North America Native Plant

Warner’s Hawthorn

Botanical name: Crataegus warneri

USDA symbol: CRWA

Life cycle: perennial

Habit: shrub

Native status: Native to the lower 48 states  

Warner’s Hawthorn: A Rare Texas Native Worth Understanding If you’re a native plant enthusiast always on the lookout for something truly special, you might have stumbled across Warner’s hawthorn (Crataegus warneri). But before you start planning where to plant this intriguing shrub, there are some important things you should know ...

Rare plant alert!

Region: Conservation status by state

Status: S3Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Warner’s Hawthorn: A Rare Texas Native Worth Understanding

If you’re a native plant enthusiast always on the lookout for something truly special, you might have stumbled across Warner’s hawthorn (Crataegus warneri). But before you start planning where to plant this intriguing shrub, there are some important things you should know about this rare Texas native.

What Makes Warner’s Hawthorn Special

Warner’s hawthorn is a perennial shrub that’s native to the United States, specifically found in Texas. Like other hawthorns, it’s a multi-stemmed woody plant that typically stays under 13-16 feet tall, though it can occasionally grow taller or develop a single stem depending on environmental conditions.

What makes this particular hawthorn stand out isn’t necessarily its appearance or garden performance—it’s its rarity. This species carries a Global Conservation Status of S3Q, which essentially means its conservation status is undefined or uncertain. In the plant world, that’s a pretty big red flag that tells us this isn’t your average garden center find.

Where You’ll Find It (Or Won’t)

Warner’s hawthorn calls Texas home, but don’t expect to spot it on every nature walk. Its limited distribution and uncertain conservation status suggest this is one of those needle in a haystack native plants that most gardeners will never encounter in the wild.

The Reality Check: Should You Plant It?

Here’s where things get a bit tricky. While we’re all about celebrating native plants, Warner’s hawthorn presents some unique challenges:

  • Its rarity means finding responsibly sourced plants is extremely difficult
  • Very little is known about its specific growing requirements
  • Its uncertain conservation status raises questions about whether it should be cultivated
  • Limited information exists about its garden performance or aesthetic qualities

If you’re absolutely determined to grow this species, the golden rule is this: only use responsibly sourced material. Never collect from wild populations, and make sure any nursery stock comes from legitimate conservation programs or established cultivated sources.

Better Alternatives for Your Texas Garden

Instead of hunting down this botanical unicorn, consider these more readily available native Texas hawthorns that will give you similar benefits with much less uncertainty:

  • Mexican hawthorn (Crataegus mexicana) – better documented and more available
  • Parsley hawthorn (Crataegus marshallii) – gorgeous fall color and easier to source
  • Downy hawthorn (Crataegus mollis) – excellent wildlife value and garden performance

The Bottom Line

Warner’s hawthorn represents one of those fascinating but frustrating aspects of native plant gardening—sometimes the most intriguing species are also the most elusive. While there’s certainly value in preserving and understanding rare plants like this one, for most gardeners, focusing on well-documented, readily available native alternatives will give you better results and fewer headaches.

If you do encounter Warner’s hawthorn in the wild, consider yourself lucky to witness something truly uncommon. Just remember to leave it where you found it and perhaps report your sighting to local botanical organizations—they’d probably love to know more about this mysterious Texas native.

Warner’s Hawthorn

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

Rosales

Family

Rosaceae Juss. - Rose family

Genus

Crataegus L. - hawthorn

Species

Crataegus warneri Sarg. - Warner's hawthorn

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