North America Native Plant

Nuttall’s Water-starwort

Botanical name: Callitriche pedunculosa

USDA symbol: CAPE44

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Callitriche nuttallii Torr. (CANU10)   

Nuttall’s Water-Starwort: A Rare Native Gem for Water Gardens If you’re looking to add authentic native character to your water garden or bog area, Nuttall’s water-starwort (Callitriche pedunculosa) might just be the understated beauty you’ve been searching for. This petite aquatic annual brings genuine southeastern charm to specialized garden settings, ...

Rare plant alert!

Region: Arkansas

Status: S2: Status is uncertain but is somewhere between the following rankings: 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) ⚘

Nuttall’s Water-Starwort: A Rare Native Gem for Water Gardens

If you’re looking to add authentic native character to your water garden or bog area, Nuttall’s water-starwort (Callitriche pedunculosa) might just be the understated beauty you’ve been searching for. This petite aquatic annual brings genuine southeastern charm to specialized garden settings, though its rarity means you’ll want to source it responsibly.

What Is Nuttall’s Water-Starwort?

Nuttall’s water-starwort is a small, herbaceous annual that belongs to the fascinating world of aquatic plants. As a forb—meaning it’s a non-woody plant that dies back each season—this little charmer spends its life cycle in and around water. Don’t expect showy blooms or dramatic foliage; this plant is all about subtle, natural beauty and ecological function.

You might also encounter this species listed under its scientific synonym, Callitriche nuttallii, in older gardening references or plant databases.

Where Does It Call Home?

This southeastern native has a fairly extensive range across the lower 48 states, naturally occurring in Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, Oklahoma, Tennessee, and Texas. It’s particularly at home in the coastal plains and wetland areas of these regions.

A Word About Rarity

Important note for responsible gardeners: Nuttall’s water-starwort has a rarity status of S2 in Arkansas, meaning it’s considered rare in that state. If you’re interested in growing this native beauty, please ensure you source it from reputable native plant nurseries that propagate their own stock rather than collecting from wild populations. This helps protect remaining natural populations while still allowing you to enjoy this special plant.

Why Grow Nuttall’s Water-Starwort?

Here’s why this unassuming aquatic might earn a spot in your specialized garden areas:

  • Authentic native character: Adds genuine regional authenticity to southeastern water features
  • Wetland restoration value: Perfect for rain gardens, bioswales, or naturalized wetland areas
  • Low maintenance: Once established in suitable conditions, it largely takes care of itself
  • Educational value: Great conversation starter about native aquatic ecosystems
  • Habitat creation: Provides microhabitat for small aquatic creatures

Perfect Garden Settings

Nuttall’s water-starwort isn’t your typical perennial border plant. Instead, it shines in these specialized settings:

  • Water gardens with shallow areas or muddy margins
  • Bog gardens designed to mimic natural wetlands
  • Rain gardens in appropriate climate zones
  • Naturalized pond edges
  • Educational or demonstration wetland gardens
  • Seasonal pool recreations

Growing Conditions and Care

Success with Nuttall’s water-starwort depends on recreating its preferred wetland conditions:

Water requirements: This plant lives up to its water-starwort name, requiring consistently moist to wet conditions. It thrives in shallow water, along muddy shorelines, or in areas that experience seasonal flooding.

Light needs: Performs best in full sun to partial shade, adapting well to the changing light conditions typical of wetland environments.

Climate zones: Hardy in USDA zones 7-10, matching its natural southeastern range.

Soil preferences: Prefers muddy, organic-rich soils typical of wetland areas. Good drainage is not a concern—quite the opposite!

Planting and Care Tips

Growing this specialized native requires some specific considerations:

  • Timing: As an annual, plant seeds or seedlings in spring after frost danger passes
  • Location: Choose spots that stay consistently moist or wet throughout the growing season
  • Propagation: May self-seed in favorable conditions, creating natural colonies over time
  • Maintenance: Minimal care needed once established in proper conditions
  • Winter care: Being annual, plants will die back in winter, but may return from seed

Ecological Benefits

While Nuttall’s water-starwort may not be a major pollinator magnet due to its tiny, wind-pollinated flowers, it serves important ecological functions. Its wetland indicator status as a Facultative Wetland plant means it usually occurs in wetlands but can tolerate some variation in moisture levels, making it valuable for transitional habitats.

Is This Plant Right for You?

Nuttall’s water-starwort is definitely a specialized choice that won’t work for every garden. Consider it if you:

  • Have or are creating water features, bog gardens, or rain gardens
  • Live within its native range (southeastern U.S.)
  • Are passionate about growing authentic native plants
  • Want to support rare native species through responsible cultivation
  • Appreciate subtle, naturalistic plantings over showy displays

Skip this one if you’re looking for dramatic flowers, have only conventional dry garden beds, or live outside its natural climate range.

The Bottom Line

Nuttall’s water-starwort offers dedicated water gardeners and native plant enthusiasts a chance to grow something truly special and regionally authentic. While it may not provide the instant gratification of flashier water plants, its subtle charm and ecological value make it a worthwhile addition to appropriate garden settings. Just remember to source it responsibly to help protect this rare native treasure for future generations to enjoy.

Nuttall’s Water-starwort

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

Callitrichales

Family

Callitrichaceae Link. - Water-starwort family

Genus

Callitriche L. - water-starwort

Species

Callitriche pedunculosa Nutt. - Nuttall's water-starwort

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