North America Non-native Plant

Hawkweed

Botanical name: Hieracium ×flagellare var. cernuiforme

USDA symbol: HIFLC

Life cycle: perennial

Habit: forb

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Synonyms: Hieracium ×duplex Peter (HIDU2)  âš˜  Hieracium flagellare Willd. ssp. cernuiforme Naegeli & Peter (HIFLC2)  âš˜  Hieracium ×macrostolonum G. Schneid. (HIMA4)   

Understanding Hawkweed: A Lesser-Known Perennial Worth Knowing About If you’ve stumbled upon the name Hieracium ×flagellare var. cernuiforme while researching plants, you’ve discovered one of the more obscure members of the hawkweed family. While most gardeners are familiar with common hawkweeds, this particular variety is quite the botanical wallflower – ...

Understanding Hawkweed: A Lesser-Known Perennial Worth Knowing About

If you’ve stumbled upon the name Hieracium ×flagellare var. cernuiforme while researching plants, you’ve discovered one of the more obscure members of the hawkweed family. While most gardeners are familiar with common hawkweeds, this particular variety is quite the botanical wallflower – rarely discussed but worth understanding if you encounter it in your gardening adventures.

What Exactly Is This Hawkweed?

Hieracium ×flagellare var. cernuiforme is a perennial forb, which simply means it’s a non-woody plant that comes back year after year. The × symbol in its name indicates it’s a hybrid, born from the crossing of two different hawkweed species. Think of it as nature’s own plant experiment!

This particular hawkweed goes by several scientific aliases, including Hieracium ×duplex Peter and Hieracium ×macrostolonum G. Schneid., which shows just how much botanists have puzzled over its classification over the years.

Where You’ll Find It

Currently, this hawkweed variety has been documented only in New York state. Its limited distribution makes it quite the regional specialty – you’re unlikely to encounter it in most other parts of the United States.

The Native Plant Perspective

Here’s where things get interesting from a native gardening standpoint: this hawkweed is not native to North America. It’s what botanists call an introduced species that has managed to establish itself and reproduce without human assistance. While it’s currently not listed as invasive, its non-native status means it doesn’t provide the same ecological benefits as indigenous plants.

Should You Plant It?

Given the limited information available about this specific variety and its non-native status, most gardeners would be better served by choosing native alternatives. The hawkweed family includes many species, and some have aggressive tendencies that can overwhelm garden spaces and native ecosystems.

Instead of seeking out this obscure variety, consider these native alternatives that offer similar perennial forb characteristics:

  • Wild bergamot (Monarda fistulosa)
  • New England aster (Symphyotrichum novae-angliae)
  • Black-eyed Susan (Rudbeckia species)
  • Wild columbine (Aquilegia canadensis)

The Bottom Line

While Hieracium ×flagellare var. cernuiforme might sound impressive with its lengthy scientific name, it remains a botanical curiosity rather than a garden staple. Its limited distribution, non-native status, and lack of readily available cultivation information make it more of an academic interest than a practical garden choice.

For gardeners passionate about supporting local ecosystems and wildlife, investing in well-documented native perennials will provide much greater rewards – both for your garden’s beauty and for the creatures that call your landscape home. Sometimes the most fascinating plants are the ones we admire from afar rather than invite into our gardens!

Hawkweed

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

Hieracium L. - hawkweed

Species

Hieracium ×flagellare Willd. (pro sp.) [caespitosum × pilosella] - hawkweed

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