Thymophylla pentachaeta
| Thymophylla pentachaeta | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Thymophylla |
| Species: | T. pentachaeta |
| Binomial name | |
| Thymophylla pentachaeta | |
| Synonyms[1] | |
| |
Thymophylla pentachaeta, also known as fiveneedle pricklyleaf,[2] golden dyssodia or dogweed, is a perennial or subshrub in the family Asteraceae.
The plant grows up to 20 centimetres (8 in) tall. The leaves are about 1.5 cm (1⁄2 in) long and pinnately divided. From April to October, atop leafless stalks are solitary yellow flower heads, 13 millimetres (1⁄2 in) wide, with 8–13 rays surrounding disk flowers.[3] T. acerosa is woodier, with leaves closer to the flowers.[3]
Four varieties are recognised:[1]
- Thymophylla pentachaeta var. belenidium (DC.) Strother
- Thymophylla pentachaeta var. hartwegii (A.Gray) Strother
- Thymophylla pentachaeta var. pentachaeta
- Thymophylla pentachaeta var. puberula (Rydb.) Strother
The species is native to the southwestern and south-central United States, Mexico, and Argentina,[1] being found in arid climates.[3]
References
- ^ a b c "Thymophylla pentachaeta (DC.) Small". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2 April 2025.
- ^ NRCS. "Thymophylla pentachaeta". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 10 December 2015.
- ^ a b c Spellenberg, Richard (2001) [1979]. National Audubon Society Field Guide to North American Wildflowers: Western Region (rev ed.). Knopf. pp. 401–402. ISBN 978-0-375-40233-3.
External links
- Thymophylla pentachaeta Flora of North America
- Dyssodia pentachaeta University of Arizona Pima County Cooperative Extension
Media related to Thymophylla pentachaeta at Wikimedia Commons