North America Native Plant

Hoover’s Cryptantha

Botanical name: Cryptantha hooveri

USDA symbol: CRHO4

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Hoover’s Cryptantha: A Ghost from California’s Botanical Past Sometimes in the world of native plants, we encounter species that tell stories of loss and remind us why conservation matters. Meet Hoover’s cryptantha (Cryptantha hooveri), a small annual wildflower that once graced the landscapes of California but now exists only in ...

Rare plant alert!

Region: Conservation status by state

Status: SH: Status is uncertain but is somewhere between the following rankings: Possibly Extinct: Known only from historical occurrences. Still some hope of rediscovery ⚘

Hoover’s Cryptantha: A Ghost from California’s Botanical Past

Sometimes in the world of native plants, we encounter species that tell stories of loss and remind us why conservation matters. Meet Hoover’s cryptantha (Cryptantha hooveri), a small annual wildflower that once graced the landscapes of California but now exists only in our botanical memories and pressed herbarium specimens.

What is Hoover’s Cryptantha?

Hoover’s cryptantha belongs to the forget-me-not family and was once a charming little annual forb—that’s botanist-speak for a non-woody flowering plant. Like other members of its genus, it likely produced clusters of tiny white flowers that would have been a delicate addition to California’s diverse wildflower tapestry.

As an annual plant, Hoover’s cryptantha completed its entire life cycle in a single growing season, sprouting from seed, flowering, setting seed, and dying all within one year. This growth pattern made it particularly vulnerable to environmental changes and habitat disruption.

Where Did It Call Home?

This rare beauty was endemic to California, meaning it existed nowhere else on Earth. The species was native to the lower 48 states, specifically found only within California’s borders, making it a true Golden State original.

The Reality Check: Why You Can’t (and Shouldn’t Try to) Grow It

Here’s where this story takes a sobering turn. Hoover’s cryptantha carries a Global Conservation Status of SH, which stands for Possibly Extirpated. In plain English, this means the species is known only from historical records and may no longer exist in the wild. While scientists hold onto hope for rediscovery, no populations have been confirmed in recent years.

This conservation status means:

  • Seeds or plants are not available through any legitimate sources
  • The species may be functionally extinct
  • Any claims of having this plant should be viewed with extreme skepticism
  • Conservation efforts focus on habitat protection in case populations are rediscovered

What This Means for Gardeners

As much as we’d love to provide growing tips for this fascinating species, the reality is that Hoover’s cryptantha represents something more important than a garden addition—it’s a reminder of what we can lose when habitats disappear.

Instead of trying to grow this possibly extinct species, consider these actions:

  • Support California native plant conservation organizations
  • Choose other California native annuals for your garden
  • Learn about habitat preservation in your area
  • Spread awareness about rare and endangered plants

Honoring the Memory: Alternative Native Choices

While we can’t grow Hoover’s cryptantha, we can honor its memory by growing other California native plants that support local ecosystems. Consider exploring other Cryptantha species that are still thriving, or choose from California’s incredible diversity of native wildflowers that can bring beauty to your garden while supporting local wildlife.

Every rare plant tells a story about the importance of protecting native habitats. Hoover’s cryptantha may be gone, but its legacy can inspire us to better protect the native plants that remain. Sometimes the most important lesson a plant can teach us is what happens when we don’t act soon enough to preserve the wild places that sustain them.

Hoover’s Cryptantha

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

Lamiales

Family

Boraginaceae Juss. - Borage family

Genus

Cryptantha Lehm. ex G. Don - cryptantha

Species

Cryptantha hooveri I.M. Johnst. - Hoover's cryptantha

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