Eremothera boothii subsp. boothii

Synonyms: Sphaerostigma lemmoniia. Nelson S. senex A. Nelson
Treatment appears in FNA Volume 10.

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.


Phenology: Flowering Jun–Aug.
Habitat: Sandy flats, steep loose slopes, sagebrush shrublands, Joshua tree and pinyon-juniper woodlands.
Elevation: 900–2400 m.

Distribution

Ariz., Calif., Idaho, Nev., Oreg., Wash.

Discussion

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.

Selected References

None.

Lower Taxa

None.
Warren L. Wagner +
(Douglas) W. L. Wagner & Hoch +
Oenothera boothii +
Ariz. +, Calif. +, Idaho +, Nev. +, Oreg. +  and Wash. +
900–2400 m. +
Sandy flats, steep loose slopes, sagebrush shrublands, Joshua tree and pinyon-juniper woodlands. +
Flowering Jun–Aug. +
Syst. Bot. Monogr. +
Sphaerostigma lemmoniia. +  and S. senex +
Eremothera boothii subsp. boothii +
Eremothera boothii +
subspecies +