w shrubs 10-15 cm. high, erect from a creeping rootstock;
leaves with the taste of wintergreen (flowers white or pink,
summer) =Wintergreen, Gaultheria procumbens.=

24b. Bushy shrubs 3-8 dm. high; leaves dotted beneath with
yellowish resinous dots; ovary 10-celled (flowers
greenish-pink, spring) =Huckleberry, Gaylussacia baccata.=

24c. Shrubs 1 dm. to 3 m. high; leaves not resinous-dotted beneath;
ovary 5-celled (flowers white or greenish-pink, spring or
early summer) --25.

25a. Corolla bell-shape, the stamens projecting beyond it (5-15 dm.
high) =Deerberry, Vaccinium stamineum.=

25b. Corolla cylindrical or urn-shape, the stamens not projecting --26.

26a. Filaments hairy (Blueberry) --27.

26b. Filaments glabrous (Bilberry) --32.

27a. Low bushy shrubs, usually less than 5 dm. and never more than 1 m.
high --28.

27b. Tall erect shrubs, 1-4 m. high --31.

28a. Foliage pubescent =Blueberry, Vaccinium canadense.=

28b. Foliage glabrous --29.

29a. Leaves pale-green and glaucous, entire or nearly so
=Blueberry, Vaccinium vacillans.=

29b. Leaves bright-green, distinctly serrulate --30.

30a. Fruit blue =Blueberry, Vaccinium pennsylvanicum.=

30b. Fruit black
=Blueberry, Vaccinium pennsylvanicum var. nigrum.=

31a. Leaves downy beneath; fruit black
=Blueberry, Vaccinium atrococcum.=

31b. Leaves smooth or minutely pubescent beneath; fruit blue
=Blueberry, Vaccinium corymbosum.=

32a. Full-grown leaves less than 2.5 cm. long; low much-branched
shrubs, mostly less than 5 dm. high --33.

32b. Full-grown leaves more than 2.5 cm. long; shrubs usually a
meter high or more --34.

33a. Leaves entire; petals usually 4.
=Bilberry, Vaccinium uliginosum.=

33b. Leaves finely serrulate; petals 5
=Bilberry, Vaccinium caespitosum.=

34a. Leaves serrulate, green beneath, acute; corolla globular
=Bilberry, Vaccinium membranaceum.=

34b. Leaves entire, pale beneath, obtuse; corolla ovoid
=Bilberry, Vaccinium o