Epilobium glaberrimum subsp. glaberrimum
Stems 20–75(–85) cm, sometimes sparsely strigillose distally, without lines. Leaf blades usually light green, very narrowly lanceolate to lanceolate or narrowly elliptic, (2–)3–7.2 × 0.5–1.6 cm, length/width ratio more than 4. Flowers: floral tube 0.7–2.3 × 1.4–2.5 mm; sepals 3–7.5 × 1–1.7 mm; petals usually pink to rose-purple, rarely white, (4–)5–10(–12) × 2–4.5(–5) mm; filaments of longer stamens 3–5.5(–6) mm, those of shorter ones 1.4–4 mm; ovary 19–42 mm, style 1.7–5(–7) mm. Capsules 45–75 mm. 2n = 36.
Phenology: Flowering Jun–Oct.
Habitat: Well-drained, gravelly soils, seepage areas, damp meadows, stream banks, roadside ditches, mainly lower to mid montane.
Elevation: (150–)300–2800(–3300) m.
Distribution
Ariz., Calif., Idaho, Nev., Oreg., Utah, Wash., Mexico (Baja California, Chihuahua).
Discussion
Subspecies glaberrimum extends into mountainous areas of Baja California and Chihuahua, Mexico, much farther south than subsp. fastigiatum, which in turn occurs much farther north.
Selected References
None.