Ashy dogweed (Thymophylla tephroleuca)

Federal Register | Recovery | Critical Habitat | Conservation Plans | Petitions | Life History

Listing Status:   


General Information

Ashy dogweed, also known as ashy pricklyleaf, is a member of the sunflower family (Asteraceae).

  • States/US Territories in which the Ashy dogweed, Wherever found is known to or is believed to occur:  Texas
  • US Counties in which the Ashy dogweed, Wherever found is known to or is believed to occur:  View All
  • USFWS Refuges in which the Ashy dogweed, Wherever found is known to occur:  Lower Rio Grande Valley National Wildlife Refuge
  • Additional species information
Current Listing Status Summary
Status Date Listed Lead Region Where Listed
1984-07-19 Southwest Region (Region 2) Wherever found

» Federal Register Documents

Federal Register Documents
Date Citation Page Title
1975-07-01 00:00:00.0 40 FR 27924 Review of Status of Vascular Plants
2009-02-11 00:00:00.0 74 FR 6917 6919 5-Year Reviews of 23 Southwestern Species
1984-07-19 00:00:00.0 49 FR 29232 29234 Final Rule to Determine Dyssodia tephroleuca (Ashy dogweed) to be End. Species; 49 FR 29232-29234
1983-07-22 00:00:00.0 48 FR 33501 33503 Proposal to Determine Dyssodia tephroleuca (Ashy dogweed) to be End. Species; 48 FR 33501-33503

» Recovery

Current Recovery Plan(s)
Date Title Plan Action Status Plan Status
1988-07-29 Ashy Dogweed (Thymophylla tephroleuca) Recovery Plan View Implementation Progress Final
Other Recovery Documents
Date Citation Page Title Document Type
2009-02-11 74 FR 6917 6919 5-Year Reviews of 23 Southwestern Species
  • Notice 5-year Review, Initiation
Five Year Review
Date Title
2011-10-07 Five Year Review for Ashy Dogweed

» Critical Habitat

No critical habitat rules have been published for the Ashy dogweed.

» Conservation Plans

No conservation plans have been created for Ashy dogweed.

» Petitions

» Life History

Habitat Requirements

Ashy dogweed grows among shrubs such as mesquite (Prosopis glandulosa), calderona (Krameria ramosissima), Texas lantana (Lantana urticoides), goatbush (Castela erecta), anacahuita (Cordia boissieri) and cenizo (Leucophyluum frutescens) among others. Other plants that grow in association with ashy dogweed include cardinal feather (Acalpha radians), trailing windmills (Allionia incarnate), three awn (Aristida sp.), bearded swallow wort (Cynanchum barbigerum), velvet bundleflower (Desmanthus velutinus), firewheel (Gallardia pulchella), Texas burstwort (Hermannia texana), the mimoas,( Mimosa aculeaticarpa var. biuncifera and Mimosa latidens), shrubby coldenia (Tiquilia canescens) and non native species such as buffelgrass (Pennisetum ciliare )

Food Habits

Ashy dogweed usually grows in sandy to sandy loam soils that are level or in gentle, rolling topography.

Movement / Home Range

Ashy dogweed is known to occur in Starr, Zapata and Webb counties, Texas.

Reproductive Strategy

Flowers are bright golden yellow and are solitary at the end of branch tips. Bracts associated with the outside of the flowerhead (phyllaries) have a pair of yellow glands near the top, where the tips are triangular. Ashy dogweed forms dense, circular clusters of numerous flowers especially after rains, but can become brittle and white if environmental conditions are dry.


Ashy dogweed is covered with soft wooly hairs and is an herbaceous perennial wildflower. The plant is approximately 12 inches (30 centimeters) tall and has grayish green, ashy colored stems and leaves. The stems are woody at the base and upper stems are covered with dense, white, wool-like hairs. The leaves are alternate, linear to filiform and with a three-lobed apex. The leaves are 0.3 -0.6 inches (8 -15 millimeters) long and 0.1 0.4 inches (0.03-1.0 mm) wide.

» Other Resources

NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.