North America Native Plant

Quillwort

Botanical name: Isoetes

USDA symbol: ISOET

Life cycle: perennial

Habit: shrub

Native status: Native to Alaska âš˜ Native to Canada âš˜ Native to Greenland âš˜ Native to Hawaii âš˜ Native to the lower 48 states âš˜ Native to St. Pierre and Miquelon  

Quillworts: The Mysterious Ancient Plants Hiding in Your Local Waters If you’ve ever wondered about those peculiar grass-like tufts growing in shallow water or soggy soil, you might have stumbled upon one of nature’s most ancient survivors: the quillwort, scientifically known as Isoetes. These fascinating little plants are living relics ...

Quillworts: The Mysterious Ancient Plants Hiding in Your Local Waters

If you’ve ever wondered about those peculiar grass-like tufts growing in shallow water or soggy soil, you might have stumbled upon one of nature’s most ancient survivors: the quillwort, scientifically known as Isoetes. These fascinating little plants are living relics that have been quietly thriving on Earth for hundreds of millions of years, long before dinosaurs roamed the planet.

What Exactly Is a Quillwort?

Quillworts aren’t your typical garden plants – they’re actually more closely related to ancient tree-sized club mosses than to modern grasses, despite their grass-like appearance. As perennial forb herbs, they lack significant woody tissue and have a unique growth pattern. Their narrow, quill-shaped leaves emerge directly from an underground base, creating distinctive tufts that can easily be mistaken for sedges or young grass shoots.

These remarkable plants reproduce through spores rather than flowers or seeds, making them quite different from the flowering plants most gardeners are familiar with. Think of them as the aquatic cousins of ferns, but with their own special evolutionary twist.

Where Can You Find Quillworts?

Quillworts are impressively widespread across North America, being native to an extensive range that includes Alaska, Canada, Greenland, Hawaii, the lower 48 states, and even St. Pierre and Miquelon. You can find them growing naturally in states and provinces from Alberta to Florida, and from California to Newfoundland – making them one of the most geographically diverse native plant groups on the continent.

Identifying Quillworts in the Wild

Spotting quillworts requires a keen eye, as they often blend into their surroundings. Here’s what to look for:

  • Narrow, grass-like leaves that emerge in tufts from a central base
  • Leaves that are typically 2-8 inches tall, though some species can grow taller
  • Plants growing in or near water – think pond edges, muddy shores, or seasonally flooded areas
  • A somewhat translucent quality to the leaves when held up to light
  • Small, bulbous bases where spores are produced

Are Quillworts Beneficial in Gardens?

While quillworts won’t provide the showy blooms or dramatic foliage that many gardeners seek, they do offer unique benefits for specialized garden settings:

For Water Gardens: Quillworts can add authentic native character to naturalized pond edges and bog gardens. Their subtle presence creates a more natural, less manicured appearance that many wildlife gardeners appreciate.

For Ecological Value: These ancient plants contribute to biodiversity and can help stabilize muddy soils with their root systems. They’re part of the complex web of life that supports various aquatic and semi-aquatic creatures.

For Educational Interest: Having living representatives of such an ancient plant lineage in your landscape can be a fascinating conversation starter and educational tool for children and visitors interested in plant evolution.

The Reality of Growing Quillworts

Here’s where things get interesting – and perhaps a bit challenging for the average gardener. Quillworts have very specific habitat requirements that can be difficult to replicate in typical garden settings. They need consistently moist to submerged conditions, specific soil types, and often particular water chemistry conditions that vary by species.

If you’re lucky enough to have suitable habitat on your property – such as a natural pond, seasonal wetland, or bog area – you might already have quillworts growing there naturally. In this case, the best approach is simply to appreciate and protect what’s already there rather than trying to introduce new plants.

A Word of Caution

Before attempting to collect or transplant quillworts, it’s important to know that many species have specific habitat requirements and some may be sensitive to disturbance. Always check local regulations and consider consulting with native plant societies or botanical experts in your area if you’re interested in learning more about the species in your region.

The Bottom Line

Quillworts may not be the flashy garden stars that grace magazine covers, but they’re remarkable survivors with an incredible evolutionary story. Whether you encounter them in the wild or are fortunate enough to have them naturally occurring on your property, these ancient plants deserve our respect and protection. They remind us that not all garden treasures are about bold colors and dramatic shapes – sometimes the most fascinating plants are the quiet, unassuming ones that have been perfecting their survival strategies for millions of years.

Next time you’re near a pond, marsh, or muddy shoreline, take a moment to look for these living fossils. You might just find yourself face-to-face with one of Earth’s most enduring botanical success stories.

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

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