North America Native Plant

Slender Tansyaster

Botanical name: Psilactis tenuis

USDA symbol: PSTE6

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Machaeranthera tenuis (S. Watson) B.L. Turner & Horne (MATE11)   

Slender Tansyaster: A Delicate Texas Native Worth Discovering If you’re looking for a charming, low-maintenance addition to your Texas native garden, let me introduce you to the slender tansyaster (Psilactis tenuis). This delicate annual wildflower might not be the showiest plant in your garden, but it brings a quiet elegance ...

Slender Tansyaster: A Delicate Texas Native Worth Discovering

If you’re looking for a charming, low-maintenance addition to your Texas native garden, let me introduce you to the slender tansyaster (Psilactis tenuis). This delicate annual wildflower might not be the showiest plant in your garden, but it brings a quiet elegance that’s perfect for naturalized landscapes and prairie-style plantings.

Meet the Slender Tansyaster

The slender tansyaster is a true Texas native that belongs to the sunflower family. As its common name suggests, this petite forb has a graceful, slender appearance that adds texture and movement to garden spaces. You might also encounter it listed under its botanical synonym, Machaeranthera tenuis, in older gardening references.

This annual plant completes its entire life cycle in one growing season, making it an excellent choice for gardeners who enjoy the surprise of self-seeding plants and ever-changing garden displays.

Where You’ll Find It Growing Wild

Slender tansyaster is endemic to Texas, where it has adapted perfectly to the state’s diverse growing conditions. You’ll find this native beauty growing wild in central and south-central regions of the Lone Star State, thriving in areas that many other plants might find challenging.

Why Texas Gardeners Love This Native

There are several compelling reasons to consider adding slender tansyaster to your landscape:

  • True Texas heritage: As a native species, it’s perfectly adapted to local climate conditions
  • Low maintenance: Once established, it requires minimal care and water
  • Pollinator magnet: The small, daisy-like flowers attract native bees, butterflies, and other beneficial insects
  • Self-seeding habit: Provides natural garden renewal year after year
  • Drought tolerance: Perfect for water-wise landscaping

Perfect Garden Settings

Slender tansyaster shines in several garden styles:

  • Wildflower meadows: Adds delicate texture among bolder native blooms
  • Prairie restorations: Helps recreate authentic Texas grassland ecosystems
  • Xerophytic gardens: Thrives in low-water, drought-tolerant landscapes
  • Naturalized areas: Perfect for informal, hands-off garden spaces

Growing Conditions and Care

One of the best things about slender tansyaster is how easy it is to grow, especially if you work with its natural preferences:

Sunlight: Provide full sun for the best growth and flowering. This sun-loving native won’t be happy in shady spots.

Soil: Well-draining soil is essential. This plant is quite adaptable to different soil types as long as water doesn’t sit around the roots.

Water: Once established, slender tansyaster is remarkably drought tolerant. Overwatering is more likely to cause problems than underwatering.

Climate zones: Best suited for USDA hardiness zones 8-10, which perfectly matches its native Texas range.

Planting and Propagation Tips

Getting slender tansyaster established in your garden is refreshingly straightforward:

  • Timing: Direct seed in fall for spring emergence, mimicking natural patterns
  • Seeding: Scatter seeds in prepared soil and lightly cover or rake in
  • Spacing: Allow plants room to spread naturally – they’ll find their own spacing
  • Maintenance: Minimal care needed once established; let plants go to seed for natural renewal

Supporting Local Wildlife

By choosing native plants like slender tansyaster, you’re creating habitat for local wildlife. The flowers provide nectar for small native bees and butterflies, while the seeds may feed small birds. It’s a small but meaningful way to support your local ecosystem.

Is Slender Tansyaster Right for Your Garden?

This native gem is perfect for Texas gardeners who appreciate subtle beauty over flashy displays. If you’re creating a low-maintenance, water-wise garden that supports local wildlife, slender tansyaster deserves a spot in your landscape. Its delicate flowers and self-seeding habit make it ideal for gardeners who enjoy naturalized, ever-changing garden spaces.

While it might not be the star of your garden show, slender tansyaster plays an important supporting role in native plant communities – just like it does in the wild Texas landscapes where it belongs.

Slender Tansyaster

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

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Psilactis A. Gray - tansyaster

Species

Psilactis tenuis S. Watson - slender tansyaster

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