Hesperidanthus barnebyi

Perennials. Stems few to several from caudex, erect, 1–3.5(–3.8) dm. Leaves subsessile or petiolate, (0.4–1 cm); blade oblong or elliptic to oblanceolate, 1.5–5 cm × 4–24 mm, base cuneate, margins entire or obscurely denticulate, apex obtuse to rounded. Racemes usually 2–8-flowered (rarely more). Fruiting pedicels ascending to divaricate, straight, 10–27 mm. Flowers: sepals green to purple, 5–8 × 2–3 mm; petals white or lilac (with darker purple veins), 9.5–12 × 2.5–3.5 mm, claw distinctly differentiated from blade, (narrower); filaments 2.5–3 mm; anthers linear, 2.5–3 mm; gynophore 0–1.5 mm. Fruits straight or curved, terete, 3.5–5.5 cm × 1–2 mm; ovules 24–42 per ovary; style subclavate, 1–2 mm; stigma flat, obscurely 2-lobed. Seeds 1.8–2.2 × 0.9–1.2 mm.

Phenology: Flowering Apr–Jun.
Habitat: Mixed desert communities
Elevation: 1700-2000 m

Distribution

• Generated Map
• Legacy Map

Utah.

Discussion

Of conservation concern.

The species is restricted to the Chinle Formation in Emery and Wayne counties.

Hesperidanthus barnebyi, as Schoenocrambe barnebyi, is in the Center for Plant Conservation’s National Collection of Endangered Plants.

Selected References

None.

Lower Taxa

None.