North America Native Plant

Maccart’s Sundrops

Botanical name: Calylophus hartwegii maccartii

USDA symbol: CAHAM

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Calylophus hartwegii (Benth.) P.H. Raven var. maccartii Shinners (CAHAM2)  âš˜  Oenothera greggii A. Gray var. pringlei Munz (OEGRP3)  âš˜  Oenothera pringlei (Munz) Munz (OEPR4)   

MacCart’s Sundrops: A Charming Texas Native for Your Garden If you’re looking to add a touch of Texas wildflower magic to your garden, MacCart’s sundrops (Calylophus hartwegii maccartii) might just be the perfect native perennial for you. This delightful member of the evening primrose family brings sunny blooms and easy-care ...

MacCart’s Sundrops: A Charming Texas Native for Your Garden

If you’re looking to add a touch of Texas wildflower magic to your garden, MacCart’s sundrops (Calylophus hartwegii maccartii) might just be the perfect native perennial for you. This delightful member of the evening primrose family brings sunny blooms and easy-care charm to gardens throughout its native range.

What Makes MacCart’s Sundrops Special?

MacCart’s sundrops is a perennial forb – essentially a non-woody flowering plant that comes back year after year. Unlike shrubs or trees, this plant keeps its growth close to the ground level, making it perfect for borders, wildflower gardens, or naturalized areas where you want color without overwhelming height.

This plant goes by several botanical names in scientific literature, including Calylophus hartwegii var. maccartii and has historical connections to names like Oenothera greggii var. pringlei. Don’t let all those scientific names intimidate you – it’s still the same cheerful little wildflower!

Where Does It Call Home?

MacCart’s sundrops is proudly native to Texas, making it a fantastic choice for gardeners in the Lone Star State who want to support local ecosystems. As a true Texas native, this plant has evolved to thrive in the unique conditions found in this region, from the climate to the soil types.

Why Consider Growing MacCart’s Sundrops?

There are several compelling reasons to give this native plant a spot in your garden:

  • Native plant benefits: Supporting local wildlife and ecosystems by choosing plants that naturally belong in your area
  • Low maintenance: Native plants typically require less water, fertilizer, and pest control than non-native alternatives
  • Perennial reliability: Once established, this plant returns year after year
  • Authentic Texas character: Add genuine local flavor to your landscape

Growing MacCart’s Sundrops Successfully

While specific growing information for this particular variety is limited in gardening literature, we can make educated recommendations based on its native Texas habitat and relationship to other Calylophus species:

  • Sunlight: Likely prefers full sun to partial sun conditions, typical of Texas wildflowers
  • Soil: Probably adapts well to a range of soil types, including the clay and sandy soils common in Texas
  • Water needs: Once established, should be drought-tolerant like most Texas natives
  • Hardiness: Well-suited to Texas climate conditions

A Word of Caution: Limited Information Available

Here’s where we need to be honest with you – MacCart’s sundrops appears to be a quite specific variety with limited cultivation information readily available in standard gardening resources. This doesn’t mean it’s not a wonderful plant; it might simply be less commonly cultivated or studied than some of its relatives.

If you’re interested in growing this particular variety, consider:

  • Contacting local native plant societies in Texas for growing experiences
  • Checking with native plant nurseries that specialize in Texas flora
  • Looking into other Calylophus species that might be more readily available and have similar characteristics

The Bottom Line

MacCart’s sundrops represents the wonderful diversity of Texas native plants, even if detailed cultivation information is scarce. For gardeners passionate about growing true Texas natives, this plant offers an opportunity to support local ecosystems with an authentic regional species. Just be prepared to do some detective work to find reliable sources and growing information!

Remember, choosing native plants like MacCart’s sundrops isn’t just about having a beautiful garden – it’s about creating habitat for local wildlife and preserving the natural heritage of your region. Every native plant you grow is a small but meaningful contribution to conservation right in your own backyard.

Maccart’s Sundrops

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Myrtales

Family

Onagraceae Juss. - Evening Primrose family

Genus

Calylophus Spach - sundrops

Species

Calylophus hartwegii (Benth.) P.H. Raven - Hartweg's sundrops

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