North America Native Plant

Caughuawaga Hawthorn

Botanical name: Crataegus suborbiculata

USDA symbol: CRSU3

Life cycle: perennial

Habit: shrub

Native status: Native to Canada âš˜ Native to the lower 48 states  

Synonyms: Crataegus durobrivensis Sarg. (CRDU2)  âš˜  Crataegus kellermanii Sarg. (CRKE5)  âš˜  Crataegus neobaxteri Sarg. (CRNE6)  âš˜  Crataegus saundersiana Sarg. (CRSA10)  âš˜  Crataegus suborbiculata Sarg. var. saundersiana (Sarg.) Kruschke (CRSUS)   

Discovering the Caughuawaga Hawthorn: A Lesser-Known Native Treasure If you’re on the hunt for native plants that go beyond the usual suspects, let me introduce you to the Caughuawaga hawthorn (Crataegus suborbiculata). This perennial shrub might not be the most famous member of the hawthorn family, but it has its ...

Rare plant alert!

Region: Conservation status by state

Status: S3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ 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 ⚘

Discovering the Caughuawaga Hawthorn: A Lesser-Known Native Treasure

If you’re on the hunt for native plants that go beyond the usual suspects, let me introduce you to the Caughuawaga hawthorn (Crataegus suborbiculata). This perennial shrub might not be the most famous member of the hawthorn family, but it has its own unique charm for dedicated native plant gardeners.

What Makes the Caughuawaga Hawthorn Special?

The Caughuawaga hawthorn is a multi-stemmed woody shrub that typically stays under 13-16 feet tall, making it a manageable choice for most landscapes. As a true native species, it’s naturally found across parts of Canada and several U.S. states, giving it serious ecological credentials for native plant enthusiasts.

Where Does It Call Home?

This hawthorn has quite the range! You’ll find it naturally growing across several regions including Manitoba and Ontario in Canada, plus Connecticut, Quebec, Kentucky, Michigan, New York, and Ohio in the United States. Its wide distribution suggests it’s pretty adaptable to different conditions within its native range.

Should You Plant the Caughuawaga Hawthorn?

Here’s where things get interesting. The Caughuawaga hawthorn carries a Global Conservation Status of S3?, which means its status is somewhat undefined – not exactly rare, but not super common either. This makes it a bit of a botanical mystery!

If you’re considering adding this native shrub to your landscape, here are some things to keep in mind:

  • It’s a true native species, supporting local ecosystems
  • As a hawthorn, it likely provides wildlife benefits similar to its cousins
  • Its shrub form makes it versatile for different landscape uses
  • The uncertain conservation status means you’ll want to source it responsibly

Growing Conditions and Care

While specific growing information for Crataegus suborbiculata is limited, hawthorns as a group are generally pretty hardy and adaptable. Most hawthorns prefer:

  • Full sun to partial shade
  • Well-draining soil
  • Moderate water needs once established
  • Cold hardiness appropriate for their native regions

A Word of Caution

Given its S3? conservation status, if you’re interested in growing the Caughuawaga hawthorn, make sure you’re getting your plants from reputable native plant nurseries that source their material responsibly. Never collect from wild populations, and always verify that you’re getting the exact species (Crataegus suborbiculata) rather than a similar hawthorn.

Is This Hawthorn Right for Your Garden?

The Caughuawaga hawthorn might be perfect for you if you’re:

  • A dedicated native plant gardener looking for something unique
  • Located within its natural range
  • Interested in supporting lesser-known native species
  • Planning a naturalized or wildlife-friendly landscape

However, if you’re new to native gardening or want something with more readily available information and plant sources, you might want to start with better-documented native hawthorns in your area.

The Bottom Line

The Caughuawaga hawthorn represents one of those intriguing native plants that serious native gardeners love to discover. While it may not be the easiest species to find or grow, its native status and unique character make it worth considering for the right gardener. Just remember to source responsibly and do your homework before planting!

Caughuawaga 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 suborbiculata Sarg. - Caughuawaga hawthorn

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