Leaves: stipules foliaceous, apex rounded; petiole (1–) 4–15 mm, with pairs or clusters of spherical glands distally; largest medial blade amphistomatous, lorate, very narrowly elliptic, narrowly elliptic, or narrowly lanceolate to lanceolate, base convex, abaxial surface not glaucous, pilose, hairs white and ferruginous, straight or curved, (secondary-veins protruding abaxially, impressed adaxially). Catkins: staminate (stout), 24–50 × 8–15 mm, flowering branchlet 3–27 mm; pistillate moderately densely flowered, slender or stout, 30–63 (–70 in fruit) × 9–15 mm, flowering branchlet 10–30 mm; floral bract 2.8–4 mm. Staminate flowers: abaxial nectary (0–) 0.4–0.8 mm, adaxial nectary 0.3–0.6 mm, nectaries often distinct, sometimes connate and shallowly cupshaped. Pistillate flowers: (abaxial nectary rarely present, then nectaries distinct or connate and shallowly cupshaped), adaxial nectary 0.2–0.5 mm; stipe 0.8–4 mm; ovules 28–30 per ovary; styles 0.2–0.6 mm. 2n = 76.

Phenology: Flowering late May-late Jun.
Habitat: Riparian thickets, openings in woods, silty, sandy to gravelly alluvium, along streams, wet meadows, lakeshores
Elevation: 30-3100 m

Distribution

• Generated Map
• Legacy Map

Alta., B.C., N.W.T., Sask., Yukon, Alaska, Calif., Colo., Idaho, Mont., Nev., Oreg., S.Dak., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.