North America Native Plant

Threadleaf Crowfoot

Botanical name: Ranunculus trichophyllus var. trichophyllus

USDA symbol: RATRT

Life cycle: perennial

Habit: forb

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

Synonyms: Batrachium flaccidum (Pers.) Rupr. (BAFL2)  âš˜  Batrachium porteri (Britton) Britton (BAPO3)  âš˜  Batrachium trichophyllum (Chaix) F.W. Schultz (BATR2)  âš˜  Ranunculus aquatilis L. var. capillaceus (Thuill.) DC. (RAAQC2)  âš˜  Ranunculus aquatilis L. var. calvescens (W. Drew) L.D. Benson (RAAQC3)  âš˜  Ranunculus aquatilis L. var. harrisii L.D. Benson (RAAQH2)  âš˜  Ranunculus aquatilis L. var. lalondei L.D. Benson (RAAQL3)  âš˜  Ranunculus aquatilis L. var. porteri (Britton) L.D. Benson (RAAQP2)  âš˜  Ranunculus aquatilis L. var. trichophyllus (Chaix) A. Gray (RAAQT2)  âš˜  Ranunculus flaccidus Pers. (RAFL3)  âš˜  Ranunculus trichophyllus Chaix var. calvescens W. Drew (RATRC2)  âš˜  Ranunculus trichophyllus Chaix var. typicus W. Drew (RATRT2)   

Threadleaf Crowfoot: A Delicate Native Aquatic for Water Gardens If you’ve been dreaming of adding a graceful native aquatic plant to your pond or water garden, threadleaf crowfoot (Ranunculus trichophyllus var. trichophyllus) might just be the perfect choice. This charming perennial brings a touch of wild elegance to any water ...

Rare plant alert!

Region: New Jersey

Status: Highlands Listed, S2: New Jersey Highlands region ⚘ 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) ⚘

Threadleaf Crowfoot: A Delicate Native Aquatic for Water Gardens

If you’ve been dreaming of adding a graceful native aquatic plant to your pond or water garden, threadleaf crowfoot (Ranunculus trichophyllus var. trichophyllus) might just be the perfect choice. This charming perennial brings a touch of wild elegance to any water feature with its feathery underwater foliage and dainty white blooms that dance on the water’s surface.

What Makes Threadleaf Crowfoot Special

Threadleaf crowfoot is a native North American aquatic plant that’s as beautiful as it is beneficial. As a herbaceous perennial forb, it lacks woody stems but makes up for it with incredibly fine, thread-like underwater leaves that create an almost ethereal underwater garden. When it blooms, small white flowers emerge above the water surface, creating a lovely contrast against the submerged greenery.

Where This Native Beauty Calls Home

This widespread native has an impressive range across North America. You’ll find threadleaf crowfoot naturally growing from Alaska and Canada (including Alberta, British Columbia, Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan, Yukon, Northwest Territories, Labrador, and Newfoundland) down through most of the lower 48 states including Arizona, California, Colorado, Connecticut, Idaho, Illinois, Indiana, Iowa, Kansas, Maine, Maryland, Massachusetts, Minnesota, Montana, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Dakota, Oregon, Pennsylvania, Rhode Island, South Dakota, Tennessee, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, and Wyoming.

A Word About Rarity

Before you get too excited about planting threadleaf crowfoot, there’s something important to know. In New Jersey, this species has a rarity status of S2 and is Highlands Listed, meaning it’s considered rare in that state. If you’re gardening in New Jersey or other areas where it might be uncommon, please ensure you source this plant responsibly from reputable native plant nurseries rather than collecting from the wild.

Perfect for Water Gardens and Natural Landscapes

Threadleaf crowfoot thrives in USDA hardiness zones 2-8, making it suitable for most temperate North American gardens. It’s particularly well-suited for:

  • Water gardens and ornamental ponds
  • Bog gardens and rain gardens
  • Natural pond edges and shorelines
  • Native plant landscapes with water features

The plant’s delicate appearance adds texture and movement to water features while providing habitat for aquatic wildlife. Its small white flowers also attract various pollinators, including flies and small bees, making it a valuable addition to pollinator-friendly gardens.

Growing Threadleaf Crowfoot Successfully

The key to success with threadleaf crowfoot is recreating its preferred aquatic conditions:

  • Water requirements: Needs shallow freshwater, either still or slow-moving
  • Light: Prefers full to partial sun
  • Planting: Can be planted directly in shallow water or in containers submerged in ponds
  • Soil: When grown at pond edges, prefers consistently saturated soil

Low-Maintenance Water Gardening

Once established, threadleaf crowfoot is refreshingly low-maintenance. As a native plant, it’s naturally adapted to local conditions and rarely needs intervention. Simply ensure it has access to clean water and adequate light, and it will reward you with its graceful presence season after season.

Is Threadleaf Crowfoot Right for Your Garden?

Consider adding threadleaf crowfoot to your garden if you:

  • Have a pond, water garden, or bog garden
  • Want to support native plant conservation
  • Appreciate delicate, naturalistic beauty over bold garden statements
  • Enjoy low-maintenance aquatic plants
  • Want to provide habitat for aquatic wildlife and pollinators

Remember, if you’re in an area where this plant is considered rare, always source it responsibly and consider it a special addition to your conservation-minded garden. With its widespread native range and gentle beauty, threadleaf crowfoot offers water gardeners a chance to grow something truly special while supporting North American biodiversity.

Threadleaf Crowfoot

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Magnoliidae

Order

Ranunculales

Family

Ranunculaceae Juss. - Buttercup family

Genus

Ranunculus L. - buttercup

Species

Ranunculus trichophyllus Chaix - threadleaf crowfoot

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