North America Native Plant

Stiff Yellow Flax

Botanical name: Linum medium var. medium

USDA symbol: LIMEM

Life cycle: annual

Habit: forb

Native status: Native to Canada âš˜ Native to the lower 48 states  

Synonyms: Cathartolinum medium (Planch.) Small (CAME26)  âš˜  Linum striatum Walter var. medium (Planch.) B. Boivin (LISTM)  âš˜  Linum virginianum L. var. medium Planch. (LIVIM)   

Stiff Yellow Flax: A Rare Native Wildflower Worth Discovering If you’re looking to add some uncommon native charm to your garden, stiff yellow flax (Linum medium var. medium) might just be the hidden gem you’ve been searching for. This delicate wildflower is one of those quiet beauties that doesn’t shout ...

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. ⚘

Stiff Yellow Flax: A Rare Native Wildflower Worth Discovering

If you’re looking to add some uncommon native charm to your garden, stiff yellow flax (Linum medium var. medium) might just be the hidden gem you’ve been searching for. This delicate wildflower is one of those quiet beauties that doesn’t shout for attention but rewards those who take the time to appreciate its subtle appeal.

What Makes Stiff Yellow Flax Special?

Stiff yellow flax is a native North American wildflower that belongs to the flax family. As its common name suggests, this plant produces cheerful yellow blooms and has a somewhat rigid growth habit that sets it apart from its more flexible relatives. This herbaceous perennial (though it can sometimes behave as an annual) is classified as a forb, meaning it’s a non-woody flowering plant that dies back to the ground each winter.

Where Does It Call Home?

This native beauty has a fairly limited natural range, making it a special find for native plant enthusiasts. You’ll find stiff yellow flax growing naturally in just a few areas across northeastern North America, including Ontario, New York, and Pennsylvania. Its restricted distribution makes it somewhat of a botanical treasure in the regions where it does occur.

A Word of Caution: Rarity Matters

Before you rush out to find this plant, there’s something important you should know. Stiff yellow flax has a Global Conservation Status of S5T3T4, which indicates some level of conservation concern. This means that while you can certainly grow this lovely native, it’s crucial to source your plants or seeds responsibly. Always purchase from reputable native plant nurseries that propagate their stock rather than wild-collecting, and never harvest from wild populations yourself.

Garden Appeal and Design Role

While stiff yellow flax might not be the showiest plant in your garden, it has its own quiet charm. The small yellow flowers create a delicate, airy texture that works beautifully in naturalized areas and native plant gardens. Its upright, somewhat rigid stems give it structure that can add interesting vertical elements to wildflower meadows or prairie-style plantings.

This plant is particularly well-suited for:

  • Native plant gardens
  • Wildflower meadows
  • Naturalized landscapes
  • Prairie-style gardens
  • Areas where you want to support local ecosystems

Growing Conditions and Care

Like many native plants, stiff yellow flax isn’t particularly fussy once established, though specific growing requirements for this variety are not well-documented. Based on its native habitat and related species, it likely prefers well-draining soils and can tolerate a range of light conditions from full sun to partial shade.

Given its native range in the northeastern regions, this plant should be hardy in USDA zones 3-7, making it suitable for gardeners in cooler climates who are looking for native options.

Wildlife and Pollinator Benefits

While specific wildlife benefits for this particular variety aren’t well-documented, native flax species generally support local ecosystems by providing nectar for small pollinators and seeds for birds. By choosing native plants like stiff yellow flax, you’re contributing to the health of your local ecosystem and supporting the wildlife that has evolved alongside these plants.

Should You Plant Stiff Yellow Flax?

If you’re passionate about native plants and have access to responsibly sourced stiff yellow flax, it can be a wonderful addition to your garden. However, due to its apparent rarity and limited availability, you might also want to consider other native flax species or similar native wildflowers that are more readily available and don’t carry conservation concerns.

The key is to always source your plants ethically and never collect from wild populations. If you do decide to grow this special native, you’ll be helping to preserve genetic diversity and potentially supporting conservation efforts for this uncommon wildflower.

The Bottom Line

Stiff yellow flax represents the kind of native plant that reminds us there’s still so much to discover in our local flora. While it may not be the easiest native plant to find or the most dramatic in your garden, it offers the satisfaction of growing something truly special – a piece of your region’s natural heritage that deserves our appreciation and protection.

Stiff Yellow Flax

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

Linales

Family

Linaceae DC. ex Perleb - Flax family

Genus

Linum L. - flax

Species

Linum medium (Planch.) Britton - stiff yellow flax

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