North America Native Plant

Yellowfruit Horse-gentian

Botanical name: Triosteum angustifolium

USDA symbol: TRAN3

Life cycle: perennial

Habit: forb

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

Synonyms: Triosteum angustifolium L. var. eamesii Wiegand (TRANE)   

Yellowfruit Horse-Gentian: A Hidden Gem for Woodland Gardens If you’re looking for a native plant that’s a little off the beaten path, yellowfruit horse-gentian (Triosteum angustifolium) might just be your next woodland treasure. This perennial forb may not win any beauty contests, but it brings understated charm and ecological value ...

Rare plant alert!

Region: New Jersey

Status: S1: Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ New Jersey Highlands region ⚘ New Jersey Pinelands region ⚘ Possibly Extinct: Known only from historical occurrences. Still some hope of rediscovery ⚘ Endangered: In danger of extinction throughout all or a significant portion of its range. ⚘

Region: New Jersey

Yellowfruit Horse-Gentian: A Hidden Gem for Woodland Gardens

If you’re looking for a native plant that’s a little off the beaten path, yellowfruit horse-gentian (Triosteum angustifolium) might just be your next woodland treasure. This perennial forb may not win any beauty contests, but it brings understated charm and ecological value to naturalized gardens across much of eastern North America.

What Is Yellowfruit Horse-Gentian?

Yellowfruit horse-gentian is a native North American perennial that belongs to the group of plants we call forbs – essentially, non-woody flowering plants that lack the thick stems of shrubs or trees. This quiet woodland dweller produces small, inconspicuous yellowish-white to greenish flowers in late spring and early summer, followed by distinctive orange-red to yellow fruits that give the plant its common name.

The plant’s neat, opposite leaves create an orderly appearance that fits well into structured woodland plantings, though it’s definitely more valued for its ecological contributions than its showstopping looks.

Where Does It Grow Naturally?

This native beauty calls both Canada and the lower 48 states home, with a range that spans much of eastern and central North America. You’ll find it growing naturally in states from Alabama and Arkansas up to New York and across to Kansas and Texas, including Alabama, Arkansas, Connecticut, Delaware, District of Columbia, Georgia, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maryland, Mississippi, Missouri, New Jersey, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Rhode Island, Tennessee, Texas, Virginia, West Virginia, and Ontario, Canada.

A Word About Rarity

Before you rush to plant yellowfruit horse-gentian, there’s something important to know: this plant is quite rare in some parts of its range. In Alabama, it carries a rarity status of S1, meaning it’s critically imperiled in the state. In New Jersey, it’s listed as endangered and receives special protection in both the Pinelands and Highlands regions.

If you live in these areas and want to grow this plant, please only source it from responsible nurseries that propagate their own stock rather than collecting from wild populations. Better yet, consider whether your garden might benefit from other native alternatives that aren’t facing population pressures.

Growing Conditions and Care

The good news is that yellowfruit horse-gentian is relatively easy to grow once you understand its preferences. Here’s what this woodland native needs to thrive:

  • Light: Partial shade to full shade – it’s happiest under a woodland canopy
  • Soil: Well-drained soils of various types, including clay and sandy conditions
  • Moisture: Consistent moisture is ideal, but it can handle some drought once established
  • Climate zones: Hardy in USDA zones 4-8

Planting and Care Tips

This is definitely a low-maintenance plant once it gets established. Here are some tips for success:

  • Plant in spring after the last frost danger has passed
  • Mulch with leaf litter to mimic its natural woodland habitat
  • Water regularly the first year, then let natural rainfall take over
  • Don’t worry about fertilizing – it’s adapted to modest soil conditions
  • Be patient – like many native perennials, it may take a year or two to really settle in

Wetland Tolerance

One interesting thing about yellowfruit horse-gentian is how its wetland tolerance varies by region. In the Atlantic and Gulf Coastal Plain, it’s considered an obligate upland plant, meaning it almost never occurs in wetlands. However, in other regions like the Eastern Mountains and Piedmont, Great Plains, Midwest, and Northcentral & Northeast areas, it’s more flexible and can handle both wetland and non-wetland conditions.

Wildlife and Pollinator Benefits

While yellowfruit horse-gentian isn’t a major pollinator magnet, its small flowers do attract native bees and flies during its blooming period. The colorful fruits may also provide food for wildlife, though specific wildlife benefits aren’t well-documented for this species.

Is This Plant Right for Your Garden?

Yellowfruit horse-gentian is perfect for gardeners who:

  • Want to support native plant diversity
  • Have woodland or naturalized garden areas
  • Appreciate subtle beauty over flashy displays
  • Are working on habitat restoration projects
  • Enjoy collecting uncommon native species

It might not be the best choice if you’re looking for a showstopping centerpiece or need plants for sunny, formal garden beds.

The Bottom Line

Yellowfruit horse-gentian represents the quieter side of native gardening – it’s not flashy, but it’s authentic, well-adapted, and adds ecological value to woodland gardens. If you can source it responsibly and have the right growing conditions, this understated native makes a worthy addition to any collection focused on regional plant diversity.

Just remember to respect its rarity status in certain regions, and always choose nursery-propagated plants over wild-collected specimens. Happy gardening!

Yellowfruit Horse-gentian

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

Dipsacales

Family

Caprifoliaceae Juss. - Honeysuckle family

Genus

Triosteum L. - horse-gentian

Species

Triosteum angustifolium L. - yellowfruit horse-gentian

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