North America Native Plant

Nuttall’s Mudflower

Botanical name: Micranthemum micranthemoides

USDA symbol: MIMI6

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Hemianthus micranthemoides Nutt. (HEMI4)   

Nuttall’s Mudflower: A Rare Native Wetland Gem on the Brink Meet Nuttall’s mudflower (Micranthemum micranthemoides), a tiny native annual that’s become one of our most elusive botanical treasures. This delicate wetland plant has a story that’s equal parts fascinating and heartbreaking – it’s quite possibly disappeared from the wild entirely, ...

Rare plant alert!

Region: New Jersey

Status: SH: Possibly Extinct: Known only from historical occurrences. Still some hope of rediscovery ⚘ 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

Nuttall’s Mudflower: A Rare Native Wetland Gem on the Brink

Meet Nuttall’s mudflower (Micranthemum micranthemoides), a tiny native annual that’s become one of our most elusive botanical treasures. This delicate wetland plant has a story that’s equal parts fascinating and heartbreaking – it’s quite possibly disappeared from the wild entirely, earning it the sobering conservation status of possibly extirpated.

What Makes This Plant Special

Nuttall’s mudflower is a small forb – essentially a non-woody flowering plant – that once graced the muddy shores and tidal freshwater areas of the Mid-Atlantic coast. As an annual plant, it completes its entire life cycle in just one growing season, making it particularly vulnerable to habitat disruption.

This little plant was historically found across a surprisingly small range, including Delaware, District of Columbia, Maryland, New Jersey, New York, Pennsylvania, and Virginia. However, don’t get your hopes up about spotting it in the wild – it’s been decades since reliable sightings have been reported in most of these areas.

A Plant in Crisis

Important Conservation Alert: Nuttall’s mudflower has a Global Conservation Status of SH, meaning it’s possibly extirpated and known only from historical records. In New Jersey, it’s listed as Endangered and appears on both Pinelands and Highlands protected species lists. This isn’t a plant you’ll find at your local nursery, and for good reason.

Why This Matters for Gardeners

While you almost certainly won’t be growing Nuttall’s mudflower in your backyard, understanding its story is crucial for several reasons:

  • It highlights the importance of wetland conservation
  • It demonstrates how habitat loss affects even the smallest native species
  • It shows why choosing native plants for your garden really matters

The Wetland Connection

This plant has an obligate wetland status across all regions where it historically grew, meaning it almost always occurs in wetlands. Nuttall’s mudflower needed consistently saturated soils – think muddy pond edges, tidal freshwater marshes, and similar soggy spots that have become increasingly rare in our developed landscape.

What Gardeners Can Do Instead

Since Nuttall’s mudflower is essentially unavailable and possibly extinct, consider these native wetland alternatives that can provide similar ecological benefits:

  • Other native Micranthemum species (if available in your region)
  • Native sedges and rushes for wetland areas
  • Regional native plants suited for rain gardens and bog plantings

The Bigger Picture

The story of Nuttall’s mudflower serves as a powerful reminder of what we stand to lose when wetland habitats disappear. While this particular plant may be beyond our help as gardeners, we can honor its memory by:

  • Creating native plant gardens that support local ecosystems
  • Protecting and restoring wetland areas
  • Choosing regionally appropriate native species for our landscapes
  • Supporting conservation organizations working to protect rare plants

Every native plant we grow in our gardens is a small act of conservation. While we may never again see Nuttall’s mudflower blooming in the wild, we can ensure that other native species don’t follow the same path by making thoughtful choices in our own green spaces.

A Note for Researchers and Conservationists

If you’re involved in wetland restoration or botanical research, keep an eye out for this species. Sometimes plants thought to be extinct are rediscovered in overlooked habitats. Any potential sightings should be reported to local botanical authorities immediately, as rediscovery would be cause for celebration and urgent conservation action.

The tale of Nuttall’s mudflower may seem sad, but it’s also a call to action. By understanding what we’ve lost, we can better protect what remains and make choices that support the native plants still thriving in our regions.

Nuttall’s Mudflower

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

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Micranthemum Michx. - mudflower

Species

Micranthemum micranthemoides (Nutt.) Wettst. - Nuttall's mudflower

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