40a. Epilobium glaberrimum subsp. glaberrimum
Epilobium madrense S. Watson; E. pruinosum Haussknecht
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.
Flowering Jun–Oct. Well-drained, gravelly soils, seepage areas, damp meadows, stream banks, roadside ditches, mainly lower to mid montane; (150–)300–2800(–3300) m; Ariz., Calif., Idaho, Nev., Oreg., Utah, Wash.; Mexico (Baja California, Chihuahua).
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.
