BEAUTIFUL BIRCH BARK
Five kinds of birch tree species in northeastern North America include black, yellow, gray, paper and river birches. The beautiful bark of these birches is most noticeable and enjoyable in winter when the trees are devoid of foliage. Being related, these birches have several traits in common, other than attractive bark. They are all trees on the small side. Male and female flowers are on each tree in all these species, and open in spring. Male blooms, (catkins) dangle two to three inches from twigs and sway gracefully in the wind that also disperses their pollen to female blossoms. Female flowers are upright and one inch tall. And each female bloom, when pollinated, produces a stack of tiny, two-winged seeds that blow away on the wind. Each type of birch tree has its own niche, which spreads the species, and almost eliminates competition for space in the sun. Bl...