North America Native Plant

Smooth Ticktrefoil

Botanical name: Desmodium laevigatum

USDA symbol: DELA2

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Meibomia laevigata (Nutt.) Kuntze (MELA8)   

Smooth Ticktrefoil: A Native Wildflower That Wildlife (and Maybe Your Socks) Will Love If you’re looking to add a native plant to your garden that practically every creature in your backyard will thank you for, meet smooth ticktrefoil (Desmodium laevigatum). This unassuming perennial might not win any beauty contests, but ...

Rare plant alert!

Region: New Jersey

Status: Highlands Listed, S3: New Jersey Highlands region ⚘ 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 ⚘

Smooth Ticktrefoil: A Native Wildflower That Wildlife (and Maybe Your Socks) Will Love

If you’re looking to add a native plant to your garden that practically every creature in your backyard will thank you for, meet smooth ticktrefoil (Desmodium laevigatum). This unassuming perennial might not win any beauty contests, but it’s an absolute superstar when it comes to supporting local wildlife – even if it has a sneaky habit of hitching rides on your pants!

What Is Smooth Ticktrefoil?

Smooth ticktrefoil is a native perennial forb that belongs to the legume family. As a forb, it’s an herbaceous plant without woody stems – think of it as the middle ground between grasses and shrubs. This modest wildflower grows throughout much of the eastern and southeastern United States, quietly doing its part to keep local ecosystems humming along.

The plant gets its smooth name from its relatively hairless leaves compared to its fuzzy cousins in the Desmodium family. The ticktrefoil part comes from its three-leaflet compound leaves and those notorious seed pods that seem magnetically attracted to fabric and fur.

Where Does It Grow?

Smooth ticktrefoil calls a impressive swath of the United States home, naturally occurring in Alabama, Arkansas, Delaware, District of Columbia, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maryland, Mississippi, Missouri, New Jersey, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, and West Virginia. That’s a lot of states where this little plant has been quietly supporting wildlife for centuries!

However, if you’re gardening in New Jersey, take note: smooth ticktrefoil has a rarity status of Highlands Listed, S3 in the state, meaning it’s uncommon and potentially vulnerable. If you’re in New Jersey and want to grow this plant, make sure you source it responsibly from reputable native plant nurseries rather than collecting from the wild.

Why Your Garden (and Local Wildlife) Needs This Plant

Here’s where smooth ticktrefoil really shines. According to wildlife research, this humble plant provides 10% to 25% of the diet for both large animals and terrestrial birds, and occasionally serves as cover for both groups. That’s a pretty impressive resume for such a modest-looking plant!

The small pink to purple flowers that appear in late summer are magnets for:

  • Native bees
  • Butterflies
  • Other beneficial pollinators

Even after the blooming season ends, the plant continues to provide value through its nutritious seeds, which birds and small mammals eagerly consume.

What Does It Look Like?

Smooth ticktrefoil won’t stop traffic with its looks, but it has its own understated charm. The plant typically grows 2-4 feet tall with an upright, somewhat sprawling habit. Its compound leaves feature three leaflets (hence trefoil), and in late summer, small pink to purple flowers appear in loose clusters along the stems.

The real conversation starter comes after flowering when the distinctive flattened seed pods develop. These segmented pods have tiny hooks that allow them to hitchhike on passing animals (and gardeners!) for seed dispersal. It’s nature’s version of velcro, and while it can be mildly annoying, it’s also pretty ingenious.

Growing Smooth Ticktrefoil: The Easy Route

One of the best things about smooth ticktrefoil is how low-maintenance it is once established. This plant is adapted to USDA hardiness zones 6-9 and thrives in conditions ranging from partial shade to full sun.

Ideal Growing Conditions:

  • Well-drained soils (it’s not picky about soil type)
  • Partial shade to full sun
  • Moderate to dry moisture levels once established
  • USDA zones 6-9

Planting and Care Tips:

  • Start from seed sown in fall for best results
  • Seeds may need cold stratification to germinate well
  • Allow plants to self-seed for natural colonies
  • Minimal watering needed once established
  • No fertilization necessary (it fixes its own nitrogen as a legume!)
  • Cut back in late fall or early spring if desired

Perfect Spots in Your Landscape

Smooth ticktrefoil isn’t a formal garden plant – it’s more of a let’s make this corner look natural and feed some wildlife kind of plant. Consider it for:

  • Native plant gardens and naturalized areas
  • Woodland edges and meadow plantings
  • Pollinator gardens (though plant it toward the back)
  • Wildlife habitat gardens
  • Areas where you want low-maintenance native coverage

Just remember that those seed pods will try to follow you home, so you might want to avoid planting it right next to high-traffic walkways where you’ll constantly be picking pods off your clothes!

The Bottom Line

Smooth ticktrefoil might not be the showiest plant in your garden, but it’s definitely one of the hardest working. If you’re trying to create habitat for native wildlife, support pollinators, or simply add an easy-care native plant to your landscape, this unassuming wildflower delivers in spades.

Just be prepared for those hitchhiking seed pods – they’re actually a sign that you’re growing a plant that’s perfectly adapted to spreading and supporting wildlife in your area. And really, is there anything more satisfying than knowing your garden is making a real difference for local ecosystems, one sticky seed pod at a time?

Smooth Ticktrefoil

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

Desmodium Desv. - ticktrefoil

Species

Desmodium laevigatum (Nutt.) DC. - smooth ticktrefoil

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