North America Native Plant

Thicksepal Cryptantha

Botanical name: Cryptantha crassisepala var. elachantha

USDA symbol: CRCRE

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Thicksepal Cryptantha: A Delicate Native Annual for Low-Maintenance Gardens If you’re looking for a native plant that won’t demand much attention but still adds subtle charm to your garden, thicksepal cryptantha (Cryptantha crassisepala var. elachantha) might just be the unsung hero you never knew you needed. This petite annual belongs ...

Thicksepal Cryptantha: A Delicate Native Annual for Low-Maintenance Gardens

If you’re looking for a native plant that won’t demand much attention but still adds subtle charm to your garden, thicksepal cryptantha (Cryptantha crassisepala var. elachantha) might just be the unsung hero you never knew you needed. This petite annual belongs to the borage family and represents the kind of understated beauty that makes native gardening so rewarding.

Where You’ll Find This Native Gem

Thicksepal cryptantha is a true native of the American Southwest and south-central regions. You can find this hardy little plant growing naturally across seven states: Arizona, Colorado, Kansas, New Mexico, Oklahoma, Texas, and Utah. It’s perfectly adapted to the challenging conditions of these regions, making it an excellent choice for gardeners who want to work with nature rather than against it.

What Makes Thicksepal Cryptantha Special

As an annual forb, thicksepal cryptantha completes its entire life cycle in one growing season. Don’t let its modest size fool you – this plant packs plenty of character into its small frame. Like other members of the Cryptantha genus, it produces delicate clusters of tiny white flowers that add a gentle touch to any naturalized garden setting.

The term forb simply means it’s a flowering plant that doesn’t develop woody stems like shrubs or trees. Instead, it stays soft and herbaceous throughout its life, with all its energy focused on producing those charming little blooms.

Why Consider Growing Thicksepal Cryptantha

Here are some compelling reasons to include this native annual in your landscape:

  • True native credentials – Supporting local ecosystems by growing plants that naturally belong in your region
  • Low maintenance – Once established, native plants typically require minimal care
  • Drought tolerance – Adapted to survive in challenging conditions with minimal water
  • Wildlife support – Native plants provide food and habitat for local wildlife and pollinators
  • Natural reseeding – As an annual, it may self-sow for future seasons

Best Garden Settings for Thicksepal Cryptantha

This native annual shines in specific garden styles and conditions:

  • Wildflower meadows and prairies
  • Xeriscaped gardens and water-wise landscapes
  • Native plant gardens
  • Naturalized areas where a wild look is desired
  • Rock gardens and areas with well-draining soil

Growing Conditions and Care

While specific growing requirements for this variety are not extensively documented, most Cryptantha species share similar preferences that align with their native habitats:

  • Sunlight: Full sun exposure
  • Soil: Well-draining soil, tolerant of poor soils
  • Water: Low water requirements once established
  • Climate: Adapted to the climate zones of its native range

A Word About Availability

Here’s where things get a bit tricky – thicksepal cryptantha isn’t commonly found in mainstream nurseries. This particular variety represents the specialized end of native plant gardening, where patience and persistence often pay off. You might need to seek out specialized native plant nurseries or participate in native plant society seed exchanges to find this gem.

The Bottom Line

Thicksepal cryptantha represents native gardening at its most authentic – a plant that asks for little but gives back to the ecosystem in meaningful ways. While it may not be the showiest flower in your garden, it offers the satisfaction of growing something that truly belongs in your local landscape.

If you can source seeds or plants responsibly, this annual forb makes an excellent addition to naturalized areas where you want to support native wildlife while maintaining a low-maintenance garden approach. Sometimes the most rewarding garden plants are the ones that whisper rather than shout – and thicksepal cryptantha definitely falls into that category.

Thicksepal 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 crassisepala (Torr. & A. Gray) Greene - thicksepal cryptantha

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