The accolade elm is a hybrid of the species Ulmus japonica and Ulmus wilsoniana. The hybrid was introduced to take place of the American elm, whose population saw a huge decline with the introduction of Dutch elm disease. The species branching mimics the graceful arches found in the American elm. The species’ leaves are elliptical in shape and are between 2-4 inches; they are arranged alternately and have pinnate venation. The leaves have serrated edges and are forest green color. The fruit is brown, dry and oval.
The Amur corktree is a medium sized tree 30-45’ in height. They have compound leaves with 5-11 elliptical leaflets. The upper surface of the leaf is a dark green while the lower surface is a lighter green. If crushed the leaves smell of turpentine. Cork-like bark with ridges that becomes more prominent with age. Small yellow flowers open in May and June. The fruits are clusters of pea-sized berries that mature to black in October.
Black gum has ellipsoid simple leaves with a shiny luster. Fall color is full of reds and purples. Trees are male or female. The purple, paired fruits contain a large single seed. The fruit pulp is oily and consumed by migrating birds that need to refuel. Southern Nyssa has fragrant small flowers that are desired by both honeybees and bee keepers.
Colorado blue spruce is a beautiful species and one of the most popular ornamental conifers in the United States. Colorado blue spruce has magnificent blue-green color with a silver shimmer. They mature to be 50-75’ feet tall. Stiff evergreen needles are ½- 1 inch long and silvery green-blue in color. The needles surround the branches at right angles, when crushed the needles give off a pungent resinous odor. Seed cones, are 3-4 inches in length and light brown. They hang downward on the branches and are concentrated at the crown of the tree. The tallest Colorado blue spruce recorded in the United States was 100 feet tall and found in Wyoming.
Dawn Redwoods grow to be over 100 feet tall with a spread of about 25 feet at full maturity. The leaves are opposite and a fresh green color in spring in the fall the needles fade to a burnt-orange, red-brown color, older specimen form wide buttresses on the lower trunk. Dawn Redwoods produce conesbetween 1.5 and 2.5 cm in diameter arranged in opposite pairs in four rows.
English oaks are large deciduous trees. Their leaves are an olive green color, lobed, short-stalked leaves 7-14 cm long. The leaves are arranged alternately and have an ear-shaped (auriculate) leaf base. English oaks flower in spring and their fruit, the acorn, is ripe by fall. The acorns are positioned on a peduncle (acorn stalk) with 1-4 acorns on each peduncle. The bark is ridged grey. The largest English oak in New York State is located in Nassau county and stands at 88 feet.
The Ginkgo can reach to be up to 40 meters in height with irregular branching. The leaves are a beautiful green and fan shaped with two or more lobes which account for the Latin name biloba (two lobes). The leaves turn a golden yellow before hitting the ground for the winter. Ginkgo are long-lived trees, the oldest recorded Ginkgo tree was 3,500 years old.
Leaves of Green Ash are opposite, pinnately compound, and have 5 to 9 leaflets which are dark green in color. It is a dioecious species, meaning the male and female flowers are on separate trees. Samaras hang in clusters from female trees. The young bark of Green Ash is usually flaky but a diamondback pattern appears on the bark after maturity.
Honey locust is a large, pollution-tolerant, shade tree. Its pinnate-compound leaves alternate on branches. The species is polygamo-dioecious; meaning the male and female flowers are found on separate trees, but each tree also has some perfect flowers (both male and female). Species produces twisting pods up to 1.5 inches long, changing from yellow green to dark brown-red at maturity and contain many hard seeds. Young bark is smooth, tan-grey and soon becomes fissured with an orange interior bark; the species has intimidating, large, branched thorns on its trunk.
The peeling of the bark creates a mosaic pattern of gray, green, and cream on its trunk. Its leaves are broad and like the scientific name describes the leaves are broad and maple like in look. The leaves are a deep green on one side and a faded green on the other; they are large, tough leaves, they are wider than they are long and lobed like maples. The petiole base encloses the lateral bud that is only revealed once the leaf falls. Although London plane trees resemble maples, the plane tree has alternating leaves whereas maples are opposite. In April the tree flowers, the fruit is a deep red round ball about one inch in diameter which contain compacted seeds.