North America Native Plant

Macoun’s Cudweed

Botanical name: Pseudognaphalium macounii

USDA symbol: PSMA11

Life cycle: annual

Habit: forb

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

Synonyms: Gnaphalium decurrens Ives, non L. (GNDE)  âš˜  Gnaphalium macounii Greene (GNMA)  âš˜  Pseudognaphalium viscosum auct. non (Kunth) W.A. Weber (PSVI5)   

Macoun’s Cudweed: A Humble Native Worth Getting to Know If you’re looking for a low-maintenance native plant that quietly does its job while supporting local ecosystems, let me introduce you to Macoun’s cudweed (Pseudognaphalium macounii). This unassuming little plant might not win any beauty contests, but it’s got character, resilience, ...

Rare plant alert!

Region: New Jersey

Status: Endangered, Listed Pinelands, Highlands Listed, SH: 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. ⚘

Macoun’s Cudweed: A Humble Native Worth Getting to Know

If you’re looking for a low-maintenance native plant that quietly does its job while supporting local ecosystems, let me introduce you to Macoun’s cudweed (Pseudognaphalium macounii). This unassuming little plant might not win any beauty contests, but it’s got character, resilience, and some serious ecological street cred.

What Exactly Is Macoun’s Cudweed?

Macoun’s cudweed is a native North American forb – basically a non-woody herbaceous plant that can live as either an annual or biennial. Don’t let the weed in its name fool you; this plant earned its place in the native plant community long before European settlers arrived. It’s also known by several scientific synonyms, including Gnaphalium macounii Greene, if you happen to encounter it in older botanical references.

The plant gets its common name from John Macoun, a prominent 19th-century Canadian botanist who extensively catalogued North American flora. So really, you’re growing a piece of botanical history!

Where You’ll Find It Growing Wild

This adaptable native has one of the most impressive natural ranges you’ll encounter. Macoun’s cudweed naturally occurs across a vast swath of North America, thriving in locations from Alberta and British Columbia down to Texas and from coast to coast. You can find it growing wild in states and provinces including Arizona, California, Colorado, Idaho, Maine, Michigan, Minnesota, Montana, New York, Oregon, and many others.

A Word of Caution: Rarity Concerns

Here’s something important to know: while Macoun’s cudweed has a wide distribution, it’s actually endangered in New Jersey, where it holds special protected status in both the Pinelands and Highlands regions. If you’re gardening in areas where this plant is rare, please make sure to source your plants or seeds responsibly from reputable native plant nurseries rather than collecting from wild populations.

What Does It Look Like?

Macoun’s cudweed won’t knock your socks off with flashy blooms, but it has its own quiet charm. The plant produces small clusters of white to yellowish flowers that have a papery, everlasting quality (hence the cudweed name – they were once used for stuffing). The real appeal lies in its silvery-gray, woolly foliage that adds interesting texture to garden spaces.

Why Grow Macoun’s Cudweed?

You might wonder why anyone would deliberately plant something called a cudweed, but hear me out:

  • Native ecosystem support: As a native plant, it provides food and habitat for insects and wildlife that co-evolved with it
  • Pollinator magnet: Those small flowers attract various beneficial insects, small butterflies, and other pollinators
  • Low maintenance: Once established, it’s remarkably drought-tolerant and requires minimal care
  • Naturalization: Perfect for wild gardens, prairie restorations, or areas where you want a natural, un-fussy look
  • Soil tolerance: Thrives in poor soils where other plants struggle

Growing Conditions and Care

The beauty of Macoun’s cudweed lies in its adaptability and low demands:

Sunlight: Prefers full sun but tolerates partial shade
Soil: Adapts to various soil types, including poor, dry soils
Water: Drought-tolerant once established; doesn’t need regular watering
Hardiness: Generally hardy in USDA zones 3-9, depending on your location within its native range

This plant is wonderfully self-sufficient. It often self-seeds, so you might find new plants popping up in suitable spots around your garden – though it’s not aggressive about it.

Best Garden Applications

Macoun’s cudweed shines in:

  • Native plant gardens and prairie restorations
  • Dry gardens and xeriscapes
  • Areas with poor or challenging soil
  • Naturalized areas where you want low-maintenance coverage
  • Pollinator gardens (as a supporting player rather than the star)

Planting and Care Tips

Growing Macoun’s cudweed is refreshingly straightforward:

  • Start from seed in fall or early spring, or plant nursery-grown specimens
  • Space plants about 12-18 inches apart if you want coverage
  • Water until established, then let nature take over
  • No fertilizer needed – it actually prefers lean conditions
  • Allow some plants to go to seed if you want natural reseeding
  • Minimal pruning required; let it follow its natural cycle

The Bottom Line

Macoun’s cudweed might not be the showstopper of your garden, but it’s the reliable friend that quietly makes everything work better. It supports native wildlife, tolerates tough conditions, and asks for almost nothing in return. If you’re building habitat, creating a native plant garden, or just want something genuinely low-maintenance, this humble native deserves a spot in your landscape.

Just remember to source it responsibly, especially if you’re in regions where it’s uncommon. Your local native plant society or extension office can help you find reputable suppliers who propagate rather than wild-collect their plants.

Macoun’s Cudweed

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

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Pseudognaphalium Kirp. - cudweed

Species

Pseudognaphalium macounii (Greene) Kartesz - Macoun's cudweed

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