Native Plants

Longstalk Clover

Trifolium longipes caurinum

USDA symbol: TRLOC

perennial forb

Lower 48 states: native

If you’re passionate about native gardening in the Pacific Northwest, you might want to get acquainted with longstalk clover (Trifolium longipes caurinum). This charming little perennial forb might not be the showiest plant in your garden, but it’s got some serious ecological credentials that make it worth considering for your ...

Longstalk Clover may be listed as rare in your area.
Global Conservation Status

Status: S5T3T4 | Secure: At low or no risk of extinction in the area due to an extensive range, abundant populations, and with little to no concern of declines or threats.

Longstalk Clover: A Pacific Northwest Native Worth Knowing

If you’re passionate about native gardening in the Pacific Northwest, you might want to get acquainted with longstalk clover (Trifolium longipes caurinum). This charming little perennial forb might not be the showiest plant in your garden, but it’s got some serious ecological credentials that make it worth considering for your native landscape.

What Exactly Is Longstalk Clover?

Longstalk clover is a true Pacific Northwest native, calling Oregon and Washington home. As its common name suggests, this little clover produces flowers on notably long stalks, giving it a delicate, airy appearance that sets it apart from its more common clover cousins. Like other members of the legume family, it’s a nitrogen-fixer, which means it’s actually improving your soil while it grows.

Being a perennial forb, longstalk clover doesn’t develop woody stems like shrubs or trees. Instead, it maintains soft, herbaceous growth year after year, with its growing points safely tucked at or below ground level to weather Pacific Northwest winters.

  • Species observed
  • No observations

Why Consider Growing Longstalk Clover?

Here’s where this humble native really shines:

  • Pollinator magnet: Those small white to pinkish flowers are bee candy, attracting native bees and other beneficial insects
  • Soil improvement: As a legume, it fixes nitrogen, naturally fertilizing surrounding plants
  • Native credentials: Supporting local ecosystems by growing truly native plants
  • Low maintenance: Once established, native plants typically require minimal care

Garden Role and Design Ideas

Longstalk clover works beautifully in:

  • Native plant gardens and restoration projects
  • Pollinator gardens where you want to support local bee species
  • Naturalized areas where you’re recreating Pacific Northwest plant communities
  • Ground cover situations where you want something functional yet attractive

It’s not necessarily a specimen plant that’ll stop traffic, but it’s the kind of reliable native that forms the backbone of a healthy, functioning ecosystem.

Growing Conditions and Care

While specific growing requirements for this particular subspecies aren’t well-documented, Pacific Northwest clovers generally prefer:

  • Sunlight: Full sun to partial shade
  • Soil: Well-draining soils (avoid waterlogged conditions)
  • Hardiness: Likely suited for USDA zones 6-9, matching its native range
  • Water: Drought-tolerant once established, typical of many natives

A Word About Sourcing

Here’s something important to know: longstalk clover has a conservation status that suggests it may be less common than other native plants. If you’re interested in growing it, make sure you source seeds or plants responsibly from reputable native plant suppliers who ethically collect or propagate their materials.

The Bottom Line

Longstalk clover might not be the flashiest addition to your garden, but it’s exactly the kind of plant that serious native gardeners appreciate. It supports pollinators, improves soil, and helps recreate the plant communities that belong in the Pacific Northwest. If you’re building a native landscape in Oregon or Washington, this little clover deserves a spot on your consideration list.

Just remember to source it responsibly and give it the well-draining conditions it likely prefers. Sometimes the most valuable garden plants are the quiet ones that do their important work without demanding much attention.

Trifolium longipes caurinum 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. Trifolium longipes caurinum is also known as:

Trifolium caurinum | USDA symbol: TRCA15
Trifolium covillei | USDA symbol: TRCO11
Trifolium longipes var. multiovulatum | USDA symbol: TRLOM2
Trifolium oreganum Howell var. multiovulatum | USDA symbol: TRORM
Trifolium rusbyi Greene ssp. caurinum Heller & | USDA symbol: TRRUC

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: Rosidae
Order: Fabales
Family: Fabaceae Lindl. - Pea family
Genus: Trifolium L. - clover

Species: Trifolium longipes Nutt. - longstalk clover

Subspecies: Trifolium longipes Nutt. ssp. caurinum (Piper) J.M. Gillett - longstalk clover

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