North America Native Plant

Howelliella

Botanical name: Howelliella

USDA symbol: HOWEL2

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Howelliella: A Mysterious Native California Annual If you’ve stumbled across the name howelliella in your native plant research, you’re likely wondering what exactly this plant is and whether it belongs in your garden. Well, you’ve discovered one of California’s most enigmatic native plants – and there’s both good news and ...

Howelliella: A Mysterious Native California Annual

If you’ve stumbled across the name howelliella in your native plant research, you’re likely wondering what exactly this plant is and whether it belongs in your garden. Well, you’ve discovered one of California’s most enigmatic native plants – and there’s both good news and challenging news about this little-known species.

What is Howelliella?

Howelliella is a native annual forb that calls California home. As a forb, it’s an herbaceous flowering plant without woody stems – think of it as nature’s version of a wildflower that completes its entire life cycle in a single growing season. This puts it in the same category as many beloved native annuals that paint California’s landscapes with seasonal color.

The plant belongs to the dicot group, meaning it starts life with two seed leaves, and like all forbs, it lacks the woody tissue that defines shrubs and trees. Instead, it’s designed for a live fast, bloom beautifully lifestyle that’s perfectly adapted to California’s Mediterranean climate patterns.

Where Does Howelliella Grow?

This native gem is found exclusively in California, making it a true Golden State endemic. However, pinning down exactly where you might encounter howelliella in the wild is where things get tricky – this plant appears to be extremely rare or possibly restricted to very specific habitats that haven’t been widely documented in gardening literature.

The Challenge with Growing Howelliella

Here’s where we need to be honest: howelliella is one of those native plants that exists more in scientific records than in garden centers. Unlike popular California natives like poppies or lupines, detailed growing information for howelliella is virtually non-existent in horticultural sources. This could mean several things:

  • The plant may be extremely rare in the wild
  • It might have very specific growing requirements that make cultivation challenging
  • It could be primarily of interest to botanists rather than gardeners
  • Seeds or plants may not be commercially available

What This Means for Your Garden

If you’re passionate about growing native California plants, the mystery surrounding howelliella actually highlights an important aspect of native plant gardening: not every native species is suited for cultivation, and that’s perfectly okay! California’s flora is incredibly diverse, with some plants thriving in gardens while others are best appreciated in their natural habitats.

Instead of focusing on this elusive annual, consider these well-documented California native alternatives that offer similar annual forb characteristics:

  • California poppies (Eschscholzia californica) for vibrant orange blooms
  • Baby blue eyes (Nemophila menziesii) for delicate blue flowers
  • Clarkia species for colorful summer displays
  • Annual lupines for nitrogen-fixing benefits

The Importance of Rare Natives

While howelliella might not end up in your garden, its existence reminds us why protecting California’s diverse ecosystems matters. Every native plant, no matter how obscure, plays a role in the complex web of relationships that support local wildlife, soil health, and ecosystem stability.

If you’re interested in supporting rare California natives, consider getting involved with local native plant societies, habitat restoration projects, or botanical research institutions. These organizations often work to protect and study plants like howelliella that might otherwise slip through the cracks of conservation efforts.

Moving Forward with Native Plant Gardening

Don’t let the mystery of howelliella discourage your native plant journey! California offers an abundance of well-documented, garden-worthy native species that can provide the ecological benefits and natural beauty you’re seeking. Focus on plants with known growing requirements and available sources – your garden and local wildlife will thank you for it.

Sometimes the most valuable lesson a plant can teach us is that nature still holds secrets worth protecting, even if we can’t bring them home to our gardens.

Howelliella

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

Howelliella Rothm. - howelliella

Species

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