North America Native Plant

Longstalk Clover

Botanical name: Trifolium longipes pedunculatum

USDA symbol: TRLOP

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Trifolium longipes Nutt. var. pedunculatum (Rydb.) C.L. Hitchc. (TRLOP3)  âš˜  Trifolium longipes Nutt. var. pedunculatum (Rydb.) Isely (TRLOP5)  âš˜  Trifolium pedunculatum Rydb. (TRPE15)   

Longstalk Clover: A Rare Idaho Native Worth Knowing Meet Trifolium longipes pedunculatum, better known as longstalk clover – a little-known native wildflower that calls Idaho home. If you’re a gardener who loves rare plants and supporting local ecosystems, this perennial forb might catch your interest, though it comes with some ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3T4: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals. ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Longstalk Clover: A Rare Idaho Native Worth Knowing

Meet Trifolium longipes pedunculatum, better known as longstalk clover – a little-known native wildflower that calls Idaho home. If you’re a gardener who loves rare plants and supporting local ecosystems, this perennial forb might catch your interest, though it comes with some important considerations.

What Makes This Clover Special?

Longstalk clover is a true Idaho native, belonging to the legume family that includes peas, beans, and other clovers. As a perennial forb, it’s an herbaceous plant that dies back to the ground each winter but returns year after year from its root system. Unlike woody shrubs or trees, this clover lacks significant woody growth and keeps its growing points at or below ground level – a smart strategy for surviving harsh winters.

Where You’ll Find It Growing Wild

This particular variety of longstalk clover has an extremely limited native range, found only in Idaho. This makes it quite special from a conservation standpoint, but also means it’s perfectly adapted to Idaho’s unique growing conditions.

A Word About Rarity

Here’s where things get interesting – and important. Longstalk clover has a conservation status that suggests it’s not particularly common in the wild. This rarity status means we need to be thoughtful about how we approach growing it in our gardens.

If you’re interested in growing this plant, please only source it from reputable native plant nurseries that propagate their stock responsibly. Never collect seeds or plants from wild populations, as this can harm already limited natural communities.

The Growing Challenge

Here’s the honest truth: specific growing information for this particular variety of longstalk clover is quite limited. What we do know is that as an Idaho native, it’s likely adapted to:

  • Cold winters and variable precipitation
  • Well-draining soils
  • Full to partial sun conditions
  • The specific elevation and climate zones where it naturally occurs in Idaho

Should You Grow It?

This is a plant for the true native plant enthusiast rather than the casual gardener. Consider longstalk clover if you:

  • Live in Idaho and want to support truly local flora
  • Are passionate about rare plant conservation
  • Have experience growing challenging native species
  • Can source plants or seeds from responsible suppliers

However, you might want to skip this one if you’re looking for a reliable, well-documented garden performer with known care requirements.

Supporting Pollinators and Wildlife

While specific pollinator relationships for this variety aren’t well-documented, clovers in general are fantastic for supporting bees, butterflies, and other beneficial insects. As a legume, it also helps fix nitrogen in the soil, potentially benefiting neighboring plants.

The Bottom Line

Trifolium longipes pedunculatum represents the fascinating world of rare native plants that exist right under our noses. While it may not be the easiest garden addition, it offers Idaho gardeners a unique opportunity to grow something truly special – a plant found nowhere else in the world.

If you decide to try growing longstalk clover, approach it as a conservation project rather than a typical garden addition. Work with local native plant societies, university extension offices, or specialized nurseries who can provide guidance on responsible cultivation of this rare Idaho treasure.

Remember: sometimes the most rewarding garden plants aren’t the showiest ones, but the quiet natives that connect us more deeply to the unique places we call home.

Longstalk Clover

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Trifolium L. - clover

Species

Trifolium longipes Nutt. - 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