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 ovalifolium.= PRIMULACEAE, the Primrose Family Herbs, with alternate or opposite simple leaves and regular flowers; petals more or less united; stamens attached one in front of each petal; ovary 1-celled with 1 style. 1a. Leaves all basal; flowers on leafless stalks --2. 1b. Stem-leaves present --5. 2a. Flowers nodding, the petals reflexed (3-6 dm. high; flowers showy, white or pink, in spring) =Shooting Star, Dodecatheon meadia.= 2b. Flowers erect or spreading; petals not reflexed --3. 3a. Corolla not longer than the calyx; flowers small and inconspicuous (1 dm. high; flowers white or pink, spring) =Androsace, Androsace occidentalis.= 3b. Corolla conspicuous, much longer than the calyx (flowers pink or purple, summer) (Primrose) --4. 4a. Leaves white-mealy beneath (1-4 dm. high) =Primrose, Primula farinosa.= 4b. Leaves green beneath (2 dm. high or less) =Primrose, Primula mistassinica.= 5a. All the stem-leaves in one whorl just below the flower-cluster --6. 5b. Stem-leaves several or many, scattered over the stem --7.