North America Native Plant

Hooker’s Scratchdaisy

Botanical name: Croptilon hookerianum var. graniticum

USDA symbol: CRHOG

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Croptilon divaricatum (Nutt.) Raf. var. graniticum (E.B. Sm.) Shinners (CRDIG)  âš˜  Haplopappus validus (Rydb.) Cory ssp. graniticus E.B. Sm. (HAVAG)   

Hooker’s Scratchdaisy: A Little-Known Texas Native Worth Discovering If you’re passionate about native Texas plants and love the idea of growing something truly unique in your garden, Hooker’s scratchdaisy (Croptilon hookerianum var. graniticum) might just pique your interest. This lesser-known annual belongs to the sunflower family and represents a special ...

Hooker’s Scratchdaisy: A Little-Known Texas Native Worth Discovering

If you’re passionate about native Texas plants and love the idea of growing something truly unique in your garden, Hooker’s scratchdaisy (Croptilon hookerianum var. graniticum) might just pique your interest. This lesser-known annual belongs to the sunflower family and represents a special piece of Texas botanical heritage that deserves more attention from native plant enthusiasts.

What Makes This Plant Special?

Hooker’s scratchdaisy is a native annual forb, which means it’s an herbaceous flowering plant that completes its entire life cycle in one growing season. As a member of the Asteraceae family (the sunflower clan), it likely produces small daisy-like flowers that could add delicate charm to naturalized areas. The plant gets its somewhat amusing common name from its scratchy texture—a characteristic that might actually be a feature rather than a bug for gardeners looking to add interesting textures to their landscapes.

You might also encounter this plant listed under its botanical synonyms, including Croptilon divaricatum var. graniticum or Haplopappus validus ssp. graniticus, which can make tracking down information about it feel like a botanical treasure hunt!

Where Does It Call Home?

This variety is exclusively native to Texas, making it a true Lone Star State endemic. Its limited geographical distribution means that if you’re gardening in Texas, you have the special opportunity to grow something that exists nowhere else in the world naturally.

Should You Grow Hooker’s Scratchdaisy?

Here’s where things get interesting—and a bit challenging. While this native annual has undeniable appeal for collectors of rare Texas flora, there’s limited information available about its specific cultivation requirements, appearance, and garden performance. This lack of horticultural knowledge means you’d essentially be pioneering its use in garden settings.

The Pros:

  • Native Texas plant supporting local ecosystems
  • Likely provides benefits to native pollinators as a member of the Asteraceae family
  • Annual nature means low long-term commitment if it doesn’t work out
  • Unique addition that few other gardeners will have
  • Supports conservation through cultivation

The Challenges:

  • Very limited availability in the nursery trade
  • Minimal information about growing requirements
  • Unknown garden performance and aesthetic qualities
  • May require specialized growing conditions

Growing Tips (Based on General Principles)

Since specific cultivation information for this variety is scarce, here are some educated guidelines based on its plant family and Texas native status:

  • As a Texas native annual, it likely prefers well-draining soil and full sun
  • Being an annual, direct seeding in fall or early spring would probably work best
  • Like many native Texas plants, it probably tolerates drought once established
  • May do well in naturalized prairie or wildflower garden settings

The Bottom Line

Hooker’s scratchdaisy represents the adventurous side of native plant gardening. If you’re an experienced native plant enthusiast in Texas looking for a challenge, have access to seeds through botanical networks, and enjoy the process of experimenting with little-known species, this could be a rewarding project. However, if you’re looking for reliable, well-documented native plants for your Texas garden, you might want to start with more established natives like Texas bluebonnet, black-eyed Susan, or purple coneflower before tackling this botanical mystery.

Sometimes the most rewarding gardening experiences come from taking chances on the unknown—and Hooker’s scratchdaisy certainly fits that bill!

Hooker’s Scratchdaisy

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

Croptilon Raf. - scratchdaisy

Species

Croptilon hookerianum (Torr. & A. Gray) House - Hooker's scratchdaisy

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