North America Native Plant

Whitemouth Dayflower

Botanical name: Commelina erecta var. angustifolia

USDA symbol: COERA

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Commelina angustifolia Michx. (COAN8)  âš˜  Commelina crispa Wooton (COCR4)  âš˜  Commelina erecta L. var. crispa (Wooton) Palmer & Steyerm. (COERC)  âš˜  Commelina nashii Small (CONA)   

Whitemouth Dayflower: A Charming Native Ground Cover for Your Garden Meet the whitemouth dayflower (Commelina erecta var. angustifolia), a delightful native perennial that’s been quietly beautifying American landscapes long before suburban lawns became the norm. This unassuming little forb might not win any flashy flower contests, but it’s got personality, ...

Whitemouth Dayflower: A Charming Native Ground Cover for Your Garden

Meet the whitemouth dayflower (Commelina erecta var. angustifolia), a delightful native perennial that’s been quietly beautifying American landscapes long before suburban lawns became the norm. This unassuming little forb might not win any flashy flower contests, but it’s got personality, resilience, and a important role to play in native gardening.

What Makes Whitemouth Dayflower Special?

Don’t let the name fool you – while this plant is called whitemouth, it actually produces charming small blue flowers with distinctive white centers that peek out like tiny morning surprises. The narrow, grass-like leaves give it an understated elegance that works beautifully as a ground cover or naturalized planting.

As a native forb, whitemouth dayflower is a vascular plant without woody stems, meaning it dies back to the ground each winter and returns fresh each spring. It’s the kind of reliable, low-maintenance plant that makes gardeners smile.

Where Does It Call Home?

This variety of dayflower is native to the lower 48 states and has quite an impressive natural range. You’ll find it growing wild across Alabama, Arizona, Arkansas, Colorado, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Mississippi, Missouri, Nebraska, New Mexico, North Carolina, Oklahoma, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Virginia, West Virginia, and Wyoming.

Why Plant Whitemouth Dayflower?

Here’s where this little native really shines:

  • Pollinator magnet: Those morning blooms attract small bees and other beneficial pollinators to your garden
  • Low maintenance: Once established, it’s quite drought tolerant and requires minimal care
  • Natural beauty: Perfect for wildflower gardens, prairie restorations, and informal landscape designs
  • Native credentials: Supporting local ecosystems while reducing the need for intensive maintenance
  • Adaptable: Thrives in USDA hardiness zones 5-10, making it suitable for most of the continental US

Growing Your Whitemouth Dayflower

The beauty of native plants like whitemouth dayflower is that they’re naturally adapted to local conditions, making them relatively easy to grow successfully.

Ideal Growing Conditions:

  • Light: Full sun to partial shade – quite flexible!
  • Soil: Well-drained soils; not particularly fussy about soil type
  • Water: Drought tolerant once established, though regular water during establishment helps
  • Space: Works well as ground cover or in naturalized plantings

Planting and Care Tips:

  • Plant in spring after the last frost date in your area
  • Space plants according to your desired coverage – they’ll fill in naturally
  • Water regularly during the first growing season to help establish roots
  • Minimal fertilization needed – these natives are adapted to local soil conditions
  • Allow plants to self-seed for natural spreading, or collect seeds for controlled propagation
  • Cut back in late fall or early spring before new growth emerges

Perfect Garden Companions

Whitemouth dayflower plays well with others, especially in native plant communities. Consider pairing it with other regional natives like native grasses, wildflowers, and shrubs that share similar growing requirements. It’s particularly at home in prairie-style gardens, natural areas, and anywhere you want a low-maintenance ground cover with ecological benefits.

The Bottom Line

If you’re looking for a reliable, native ground cover that supports local wildlife while requiring minimal fuss, whitemouth dayflower deserves a spot in your garden. It may not be the showiest plant in your landscape, but sometimes the quiet performers are exactly what your garden needs. Plus, there’s something deeply satisfying about growing plants that truly belong in your local ecosystem – and your local pollinators will thank you for it!

Whitemouth Dayflower

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Commelinales

Family

Commelinaceae Mirb. - Spiderwort family

Genus

Commelina L. - dayflower

Species

Commelina erecta L. - whitemouth dayflower

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