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bog bilberry, bog blueberry

Habit Shrubs deciduous, 0.2–0.7 m, in dense mats; stems round in cross section; twigs round in cross section to angled, green to grayish brown, glabrous to finely puberulent, older twigs slightly peeling; rhizomatous.
Leaves

ovate to elliptic, 9–29 × 4–18 mm; thin or thick at maturity;

margins entire;

tips rounded to acute;

surfaces abaxially glabrous or glaucous, adaxially glabrous.

Inflorescences

racemes, 2–4-flowered, occasionally 1-flowered.

Flowers

distinct;

sepals 4 or 5, usually glaucous;

corollas urceolate, 4–6 × 2–5 mm, white to pink, glaucous;

petals 4 or 5;

filaments ? anthers, glabrous.

Fruits

4–9 mm in diameter, blue to bluish black, with a faint bloom.

2n

=24, 48, 72.

Vaccinium uliginosum

Distribution
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[BONAP county map]
Discussion

Wet mid-elevation montane and coastal habitats. Flowering May–Sep. 0–2400 m. BW, Casc, ECas, Est, Sisk. CA, ID, NV, WA; northern US and Canada; Asia, Europe. Native.

Some authorities consider the coastal form of V. uliginosum a distinct species (V. occidentale). If recognized, this species would be identified by its distinctly reticulated leaf veins, thin leaves, and smaller fruits.

Source Flora of Oregon, volume 2, page 642
Stephen Meyers
Sibling taxa
V. caespitosum, V. corymbosum, V. deliciosum, V. macrocarpon, V. membranaceum, V. myrtillus, V. ovalifolium, V. ovatum, V. oxycoccos, V. parvifolium, V. scoparium
Synonyms Vaccinium occidentale, Vaccinium uliginosum ssp. occidentale, Vaccinium uliginosum var. alpinum, Vaccinium uliginosum var. uliginosum
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