Native Plants

Saber Bogmat

Wolffiella oblonga

USDA symbol: WOOB

perennial forb

Lower 48 states: native

Meet one of North America’s most overlooked native aquatic plants: the saber bogmat (Wolffiella oblonga). This diminutive floating plant is so small you might mistake it for pond scum at first glance, but don’t let its size fool you – this little green marvel packs a punch when it comes ...

Saber Bogmat: The Tiny Native Water Plant You’ve Probably Never Heard Of

Meet one of North America’s most overlooked native aquatic plants: the saber bogmat (Wolffiella oblonga). This diminutive floating plant is so small you might mistake it for pond scum at first glance, but don’t let its size fool you – this little green marvel packs a punch when it comes to aquatic gardening.

What Exactly is Saber Bogmat?

Saber bogmat is a perennial forb that belongs to the duckweed family, and it’s one of the smallest flowering plants on Earth. Unlike typical garden plants, this tiny native doesn’t have roots, stems, or traditional leaves. Instead, it consists of small, elongated green fronds that float gracefully on the water’s surface like miniature lily pads.

This fascinating plant is also known by the synonym Lemna oblonga, though you’re unlikely to find it at your local garden center under any name!

Where Does Saber Bogmat Call Home?

Saber bogmat is native to the lower 48 states, with natural populations found in California, Florida, Louisiana, Mississippi, and Texas. It thrives in the warm, humid conditions of the South and Southwest, making it a true child of American waters.

  • Species observed
  • No observations

Why Consider Saber Bogmat for Your Water Garden?

While saber bogmat might not win any beauty contests, it offers several practical benefits for water gardeners:

  • Natural water purifier: Like other floating plants, it helps absorb excess nutrients from pond water
  • Low maintenance: Once established, it requires virtually no care
  • Native credentials: Supporting local ecosystems by choosing native species
  • Conversation starter: Few gardeners can claim they’re growing one of the world’s smallest flowering plants

Growing Conditions and Care

Saber bogmat is classified as an obligate wetland plant across all regions where it grows, meaning it almost always occurs in wetland environments. Here’s what this tiny plant needs to thrive:

  • Water requirements: Still or very slow-moving freshwater
  • Light needs: Full sun to partial shade
  • Climate: USDA hardiness zones 8-11 (warm climates only)
  • Temperature: Prefers warm water temperatures

Planting and Propagation

The beauty of growing saber bogmat lies in its simplicity. There’s no soil preparation, no digging, and no complicated planting procedures. Simply introduce the plant to your pond or water feature by gently placing it on the water’s surface.

The plant reproduces vegetatively through budding, creating new fronds that eventually separate from the parent plant. In ideal conditions, it can spread relatively quickly across the water’s surface.

Best Uses in the Garden

Saber bogmat works best in:

  • Natural or naturalistic ponds
  • Water gardens focused on native plants
  • Constructed wetlands
  • Aquatic plant collections
  • Educational gardens showcasing unusual native species

Things to Consider Before Planting

While saber bogmat is a fascinating native plant, it’s not for every water garden:

  • Climate limitations: Only suitable for warm climate zones (8-11)
  • Minimal visual impact: Its tiny size means it won’t create dramatic landscape effects
  • Seasonal considerations: May die back in cooler weather
  • Specialized habitat: Requires permanent water features

The Bottom Line

Saber bogmat isn’t going to transform your water garden into a showstopper, but it offers something special for the gardener who appreciates native plants and natural ecosystems. If you have a pond or water feature in the appropriate climate zones and want to add an authentic piece of American aquatic heritage, this tiny floating native deserves consideration.

Just remember: good things sometimes come in very, very small packages – even if you need to look closely to appreciate them!

Wolffiella oblonga is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Wolffiella oblonga is also known as:

Lemna oblonga | USDA symbol: LEOB4

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" — matching plants to their ideal growing conditions, so they'll thrive with less care and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection can be if you don't have the right information. While tags on nursery plants list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. You might be surprised to learn that popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. The table below gives insight into the preferred growing conditions of this plant throughout its geographical distribution.

Region
Preferred Habitat

Arid West (AZ, CA, CO, ID, MT, NV, NM, OR, TX, UT, WA, WY)

Obligate Wetland

Atlantic and Gulf Coastal Plain (AL, AR, DC, DE, FL, GA, IL, KY, LA, MD, MS, MO, NC, NJ, OK, PA, SC, TN, TX, VA)

Obligate Wetland

Great Plains (CO, KS, MN, MT, NE, NM, ND, OK, SD, TX, WY)

Obligate Wetland

Western Mountains, Valleys, and Coast (AZ, CA, CO, ID, MT, NV, NM, OR, SD, UT, WA, WY)

Obligate Wetland
Wetland Glossary
Obligate Wetland
Facultative Wetland
Facultative
Facultative Upland
Obligate Upland
Almost always occurs in wetlands
Usually occurs in wetlands but may occur in non-wetlands
Can occur in wetlands and non-wetlands
Usually occurs in non-wetlands but may occur in wetlands
Almost never occurs in wetlands

Classification

Group: Monocot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Liliopsida - Monocotyledons
Subclass: Arecidae
Order: Arales
Family: Lemnaceae Martinov - Duckweed family
Genus: Wolffiella Hegelm. - bogmat

Species: Wolffiella oblonga (Phil.) Hegelm. - saber bogmat

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