North America Native Plant

Quillwort Arrowhead

Botanical name: Sagittaria isoetiformis

USDA symbol: SAIS

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Quillwort Arrowhead: A Rare Gem for Your Water Garden If you’re looking to add something truly special to your wetland garden or pond, let me introduce you to a hidden treasure of the southeastern United States: the quillwort arrowhead (Sagittaria isoetiformis). This petite perennial might not be the showiest plant ...

Rare plant alert!

Region: Alabama

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) ⚘

Quillwort Arrowhead: A Rare Gem for Your Water Garden

If you’re looking to add something truly special to your wetland garden or pond, let me introduce you to a hidden treasure of the southeastern United States: the quillwort arrowhead (Sagittaria isoetiformis). This petite perennial might not be the showiest plant in your garden, but it’s a fascinating native that deserves a spot in the right setting.

What Makes Quillwort Arrowhead Special?

Unlike its more familiar cousins in the arrowhead family, quillwort arrowhead breaks the mold with its distinctive appearance. Instead of the typical broad, arrow-shaped leaves you might expect, this little charmer sports narrow, quill-like foliage that gives it its common name. It’s a herbaceous perennial that stays relatively small and unassuming – perfect for gardeners who appreciate subtle beauty.

Where Does It Call Home?

Quillwort arrowhead is a true southeastern native, naturally occurring across six states: Alabama, Florida, Georgia, Mississippi, North Carolina, and South Carolina. This plant has adapted specifically to the unique conditions of the Atlantic and Gulf Coastal Plain regions, as well as the Eastern Mountains and Piedmont areas.

A Word of Caution: This Plant is Rare

Before you get too excited about adding this beauty to your garden, there’s something important you should know. Quillwort arrowhead has a rarity status of S2 in Alabama, meaning it’s quite uncommon in the wild. If you’re interested in growing this plant, please make sure you source it responsibly from reputable native plant nurseries that propagate their own stock – never collect from wild populations.

The Perfect Spot for Quillwort Arrowhead

Here’s where things get specific: this isn’t your average garden plant. Quillwort arrowhead is classified as an obligate wetland species, which means it almost always occurs in wetlands and requires those conditions to thrive. Think of it as nature’s way of saying, I need my feet wet – always!

This makes it perfect for:

  • Pond margins and edges
  • Bog gardens
  • Rain gardens with permanent moisture
  • Wetland restoration projects
  • Native plant gardens with water features

Growing Conditions That Make It Happy

Successfully growing quillwort arrowhead is all about recreating its natural wetland habitat:

  • Moisture: Consistently wet to submerged conditions – this plant doesn’t do drought
  • Light: Full sun to partial shade
  • Climate: Hardy in USDA zones 8-10, matching its southeastern native range
  • Soil: Wet, boggy, or submerged conditions in organic-rich substrates

Why Choose This Wetland Wonder?

You might be wondering why you’d choose such a specialized plant. Here’s the thing: if you have the right conditions, quillwort arrowhead offers unique benefits that more common plants simply can’t match. Its small white flowers provide nectar for aquatic insects and other pollinators, while its specialized niche fills an important role in wetland ecosystems.

For native plant enthusiasts and wetland gardeners, it’s a chance to grow something truly unique – a plant that represents the specialized flora of southeastern wetlands and supports local biodiversity in ways that non-native water plants simply cannot.

The Bottom Line

Quillwort arrowhead isn’t for every garden or every gardener. It requires specific wetland conditions and responsible sourcing due to its rarity. But if you’re creating a native wetland garden, bog garden, or pond feature in the Southeast, and you can source it responsibly, this little native gem offers something special: a chance to grow a piece of your region’s unique natural heritage while supporting local ecosystems.

Just remember: always buy from reputable native plant nurseries, never collect from the wild, and make sure you can provide the consistently wet conditions this wetland specialist needs to thrive.

Quillwort Arrowhead

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Alismatidae

Order

Alismatales

Family

Alismataceae Vent. - Water-plantain family

Genus

Sagittaria L. - arrowhead

Species

Sagittaria isoetiformis J.G. Sm. - quillwort arrowhead

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