Abundant throughout the region at the lower altitudes in bogs and swamps; flowering during June. VACCINIACEÆ _Huckleberry Family_ Shrubs or small trees with alternate leaves and small perfect flowers; calyx tube adnate to the ovary, 4—5-lobed or cleft; corolla 4—5-lobed, rarely divided into single petals, deciduous; stamens twice as many as the corolla lobes, inserted at the base; filaments mostly short; anthers attached on the back 2-celled; fruit a globose berry or drupe. Swamp-Laurel.] Erect deciduous shrubs; corolla cylindric or urn-shaped, white, pink or greenish. =Vaccinium.= Low evergreen shrub; corolla open-campanulate, pink; berry red. =Vitis-Idæa.= Trailing or creeping evergreen shrubs. Corolla short-campanulate, white; berry white. =Chiogenes.= Corolla with spreading curved petals, pink; berry red. =Oxycoccus.= [Illustration: Menziesia ferruginea Smith. (½ Nat.) Menziesia.] [Illustration: Kalmia microphylla (Hook.) Heller. (⅔ Nat.) Dwarf [Sidenote: =Vaccinium cæspitosum= Michx. _Dwarf Bilberry._] A shrub 3—7 inches high, much branched and nearly smooth throughout. Leaves obovate or oblong, cuneate, obtuse or acute, green and shining on both sides, nearly sessile, serrulate, with close bluntish teeth. Flowers white or pink, small bell-shaped, ⅛ of an inch long, mostly solitary in the axils and longer than their drooping pedicels; berry ¼ of an inch or more in diameter, blue with a bloom. On slopes and in alpine meadows throughout the Rockies at the higher altitudes; flowers appearing with the leaves in early June. [Sidenote: =Vaccinium erythrococcum= Rydb. _Alpine Bilberry._] Stems erect with numerous slender, strict, green branches and branchlets, 3—18 inches high. Leaves ovate or oval, ½ an inch long or less, bright green. Flowers ovate, ⅛ of an inch long, white or pink, 5-lobed, solitary in the axils of the leaves; berries small, bright red. On slopes and in alpine meadows throughout the Rockies at the higher altitudes; flowering during June. [Sidenote: =Vaccinium ovalifolium= Smith. _Blueberry._] A straggling branched shrub, 3—12 feet high, the branches slender, twigs smooth, joints sharply angled. Leaves oval, short-petioled, smooth on both sides, green above, pale and glaucous beneath, rounded at both ends or somewhat narrowed at the base, thin, sometimes spine tipped, entire or nearly so, 1—2 inches long. Flowers commonly solitary in the axils on rather recurved pedicels; corolla pink or white, ovoid, ¼ of an inch or more long; berries blue with a bloom ½ an inch in diameter. In the beds of snow slides, occasionally in the Rockies, and abundant through the Selkirks, where it is also found in the woods; flowering in May. [Illustration: Vaccinium erythrococcum Rydb. (⅔ Nat.) Alpine Bilberry.]