North America Native Plant

King’s Gold

Botanical name: Twisselmannia

USDA symbol: TWISS

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

King’s Gold: The Mystery Annual That’s Got California Gardeners Curious Ever stumbled across a plant name that sounds like it belongs in a fairy tale? Meet king’s gold (Twisselmannia), one of California’s most enigmatic native wildflowers. This annual forb is so elusive that even seasoned botanists scratch their heads when ...

King’s Gold: The Mystery Annual That’s Got California Gardeners Curious

Ever stumbled across a plant name that sounds like it belongs in a fairy tale? Meet king’s gold (Twisselmannia), one of California’s most enigmatic native wildflowers. This annual forb is so elusive that even seasoned botanists scratch their heads when it comes up in conversation.

What Exactly Is King’s Gold?

King’s gold is an annual forb native to California, meaning it completes its entire life cycle in just one growing season. As a forb, it’s essentially a non-woody flowering plant that lacks the thick, permanent stems you’d find on shrubs or trees. Instead, it produces fresh growth each year from seed, living fast and (presumably) blooming beautifully before setting seed for the next generation.

The scientific name Twisselmannia hints at this plant’s rarity in cultivation and study. Unlike common California natives that fill nursery shelves and gardening guides, king’s gold remains something of a botanical mystery.

Where Does King’s Gold Call Home?

This native beauty is found exclusively in California, making it a true Golden State endemic. However, the specific regions, elevation ranges, and habitat types where it thrives remain poorly documented in available gardening resources.

Should You Try Growing King’s Gold?

Here’s where things get tricky. While the romantic name king’s gold certainly sparks the imagination, the reality is that very little is known about this plant’s:

  • Specific growing requirements
  • Appearance and flower characteristics
  • Preferred soil conditions
  • Water needs
  • USDA hardiness zones
  • Availability in the nursery trade

The Responsible Gardener’s Dilemma

When dealing with such an obscure native species, responsible gardening practices become especially important. Since we don’t know the rarity status of king’s gold, it’s crucial to:

  • Never collect seeds or plants from wild populations
  • Only source materials from reputable native plant nurseries
  • Contact local botanical societies or university extension offices for guidance
  • Consider well-documented California native alternatives if king’s gold proves unavailable

Better-Known California Annual Alternatives

If king’s gold remains elusive, California offers plenty of spectacular annual natives that are well-documented and readily available:

  • California poppies (Eschscholzia californica) – the state flower!
  • Baby blue eyes (Nemophila menziesii)
  • Tidy tips (Layia platyglossa)
  • Goldfields (Lasthenia californica)

The Bottom Line

King’s gold represents one of those fascinating plant mysteries that make botany so intriguing. While its scarcity in cultivation and documentation means it’s not a practical choice for most gardeners, its very existence reminds us that California’s native flora still holds secrets waiting to be discovered.

If you’re drawn to rare and unusual natives, consider connecting with local botanical societies, native plant groups, or university herbariums. They may have more detailed information about this elusive species and can guide you toward similar plants that are better suited for home cultivation.

Sometimes the most valuable plants in our gardens are the ones that teach us patience, research skills, and respect for the wild spaces where botanical treasures like king’s gold quietly persist.

King’s Gold

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

Twisselmannia Al-Shehbaz - king's gold

Species

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