North America Native Plant

Midget Quillwort

Botanical name: Isoetes minima

USDA symbol: ISMI4

Life cycle: perennial

Habit: grass

Native status: Native to Canada âš˜ Native to the lower 48 states  

Synonyms: Isoetes howellii Engelm. var. minima (A.A. Eaton) Pfeiffer (ISHOM)   

Midget Quillwort: A Tiny Aquatic Wonder You Probably Haven’t Heard Of Meet the midget quillwort (Isoetes minima), one of nature’s most understated performers. This tiny aquatic plant might not win any beauty contests, but it’s a fascinating piece of botanical history that’s been quietly thriving in Pacific Northwest waters for ...

Rare plant alert!

Region: Conservation status by state

Status: S4S5T1T2: Status is uncertain but is somewhere between the following rankings: 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) ⚘ Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Midget Quillwort: A Tiny Aquatic Wonder You Probably Haven’t Heard Of

Meet the midget quillwort (Isoetes minima), one of nature’s most understated performers. This tiny aquatic plant might not win any beauty contests, but it’s a fascinating piece of botanical history that’s been quietly thriving in Pacific Northwest waters for millions of years.

What Exactly Is a Midget Quillwort?

Don’t let the name fool you – midget quillwort isn’t actually a grass, despite its grass-like appearance. It’s a quillwort, which belongs to an ancient group of plants called lycopods. These living fossils are more closely related to ferns than to the grasses they resemble. Think of them as botanical time travelers that have been perfecting their aquatic lifestyle since before dinosaurs roamed the earth.

The midget quillwort is a perennial plant that reproduces through spores rather than flowers or seeds. Its narrow, quill-like leaves emerge from an underground stem, creating small tufts that look remarkably like miniature grass clumps growing underwater or in muddy shorelines.

Where Does It Call Home?

This little native is quite the homebody, sticking close to the Pacific Northwest. You’ll find midget quillwort naturally growing in British Columbia and Washington state, where it has adapted to the region’s unique climate and seasonal water patterns.

How to Spot a Midget Quillwort in the Wild

Identifying midget quillwort can be tricky since it’s easily mistaken for grass or sedge. Here are the key features to look for:

  • Small tufts of narrow, linear leaves that emerge from the base
  • Leaves are typically 2-6 inches long
  • Growing in or near water – shallow ponds, seasonal pools, or muddy shorelines
  • No visible flowers (remember, it reproduces via spores)
  • Leaves may be partially or completely submerged depending on water levels

Its Role in Wetland Ecosystems

While midget quillwort might seem insignificant, it plays an important role in its aquatic ecosystems. In the Arid West region, it’s considered a facultative wetland plant, meaning it usually grows in wetlands but can tolerate drier conditions. However, in the Western Mountains, Valleys, and Coast region, it’s an obligate wetland species that almost always requires wet conditions to survive.

This adaptability makes it a valuable indicator species for wetland health and seasonal water patterns.

Is It Beneficial for Your Garden?

Here’s where things get interesting – and a bit challenging. Midget quillwort has a Global Conservation Status that suggests it may be uncommon or rare in parts of its range. This makes it more of a plant to appreciate in its natural habitat rather than one to cultivate in home gardens.

If you’re lucky enough to have midget quillwort naturally occurring on your property, consider yourself a steward of something special. These plants prefer:

  • Consistently moist to wet soil conditions
  • Shallow water or seasonal flooding
  • Muddy or sandy substrates
  • Areas with natural water level fluctuations

The Bottom Line

Midget quillwort isn’t your typical garden center find, and that’s probably for the best. This specialized aquatic plant is perfectly adapted to its natural wetland habitats and would be extremely difficult to establish in most home garden settings. Instead of trying to grow it, consider it a delightful discovery if you encounter it during wetland explorations.

If you’re interested in incorporating native Pacific Northwest plants into water features or bog gardens, there are many other native species that are better suited for cultivation and more readily available through responsible native plant suppliers.

Sometimes the best way to appreciate a plant is simply to know it exists, quietly doing its ancient work in the wild spaces where it belongs.

Midget 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 minima A.A. Eaton - midget quillwort

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