arboretum tour Native trees- botany 410 Preview

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18. Alaska Cedar – Chamaecyparis nootkatensis (this is a cedar and is the only cedar-like tree in this area)

commonly with pendulous branches. The foliage is in flat sprays, with dark green, 3–5 mm long scale-leaves. The cones have 4 (occasionally 6) scales each scale has a pointed triangular bract about 1.5–2 mm long

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19. Ponderosa Pine – Pinus ponderosa (look for a large tree with slightly yellowing bark)

Needles are 5 to 10 inches long and in bundles/fasicles of three, forming tufts at the end of each branch. Cones are oval, 3 to 6 inches long and 2 to 4 inches in diameter, with outwardly curved spines that make them prickly to handle. Bark is dark brown and rough textured in young trees and orange-brown with distinctive large plates in mature trees

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20. Western Red Cedar – Thuja plicata (there is a stand of these in a row)

foliage forms flat sprays with scale-like leaves in opposite pairs, with successive pairs at 90 degrees to each other. The foliage sprays are green above and green marked with whitish stomatal bands below; they are strongly aromatic, with a scent reminiscent of pineapple when crushed. cones are slender, 10 to 18 mm (0.39 to 0.71 in) long, and 4 to 5 mm (0.16 to 0.20 in) broad, with 8 to 12 thin, overlapping scales. They are green to yellow-green, ripening brown in fall about six months after pollination, and open at maturity to shed the seeds

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Douglas Fir- Psedotsuga menziesii

Needles are yellowish-green, 1-inch-long and arranged in a spiral around the branchlets, like a bottlebrush. Cones are oblong, 2 to 4 inches long with three-pointed bracts and are located primarily in the upper crown. Bark on young trees is thin, smooth, and gray, with numerous resin blisters. On mature trees the bark is thick (4 to 12 inches) and corky

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22. Vine Maple – Acer circinatum

grows as a large shrub growing to around 5 to 8 metres (16 to 26 ft) tall, but it will occasionally form a small to medium-sized tree leaves are opposite, and palmately lobed with 7 to 11 lobes, almost circular in outline, 3 to 14 centimetres (1.2 to 5.5 in) long and broad, and thinly hairy on the underside; the lobes are pointed and with coarsely toothed margins. The leaves turn bright yellow to orange-red in fall.

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23. Larch – Larix occidentalis (there is a group of these together- look for needles turning yellow as this species is the only native pine that is deciduous)

shoots are dimorphic, with growth divided into long shoots (typically 10 to 50 centimetres (3.9 to 19.7 in) long) and bearing several buds, and short shoots only 1 to 2 millimetres (0.039 to 0.079 in) long with only a single bud. The leaves are needle-like, light green, 2 to 5 centimetres (0.79 to 1.97 in) long, and very slender; they turn bright yellow in the fall, leaving the pale orange-brown shoots bare until the next spring. seed cones are ovoid-cylindric, 2 to 5 centimetres (0.79 to 1.97 in) long with a papery bract sticking out of the cone

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24. Garry oak – Quercus garryana (there are a few of these together)

drought-tolerant tree, typically of medium height, growing slowly to around 20 m leaves are deciduous, 5–15 cm long and 2–8 cm broad, spirally arranged alternate leaves, with lobate margins with 3-7 deep lobes on each side. The flowers are catkins, the fruit a small acorn 2–3 cm (rarely 4 cm) long and 1.5–2 cm broad, with shallow, scaly cups

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25. White Pine – Pinus monticola

leaves ('needles') are in fascicles (bundles) of five, with a deciduous sheath. The needles are finely serrated, and 5–13 centimetres (2.0–5.1 in) long. The cones are long and slender, 12–32 centimetres (4.7–12.6 in) long and 3–4 centimetres (1.2–1.6 in) broad (closed) Western white pine (Pinus monticola) has been seriously affected by the white pine blister rust (Cronartium ribicola), a fungus that was accidentally introduced from Europe in 1909. The United States Forest Service estimates that 90% of the Western white pines have been killed