Epilobium glaberrimum subsp. fastigiatum

(Nuttall) Hoch & P. H. Raven

Ann. Missouri Bot. Gard. 71: 342. 1984.

Basionym: Epilobium affine var. fastigiatum Nuttall in J. Torrey and A. Gray Fl. N. Amer. 1: 489. 1840
Synonyms: E. concinnum Congdon E. fastigiatum (Nuttall) Piper E. glaberrimum var. fastigiatum (Nuttall) Trelease ex Jepson E. glaberrimum var. latifolium Barbey E. platyphyllum Rydberg
Treatment appears in FNA Volume 10.

Stems 5–35 cm, sometimes sparsely strigillose and glandular puberulent distally, rarely with faint raised strigillose lines decurrent from margins of distal petioles. Leaf blades usually blue-green, lanceolate to narrowly ovate or elliptic, (0.5–)1–3.4 × (0.3–)0.7–1.8 cm, length/width ratio less than 4. Flowers: floral tube 0.9–1.4 × 1–2.2 mm; sepals 2.5–5.2 × 0.8–1.6 mm; petals rose-purple to pink, 3.4–8 × 1.8–3.9 mm; filaments of longer stamens 2.4–5 mm, those of shorter ones 1.6–3 mm; ovary 10–34 mm, style 2.2–3.6 mm. Capsules 15–45(–55) mm. 2n = 36.


Phenology: Flowering Jun–Sep.
Habitat: Rocky, well drained soil, moist alpine slopes, seepage, talus slope, stream banks, bogs, mainly upper montane to alpine.
Elevation: (1000–)1200–3500 m.

Distribution

Alta., B.C., Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Subspecies fastigiatum occurs primarily along the Sierra Nevada-Cascade axis, but also ranges through the Basin Ranges to the Rocky Mountains from northern Wyoming to southern Alberta and British Columbia.

Selected References

None.

Lower Taxa

None.
Peter C. Hoch +
(Nuttall) Hoch & P. H. Raven +
Epilobium affine var. fastigiatum +
Alta. +, B.C. +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
(1000–)1200–3500 m. +
Rocky, well drained soil, moist alpine slopes, seepage, talus slope, stream banks, bogs, mainly upper montane to alpine. +
Flowering Jun–Sep. +
Ann. Missouri Bot. Gard. +
E. concinnum +, E. fastigiatum +, E. glaberrimum var. fastigiatum +, E. glaberrimum var. latifolium +  and E. platyphyllum +
Epilobium glaberrimum subsp. fastigiatum +
Epilobium glaberrimum +
subspecies +