Native Plants

Sessileleaf Scurvygrass

Cochlearia sessilifolia

USDA symbol: COSE8

annual forb

Alaska: native

Meet sessileleaf scurvygrass (Cochlearia sessilifolia), a tough little annual that calls Alaska’s rugged coastlines home. Don’t let the quirky name fool you – this small but mighty native plant has adapted to some of the harshest growing conditions on Earth, making it a fascinating addition for specialized gardens and dedicated ...

Sessileleaf Scurvygrass may be listed as rare in your area.
Global Conservation Status

Status: S1S2Q | Imperiled: Extremely rare. Typically 6 to 20 occurrences or 1,000 to 3,000 remaining individuals.

Sessileleaf Scurvygrass: Alaska’s Hardy Coastal Native

Meet sessileleaf scurvygrass (Cochlearia sessilifolia), a tough little annual that calls Alaska’s rugged coastlines home. Don’t let the quirky name fool you – this small but mighty native plant has adapted to some of the harshest growing conditions on Earth, making it a fascinating addition for specialized gardens and dedicated native plant enthusiasts.

What Makes Sessileleaf Scurvygrass Special

This compact annual forb belongs to the mustard family and showcases the incredible resilience of Alaska’s native flora. As a facultative wetland plant, it typically thrives in wetland conditions but can occasionally pop up in drier spots. The plant produces small clusters of white cruciferous flowers that may look delicate but are perfectly adapted to withstand coastal winds and salt spray.

Where You’ll Find It Growing Wild

Sessileleaf scurvygrass is exclusively native to Alaska, where it grows along coastlines and in salt marshes. This plant has mastered the art of living in saline conditions that would quickly kill most other garden plants.

  • Species observed
  • No observations

Important Conservation Note

Before you get too excited about growing this unique native, there’s something important to know: sessileleaf scurvygrass has a Global Conservation Status of S1S2Q, indicating it’s quite rare and possibly vulnerable. If you’re determined to grow this plant, please only source it from reputable native plant nurseries that propagate from ethically collected seeds – never harvest from wild populations.

Growing Sessileleaf Scurvygrass Successfully

Let’s be honest – this isn’t a plant for everyone or every garden. Sessileleaf scurvygrass has very specific needs that make it challenging to grow outside its natural habitat:

  • Climate requirements: Extremely cold hardy (USDA zones 1-4), thrives in cool, coastal conditions
  • Soil needs: Prefers saline or salt-tolerant conditions – regular garden soil won’t cut it
  • Moisture: Needs consistent moisture, typical of wetland environments
  • Light: Adapted to the long days and low sun angles of northern latitudes

Is This Plant Right for Your Garden?

Sessileleaf scurvygrass is best suited for:

  • Specialized coastal gardens in Alaska
  • Native plant collections focusing on rare species
  • Salt-tolerant landscaping projects
  • Educational gardens showcasing Arctic/subarctic flora

This annual completes its entire life cycle in one growing season, so you’ll need to allow for natural reseeding or collect seeds for next year’s planting.

Wildlife and Ecological Benefits

While small, the flowers of sessileleaf scurvygrass provide nectar for various small pollinators adapted to Alaska’s coastal environments. As part of the coastal ecosystem, it helps stabilize soil and provides habitat for specialized insects and other small creatures.

The Bottom Line

Sessileleaf scurvygrass is definitely a plant for the dedicated native plant enthusiast rather than the casual gardener. Its rarity means it should only be grown with responsibly sourced material, and its specific growing requirements make it challenging to cultivate successfully outside Alaska’s coastal regions. However, for those passionate about preserving and growing Alaska’s unique native flora, this little plant offers a chance to connect with one of the state’s most specialized coastal species.

If you’re looking for easier-to-grow native alternatives that offer similar ecological benefits, consider exploring other members of the mustard family that are better suited to your local conditions and more readily available from native plant sources.

Cochlearia sessilifolia is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Cochlearia sessilifolia is also known as:

Cochlearia officinalis var. sessilifolia | USDA symbol: COOFS

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Dilleniidae
Order: Capparales
Family: Brassicaceae Burnett - Mustard family
Genus: Cochlearia L. - scurvygrass

Species: Cochlearia sessilifolia Rollins - sessileleaf scurvygrass

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