North America Native Plant

Downy Carrionflower

Botanical name: Smilax pulverulenta

USDA symbol: SMPU2

Life cycle: perennial

Habit: vine

Native status: Native to the lower 48 states  

Synonyms: Nemexia pulverulenta (Michx.) Small (NEPU4)  âš˜  Smilax herbacea L. var. pulverulenta (Michx.) A. Gray (SMHEP2)   

Downy Carrionflower: A Native Ground Cover with Character If you’re looking for a native ground cover that’s a little different from the usual suspects, meet the downy carrionflower (Smilax pulverulenta). This unassuming perennial herb might not win any beauty contests, but it brings its own unique charm to woodland gardens ...

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 ⚘

Downy Carrionflower: A Native Ground Cover with Character

If you’re looking for a native ground cover that’s a little different from the usual suspects, meet the downy carrionflower (Smilax pulverulenta). This unassuming perennial herb might not win any beauty contests, but it brings its own unique charm to woodland gardens and naturalized landscapes across much of eastern North America.

What Makes Downy Carrionflower Special

Don’t let the name fool you – while it’s called carrionflower, this plant doesn’t actually smell bad like some of its relatives. The downy part of its name comes from the soft, powdery coating on the undersides of its heart-shaped leaves, which gives them a distinctive silvery appearance when the wind catches them just right.

As a member of the Smilax family, downy carrionflower is technically a forb or herb – meaning it’s a vascular plant without significant woody tissue. It grows as a low, trailing or climbing vine that spreads along the ground or climbs over low vegetation using small tendrils.

Where It Grows Naturally

Downy carrionflower is native to a impressive swath of the eastern United States, calling home to 25 states from Minnesota and Michigan in the north down to Mississippi and Georgia in the south, and from Kansas in the west to the Atlantic coast. You’ll find it growing naturally in states including Alabama, Arkansas, Delaware, Georgia, Illinois, Indiana, Kansas, Kentucky, Maryland, Michigan, Minnesota, Mississippi, Missouri, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Virginia, and West Virginia, plus the District of Columbia.

A Note About Rarity

While downy carrionflower has a broad native range, it’s worth noting that in some areas like New Jersey, it has a rarity status and is considered uncommon. If you’re interested in adding this plant to your garden, make sure to source it responsibly from reputable native plant nurseries rather than collecting it from the wild.

Garden Appeal and Landscape Role

Let’s be honest – downy carrionflower isn’t going to be the star of your flower border. Its small, greenish flowers are pretty inconspicuous, blooming in late spring to early summer. But what it lacks in showy blooms, it makes up for in other ways:

  • The heart-shaped leaves with their silvery undersides add textural interest
  • Dark blue-black berries appear in late summer and fall, providing food for wildlife
  • It’s excellent for filling in challenging spots in woodland gardens
  • Works well as a ground cover in naturalized areas
  • Adds to the biodiversity of native plant gardens

Growing Conditions and Care

One of the best things about downy carrionflower is that it’s pretty easygoing once established. Here’s what it prefers:

  • Light: Partial shade to full shade – it’s adapted to woodland understory conditions
  • Soil: Adaptable to various soil types, from moist to moderately dry
  • Moisture: Facultative upland in most regions, meaning it usually prefers drier sites but can handle some moisture
  • Hardiness: Generally hardy in USDA zones 4-9, covering most of its native range

The plant spreads via underground rhizomes, so give it room to roam – or be prepared to manage its spread if you want to keep it contained. In ideal conditions, it can be somewhat aggressive, so consider this when planning your garden layout.

Wildlife and Pollinator Benefits

While the flowers might not catch your eye, they do attract small pollinators including various flies and beetles. The berries that follow are appreciated by birds and small mammals, making this plant a valuable addition to wildlife habitat gardens.

Best Uses in the Landscape

Downy carrionflower shines in:

  • Woodland gardens as understory ground cover
  • Naturalized areas where you want authentic native plant communities
  • Wildlife habitat gardens
  • Challenging shady spots where other plants struggle
  • Native plant restoration projects

The Bottom Line

Downy carrionflower might not be the flashiest native plant you can choose, but it’s a reliable, low-maintenance option for gardeners who want to support local ecosystems while filling in those tricky woodland spots. Just remember to source it responsibly, give it appropriate space to spread, and appreciate it for what it is – a humble but important piece of eastern North America’s natural heritage.

If you’re building a native plant garden or working on habitat restoration, downy carrionflower deserves a spot on your consideration list. Sometimes the most valuable garden plants are the ones that work quietly behind the scenes, and this unassuming native definitely fits that bill.

Downy Carrionflower

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Liliidae

Order

Liliales

Family

Smilacaceae Vent. - Catbrier family

Genus

Smilax L. - greenbrier

Species

Smilax pulverulenta Michx. - downy carrionflower

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