Leaf blades mostly 8–20 cm × 5–20 (–25) mm. Phyllaries: bases ± rounded, apices acuminate or attenuate to linear or filiform. Ray laminae 15–50 mm. Cypselae 7–9 mm; pappi 0.01–0.5 mm. 2n = 38 (subspp. unknown).

Distribution

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w United States.

Discussion

Subspecies 3 (3 in the flora).

The subspecies of Scabrethia scabra evidently have evolved along with the dissection of the Colorado Plateau.

Selected References

None.

Lower Taxa

Scabrethia scabra subsp. attenuata, Scabrethia scabra subsp. canescens, Scabrethia scabra subsp. scabra

Key

1	Outer phyllaries: chartaceous bases ovate to oblong, 2–4(–6) mm, herbaceous tips attenuate to linear or filiform, 15–30+ mm, margins ± hispid (ciliate), faces glabrous or minutely gland-dotted	Scabrethia scabra subsp. attenuata
1	Outer phyllaries: chartaceous bases deltate to ovate, 2–5+ mm, herbaceous tips narrowly triangular to attenuate, 10–20 mm, margins (ciliolate or not) and faces minutely hispidulous to hirtellous or ± coarsely hispid	> 2
2	Herbaceous tips of outer phyllaries usually spreading to recurved, margins (not ciliate) and faces minutely hispidulous to hirtellous	Scabrethia scabra subsp. canescens
2	Herbaceous tips of outer phyllaries usually ± erect to spreading, margins (± ciliate) and faces ± coarsely hispid	Scabrethia scabra subsp. scabra