Salix columbiana

Shrubs, 2–6.5 m. Stems: branches red-brown, glabrous or hairy at nodes; branchlets yellow-brown or red-brown, pubescent, puberulent, or glabrous, (hairs appressed, straight or wavy). Leaves: stipules usually absent or rudimentary, sometimes foliaceous on early ones (apex acute), rudimentary or foliaceous on late ones; petiole 2–5 mm, short-silky adaxially; largest medial blade (sometimes hypostomatous, glands marginal), linear or very narrowly elliptic, 58–115 × 5–17 mm, 5.7–12.8 times as long as wide, base acute or cuneate, margins flat to slightly revolute, remotely spinulose-serrulate or sinuate, apex acuminate, abaxial surface glaucous (sometimes obscured by hairs), sparsely to very densely short- or long-silky, hairs appressed to slightly spreading, straight, adaxial dull, pubescent or long-silky; proximal blade margins entire or remotely denticulate; juvenile blade color obscured by hairs, densely short-silky abaxially. Catkins: staminate 20–83 × 5–13 mm, flowering branchlet 6–125(–200) mm; pistillate densely to moderately densely flowered, slender or stout, 35–90 × 5–12 mm, flowering branchlet 11–160 mm; floral bract 1.4–4 mm, apex acute, rounded, retuse, or truncate, entire or toothed, abaxially hairy throughout or proximally, hairs straight or wavy. Staminate flowers: abaxial nectary 0.3–0.9 mm, adaxial nectary narrowly oblong, oblong, ovate, or flask-shaped, 0.5–1 mm, nectaries distinct or connate and shallowly cup-shaped; filaments hairy on proximal 1/2, throughout, or basally; anthers 0.8–1.3 mm. Pistillate flowers: (abaxial nectary 0.3–0.4 mm), adaxial nectary narrowly oblong, ovate, or flask-shaped, 0.4–1.3 mm, longer than stipe, nectaries distinct or connate and shallowly or partially cup-shaped; stipe 0.2–0.7 mm; ovary pyriform, long-silky, beak abruptly tapering to styles; ovules 18–30 per ovary; styles 0.1–0.2(–0.4) mm; stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, (0.3–)0.5–1.1 mm. Capsules 3.4–5.6 mm. 2n = 38.

Phenology: Flowering May-late Jul.
Habitat: Riparian, sandy-silty to sandy gravel floodplains, old beach dunes, rocky fill along streams
Elevation: 5-40 m

Distribution

• Generated Map
• Legacy Map

Oreg., Wash.

Discussion

Hybrids:

Salix columbiana forms natural hybrids with S. exigua var. exigua and S. sessilifolia. Both hybrids are reported from Oregon and Washington (R. D. Dorn 1998).

Selected References

None.

Lower Taxa

None.