Sphaerostigma hallii Davidson, Muhlenbergia 3: 107. 1907; Camissonia pallida (Abrams) P. H. Raven subsp. hallii (Davidson) P. H. Raven; Oenothera bistorta Nuttall ex Torrey &A. Gray var. hallii (Davidson) Jepson; O. hallii (Davidson) Munz

Flowers: floral tube 3.8–4.2 mm; sepals 4.8–8 mm; petals with 1–3 red dots basally, 6.5–13 mm; episepalous filaments 3–6.5 mm, epi­petalous filaments 1.8–3.8 mm, anthers 1.5–2.2 mm; style 6.5–10.5 mm. 2n = 14.

Flowering Mar–May(–Jun). Sandy washes; of con­servation concern; 30–1400 m; Calif.

Subspecies hallii occurs in Riverside and San Bernardino counties, from Banning east throughout the Little San Bernardino Mountains and their northern slopes and southeast to the vicinity of Mecca and Box Canyon.