Stems moderately to intricately branched; proximal mostly 1–2(–2.5) mm wide. Leaves: basal and proximal cauline blades oblanceolate, 20–40 × 3–8 mm, margins deeply dentate to pinnately lobed.

Phenology: Flowering Mar–Jun (or sporadically with rain).
Habitat: Open habitats in deep, loose sand, sometimes with oaks
Elevation: 800–1300 m

Distribution

• Generated Map
• Legacy Map

N.Mex., Tex., Mexico (Chihuahua).

Discussion

Intergrades between var. arenarius and var. robustus occur in Ward and Winkler counties, Texas.

Selected References

None.

Lower Taxa

None.