Perennials or subshrubs, 10–30(–50) cm. Cauline leaves crowded to ± scattered over proximal 1/3–1/2 of plant heights, internodes mostly 5–50(–80+) mm; lobes mostly linear to filiform, sometimes oblanceolate, (5–)15–75 × 0.5–1(–2) mm. Calyculi of 3–5+ ovate to oblong bractlets 1–3 mm. Ray florets usually 8, rarely 0; laminae yellow, 4–8(–12+) mm. Disc corollas red-brown, throats shorter than lobes. Cypselae 4–5+ mm; pappi usually 1.5–2+ mm, rarely 0. 2n = 44.

Phenology: Flowering Mar–Jun.
Habitat: Disturbed sites on sands or clays
Elevation: 10–200 m

Distribution

• Generated Map
• Legacy Map

N.Mex., Tex., Mexico (Nuevo León, Tamaulipas).

Discussion

Thelesperma ambiguum is similar to T. megapotamicum; it may be better treated as a variety of the latter.

Selected References

None.

Lower Taxa

None.