North America Native Plant

Mohr’s Barbara’s Buttons

Botanical name: Marshallia mohrii

USDA symbol: MAMO3

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Mohr’s Barbara’s Buttons: A Rare Southeastern Treasure Worth Protecting Meet Mohr’s Barbara’s buttons (Marshallia mohrii), a charming yet vulnerable native wildflower that deserves a special place in conservation-minded gardens. This delicate perennial might not be the showiest plant in your garden, but its quiet beauty and ecological importance make it ...

Rare plant alert!

Region: United States

Status: S3: Status is uncertain but is somewhere between the following rankings: 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 ⚘ 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 ⚘ Threatened: Experiencing significant population decline or habitat loss that could lead to its endangerment if not addressed. ⚘

Region: United States

Region: United States

Mohr’s Barbara’s Buttons: A Rare Southeastern Treasure Worth Protecting

Meet Mohr’s Barbara’s buttons (Marshallia mohrii), a charming yet vulnerable native wildflower that deserves a special place in conservation-minded gardens. This delicate perennial might not be the showiest plant in your garden, but its quiet beauty and ecological importance make it a true treasure for those dedicated to preserving our native flora.

What Makes This Plant Special

Mohr’s Barbara’s buttons is a native forb – essentially a non-woody perennial that dies back to the ground each winter and returns fresh each spring. This modest plant produces clusters of small, daisy-like flowers that range from pristine white to soft pale pink, creating flat-topped displays that seem to float above narrow, linear leaves. The blooms typically appear from spring through early summer, offering a subtle but elegant addition to any native plant collection.

Where You’ll Find It Growing Wild

This southeastern specialty calls Alabama, Florida, Georgia, and North Carolina home, thriving in the region’s unique wetland ecosystems. You won’t find Mohr’s Barbara’s buttons growing wild anywhere else in the world – it’s exclusively ours to cherish and protect.

A Plant That Needs Our Help

Important Conservation Note: Before you get too excited about adding this beauty to your garden, there’s something crucial you need to know. Mohr’s Barbara’s buttons is considered vulnerable to extinction, with a global conservation status that puts it at risk. It’s even listed as Threatened in the United States. This means if you choose to grow it, you must source your plants responsibly from reputable native plant nurseries that propagate from legally obtained seed or cuttings – never dig plants from the wild.

Perfect Spots for Planting

If you can source this rare gem ethically, Mohr’s Barbara’s buttons works beautifully in:

  • Native wildflower gardens
  • Rain gardens and bioswales
  • Naturalized landscape areas
  • Conservation plantings
  • Wetland restoration projects

Growing Conditions That Make It Happy

This wetland-loving plant has specific preferences that mirror its natural habitat:

  • Moisture: Prefers consistently moist to wet soils and can handle seasonal flooding
  • Light: Thrives in partial shade to full sun
  • Climate: Hardy in USDA zones 8-9
  • Soil: Adapts to various soil types as long as moisture needs are met

Planting and Care Made Simple

Once you’ve secured responsibly sourced plants, caring for Mohr’s Barbara’s buttons is refreshingly straightforward:

  • Plant in spring when the soil is workable
  • Ensure consistent moisture – this isn’t a drought-tolerant plant
  • Mulch lightly to retain soil moisture
  • Minimal maintenance required once established
  • Allow plants to go dormant naturally in winter

Benefits for Wildlife

While small in stature, Mohr’s Barbara’s buttons punches above its weight when it comes to supporting local wildlife. The nectar-rich flowers attract native bees, butterflies, and other beneficial pollinators, making it a valuable addition to any wildlife-friendly garden. Every plant you grow helps support the native ecosystem and provides critical habitat for creatures that have evolved alongside this species.

Should You Grow It?

The answer is a cautious yes – but only if you can source it responsibly. By growing Mohr’s Barbara’s buttons in your garden, you’re participating in important conservation efforts and helping ensure this vulnerable species survives for future generations. Just remember that with great beauty comes great responsibility. This isn’t a plant to collect casually; it’s one to grow with purpose and respect for its precarious status in the wild.

Consider Mohr’s Barbara’s buttons not just as a garden plant, but as a living piece of southeastern natural heritage that you have the privilege of helping preserve. In a world where so many native plants are disappearing, every responsibly grown specimen becomes an ark for the future.

Mohr’s Barbara’s Buttons

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

Marshallia Schreb. - Barbara's buttons

Species

Marshallia mohrii Beadle & F.E. Boynt. - Mohr's Barbara's buttons

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