4a. Eremothera boothii subsp. boothii
[E]
Sphaerostigma lemmonii A. Nelson; S. senex A. Nelson
Herbs villous and glandular puberulent, especially in inflorescence. Stems usually 15–60 cm. Leaves not especially clustered toward base, mostly evenly distributed, 1–6 × 0.6–2.2 cm; petiole 0.1–2.6 cm; blade narrowly lanceolate, narrowly ovate, or ovate to elliptic, margins coarsely serrulate to sinuate-toothed. Inflorescences ± open. Flowers: floral tube 4–8 mm; petals white, 3.5–9 mm. Capsules slightly curved outward to contorted, 1.3–1.9 mm diam. near base. Seeds dimorphic.
Flowering Jun–Aug. Sandy flats, steep loose slopes, sagebrush shrublands, Joshua tree and pinyon-juniper woodlands; 900–2400 m; Ariz., Calif., Idaho, Nev., Oreg., Wash.
Subspecies boothii is known from northwest Arizona; east-central California and west Nevada; south Idaho, east Oregon, south and east Washington.
Subspecies boothii intergrades broadly with subspp. alyssoides and intermedia in the Nevada portion of its range.
