North America Non-native Plant

Hieracium ×flagellare Var. Glatzense

Botanical name: Hieracium ×flagellare var. glatzense

USDA symbol: HIFLG3

Native status: Not native but doesn't reproduce and persist in the wild

Synonyms: Hieracium flagellare Willd. ssp. glatzense Naegeli & Peter (HIFLG4)   

Hieracium ×flagellare var. glatzense: A Mysterious Hawkweed Variety If you’ve stumbled across the name Hieracium ×flagellare var. glatzense in your plant research, you’ve discovered one of botany’s more elusive characters. This particular variety of hawkweed is so specialized and uncommon that even seasoned gardeners and botanists might scratch their heads ...

Hieracium ×flagellare var. glatzense: A Mysterious Hawkweed Variety

If you’ve stumbled across the name Hieracium ×flagellare var. glatzense in your plant research, you’ve discovered one of botany’s more elusive characters. This particular variety of hawkweed is so specialized and uncommon that even seasoned gardeners and botanists might scratch their heads when encountering it.

What We Know About This Plant

Hieracium ×flagellare var. glatzense belongs to the hawkweed genus, a group known for their dandelion-like yellow flowers and often weedy nature. The × in the name tells us this is a hybrid, while var. glatzense suggests a connection to the Glatz region, likely in Central Europe. It’s also known by the synonym Hieracium flagellare Willd. ssp. glatzense Naegeli & Peter.

The Challenge for Gardeners

Here’s where things get tricky: reliable information about this specific variety’s growing requirements, native range, and garden performance is remarkably scarce. This isn’t uncommon with highly specialized plant varieties, especially older taxonomic designations that may have fallen out of common use or been reclassified over time.

Geographic Distribution

The geographic distribution of this variety remains unclear from available sources, though the variety name suggests European origins, possibly from the historical Glatz region.

Should You Grow This Plant?

Given the lack of readily available information about Hieracium ×flagellare var. glatzense, most gardeners would be better served by choosing well-documented native plants for their landscapes. Without clear data on:

  • Growing conditions and care requirements
  • USDA hardiness zones
  • Potential invasive characteristics
  • Wildlife and pollinator benefits
  • Mature size and growth habits

It’s difficult to recommend this plant for home gardens with confidence.

Better Alternatives

If you’re interested in hawkweed-type plants or native wildflowers with similar characteristics, consider researching well-documented native species in your area. Many regions have native composites (plants in the sunflower family) that provide similar aesthetic appeal with known benefits for local wildlife and clear growing requirements.

For the Botanical Curious

If you’re a plant collector or botanical enthusiast specifically seeking this variety, your best bet would be to contact specialized botanical gardens, herbaria, or academic institutions that maintain collections of Hieracium species. They may have more detailed information about this particular variety or could point you toward current taxonomic treatments.

Sometimes in the plant world, the most interesting discoveries are the ones that remind us how much we still don’t know—and Hieracium ×flagellare var. glatzense certainly fits that description!

Hieracium ×flagellare Var. Glatzense

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