| 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]
