North America Native Plant

Chapman’s Quillwort

Botanical name: Isoetes flaccida var. chapmanii

USDA symbol: ISFLC

Life cycle: perennial

Habit: grass

Native status: Native to the lower 48 states  

Chapman’s Quillwort: A Rare Aquatic Native Worth Knowing If you’ve never heard of Chapman’s quillwort (Isoetes flaccida var. chapmanii), you’re not alone! This fascinating little aquatic plant is one of nature’s more mysterious characters – part living fossil, part specialized wetland dweller, and entirely unique in the world of native ...

Rare plant alert!

Region: Conservation status by state

Status: S3T1T3Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ Subspecies or variety is critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘ 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 ⚘ Subspecies or variety is 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. ⚘

Chapman’s Quillwort: A Rare Aquatic Native Worth Knowing

If you’ve never heard of Chapman’s quillwort (Isoetes flaccida var. chapmanii), you’re not alone! This fascinating little aquatic plant is one of nature’s more mysterious characters – part living fossil, part specialized wetland dweller, and entirely unique in the world of native gardening.

What Exactly Is Chapman’s Quillwort?

Don’t let the name fool you – Chapman’s quillwort isn’t actually related to grasses, despite its grass-like appearance. This perennial belongs to an ancient group of plants called quillworts that have been around since before dinosaurs walked the earth. Think of them as the botanical equivalent of a living time capsule!

Chapman’s quillwort produces thin, quill-like leaves that emerge from an underground stem, creating small tufts that look somewhat like underwater grass. But here’s the cool part: instead of flowers and seeds like most plants we’re familiar with, quillworts reproduce using spores, much like ferns do.

Where You’ll Find This Native Treasure

This special variety of quillwort calls the southeastern United States home, specifically Florida and Georgia. It’s a true native to these regions, having evolved alongside the local ecosystems for thousands of years.

A Word of Caution: Rarity Matters

Here’s where things get serious for a moment. Chapman’s quillwort has a conservation status that suggests it may be quite rare or vulnerable in the wild. This means if you’re interested in adding this unique native to your collection, you’ll want to be extra careful about sourcing it responsibly.

Never collect plants from the wild, and only purchase from reputable native plant nurseries that can verify their stock comes from ethical propagation rather than wild collection. Better yet, consider this plant an inspiration to create habitat for other aquatic natives that are more readily available.

Is Chapman’s Quillwort Right for Your Garden?

Let’s be honest – this isn’t a plant for every garden or every gardener. Chapman’s quillwort is best suited for:

  • Specialized aquatic or bog gardens
  • Rain gardens with consistent moisture
  • Native plant collections focused on rare or unusual species
  • Educational landscapes highlighting plant diversity

If you’re looking for showy flowers or dramatic foliage, this probably isn’t your plant. But if you’re fascinated by botanical history and want to support rare native species, Chapman’s quillwort offers a unique opportunity to connect with ancient plant lineages.

Growing Conditions and Care

Chapman’s quillwort thrives in USDA hardiness zones 8-10, which aligns perfectly with its natural range. In the wild, you’ll find it in shallow water or consistently wet, sandy substrates. It prefers full sun to partial shade and needs that constant moisture – think bog conditions rather than typical garden soil.

This isn’t a plant you can just stick in regular garden soil and expect to thrive. It requires specialized aquatic growing conditions, making it more suitable for dedicated water gardeners or those with experience growing aquatic natives.

Benefits to Your Garden Ecosystem

While Chapman’s quillwort won’t attract butterflies or hummingbirds like flowering natives, it does contribute to aquatic ecosystem health. It can provide habitat for small aquatic creatures and help with water filtration in pond or bog garden settings.

The Bottom Line

Chapman’s quillwort represents something special in the native plant world – a living link to ancient botanical history. While it may not be the right choice for most gardens due to its specialized needs and rarity concerns, it serves as a wonderful reminder of the incredible diversity of native plants in our southeastern ecosystems.

If you’re drawn to this unique native, approach it with respect for its conservation status and consider it part of a larger commitment to protecting and celebrating our native plant heritage. Sometimes the most valuable plants in our collections are the ones that teach us the most about the natural world around us.

Chapman’s Quillwort

Classification

Group

Quillwort

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Lycopodiophyta - Lycopods

Subdivision
Class

Lycopodiopsida

Subclass
Order

Isoetales

Family

Isoetaceae Dumort. - Quillwort family

Genus

Isoetes L. - quillwort

Species

Isoetes flaccida Shuttlw. ex A. Braun - southern quillwort

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