual wildflower, though you’re unlikely to find it at your local nursery.

Where Does Lastarriaea Call Home?

This mysterious plant is a true California native, found exclusively within the Golden State. While we know it grows somewhere in California’s diverse landscapes, the exact locations and habitats where you might stumble upon Lastarriaea in the wild remain largely undocumented in readily available sources.

Should You Try Growing Lastarriaea?

Here’s where things get tricky. While Lastarriaea might sound like an intriguing addition to a native California garden, there are several challenges you’ll face:

  • Extremely limited availability—you won’t find seeds or plants in commerce
  • Unknown growing requirements and care needs
  • Potentially very specific habitat requirements
  • Unclear conservation status

If you’re drawn to the idea of growing rare California natives, you might be better served by choosing better-documented species that offer similar benefits but with known growing requirements.

Better Alternatives for Native California Gardens

Instead of chasing this botanical ghost, consider these well-documented California native annuals that will give you that authentic wildflower experience:

  • California poppies (Eschscholzia californica) – the state flower with brilliant orange blooms
  • Baby blue eyes (Nemophila menziesii) – delicate blue flowers perfect for spring color
  • Tidy tips (Layia platyglossa) – cheerful yellow and white daisy-like flowers
  • California lupine (Lupinus nanus) – beautiful blue spikes that support native bees

The Bottom Line

Lastarriaea represents one of those fascinating corners of California’s native flora that remains largely mysterious to home gardeners. While its status as a true California native makes it botanically interesting, the lack of available information, seeds, or plants makes it an impractical choice for most gardeners.

If you’re passionate about supporting California’s native ecosystems, focus your energy on the many well-documented native species that are readily available and have known benefits for pollinators and wildlife. Save the botanical detective work for the professionals, and fill your garden with natives that you can actually grow successfully!

Sometimes the most responsible thing we can do as native plant enthusiasts is to appreciate certain species from afar while supporting conservation through the plants we can actually cultivate and care for properly.

Lastarriaea

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Polygonales

Family

Polygonaceae Juss. - Buckwheat family

Genus

Lastarriaea Remy - lastarriaea

Species

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