Arboretum tour botany 410 -Ornamental tree Preview

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1. Sugar Maple – Acer sacharum

deciduous Tree with leaves, up to 20 cm (7.9 in) long and equally wide, with five palmate lobesThe basal lobes are relatively small, while the upper lobes are larger and deeply notched. In contrast with the angular notching of the silver maple, however, the notches tend to be rounded at their interior. The fall color is often spectacular, ranging from bright yellow through orange to fluorescent red-orange, although they look best in the northern part of its range. Sugar maples also have a tendency to color unevenly in fall. The leaf buds are pointy and brown-colored. The recent year's growth twigs are green and turn brown.

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2. Gambell Oak – Quercus gambelii (very short trees near waters edge)

leaves are generally 7–12 cm (3–4.5 in) long and 4–6 cm (1.5–2.5 in) broad, deeply lobed on each side of the central vein; the upper surface is glossy dark green, the undersurface is paler and velvety. acorns are 10–20 millimeters (0.39–0.79 in) long, and about one-third to one-half enclosed by a cap or cup (cupule); they mature in September, turning green to golden brown

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3. Norway Spruce – Picea abies (there is a stand of these just beyond the oaks)

branchlets that typically hang downwards, and the largest cones of any spruce, 9–17 cm (3 1⁄2–6 3⁄4 in) long. The leaves are needle-like with blunt tips,[5] 12–24 mm (15⁄32–15⁄16 in) long, quadrangular in cross-section (not flattened), and dark green on all four sides seed cones are 9–17 cm (3 1⁄2–6 3⁄4 in) long (the longest of any spruce), and have bluntly to sharply triangular-pointed scale tips.

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4. English Oak – Quercus robur (rounded lobes)

lobed and nearly sessile (very short-stalked) leaves 7–14 cm (2.8–5.5 in) long acorns are 2–2.5 cm (0.79–0.98 in) long, pedunculate (having a peduncle or acorn-stalk, 3–7 cm (1.2–2.8 in) long) with one to four acorns on each peduncle.

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5. Sawtooth Oak – Quercus acutissima (leaf is pointy like an arrowhead with serrated edges)

leaves are 8–20 centimetres (3.1–7.9 in) long and 3–6 centimetres (1.2–2.4 in) wide, with 14-20 small saw-tooth like triangular lobes on each side, with the teeth of very regular shape. acorn, maturing about 18 months after pollination, 2–3 centimetres (0.79–1.18 in) long and 2 cm broad, bicoloured with an orange basal half grading to a green-brown tip; the acorn cup is 1.5–2 centimetres (0.59–0.79 in) deep, densely covered in soft 4–8 millimetres (0.16–0.31 in) long 'mossy' bristles

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6. Chinkapin Oak – Quercus muelenbergii

The leaf base is typically more rounded. The veins and sinuses are regular. Acorns with no stalks or with short stalks less than 8 mm long. The acorns turn chestnut brown in the fall. The leaves have sharp teeth but no bristles

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7. Northern Pin Oak – Quercus ellipsoidalis (lobes end in fine point)

leaves are glossy green, 7–13 cm (2 3⁄4–5 in) long and 5–10 cm (2–4 in) broad, lobed, with five or seven lobes, and deep sinuses between the lobes. Each lobe has 3-7 bristle-tipped teeth. The leaf is nearly hairless, except for small tufts of pale orange-brown down where the lobe veins join the central vein. The acorns tend to be ellipsoid (ellipse-shaped, from which its scientific name derives), a third to a half covered in a deep cup, green maturing pale brown about 18 months after pollination; the kernel is very bitter. The inner surface of the acorn cap is glabrous (hairless) to sparsely or moderately pubescent, and the hairs if present tend to be kinky rather than straight

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8. Red Maple – Acer rubrum (near the bend in the pathway)

medium to large sized tree deciduous leaves arranged oppositely on the twig. They are typically 5–10 cm (2–4 in) long and wide with 3-5 palmate lobes with a serrated margin. The sinuses are typically narrow, but the leaves can exhibit considerable variation.[8] When 5 lobes are present, the three at the terminal end are larger than the other two near the base. The upper side of A. rubrum's leaf is light green and the underside is whitish and can be either glaucous or hairy. The leaf stalks are usually red and are up to 10 cm (4 in) long. Furthermore, the leaves can turn a brilliant red in autumn, but can also become yellow or orange on some individuals.

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9. Flowering Cherry – Prunus sp. (there is a stand of these just south of the Japanese garden)

leaves are simple, alternate, usually lanceolate, unlobed, and often with nectaries on the leaf stalk. The flowers are usually white to pink, sometimes red, with five petals and five sepals. There are numerous stamens. Shrubs or trees with smooth bark marked by lines (lenticels running around the stem; fruit fleshy, usually blue to black enclosing a pit or stone.

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10. Japanese maple – Acer palmatum (this is on the outer edge of the Japanese garden- small size)

Please note that there are MANY varieties of this tree- all have DEEPLY lobed leaves that can look like palm tree leaves leaves are 4–12 cm long and wide, palmately lobed with five, seven, or nine acutely pointed lobes. The flowers are produced in small cymes, the individual flowers with five red or purple sepals and five whitish petals. The fruit is a pair of winged samaras, each samara 2–3 cm long with a 6–8 mm seed.

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13. White Oak – Quercus alba

The bark is a light ash-gray and peels somewhat from the top, bottom and/or sides leaves grow to be 5 to 8.5 inches (13–22 cm) long and 2.75 to 4.5 inches (7.0–11.4 cm) wide and have a deep glossy green upper surface. They usually turn red or brown in autumn acorns are usually sessile (no stalk), and grow to 0.5 to 1 inch (13–25 mm) in length, falling in early October. Lobes are rounded not pointy

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14. Red Oak – Quercus rubra

red oak is easy to recognize by its bark, which features bark ridges that appear to have shiny stripes down the center. Alternate, seven to nine-lobed, five to ten inches long, four to six inches broad; seven to eleven lobes tapering gradually from broad bases, acute, and usually repandly dentate and terminating with long bristle-pointed teeth; the second pair of lobes from apex are largest; midrib and primary veins conspicuous.

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15. Bigleaf Oak – Quercus macrocarpa

leaves are 3–6 in (7–15 cm) long and 2–5 in (5–13 cm) broad, variable in shape, with a lobed margin. acorns are very large, 0.75–2 in (2–5 cm) long and 0.75-1.5 in (2–4 cm) broad, having a large cup that wraps much of the way around the nut, with large overlapping scales and often a fringe at the edge of the cup