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Thuja are evergreen trees growing from 10 to 200 feet (3 to 61 metres) tall, with stringy-textured reddish-brown bark. The shoots are flat, with side shoots only in a single plane. The leaves are scale-like and 1 to 10 mm (0.039 to 0.394 in) long, except young seedlings in their first year, which have needle-like leaves.
Large trees that exhibit deformed growth and distinctive forms bent in a vertical plane are sometimes labeled trail trees, marker trees, thong trees, or signal trees by enthusiasts. Historically, these unique trees were commonly known as Indian trail trees. Proponents of trail tree lore claim these unique forms are culturally modified trees ...
Dendrolycopodium obscurum is known for the superficial resemblance of its sporophyte to various conifers. However, its above-ground parts are rarely more than 15 cm (6 inches) tall. Its main stem is actually a subterranean, creeping rhizome, which grows about 6 cm (2.4 inches) below ground. Several aerial shoots branch off of the rhizome, which ...
Thuja occidentalis, also known as northern white-cedar, [ 1 ]eastern white-cedar, [ 2 ] or arborvitae, [ 2 ][ 3 ] is an evergreen coniferous tree, in the cypress family Cupressaceae, which is native to eastern Canada and much of the north-central and northeastern United States. [ 3 ][ 4 ] It is widely cultivated as an ornamental plant.
Sorbus americana is cultivated as an ornamental tree, for use in gardens and parks. It prefers a rich moist soil and the borders of swamps, but will flourish on rocky hillsides. A cultivar is the red cascade mountain-ash, or Sorbus americana 'Dwarfcrown'. It is planted in gardens, and as a street tree. [10]
A crop of seeds is generally produced every year with a bumper crop often occurring every second year. A single tree between 5 and 20 cm (2.0 and 7.9 in) in diameter can produce between 12,000 and 91,000 seeds in a season. A tree 30 cm (0.98 ft) in diameter was shown to produce nearly a million seeds. [8]
Populus tremuloides is a deciduous tree native to cooler areas of North America, one of several species referred to by the common name aspen.It is commonly called quaking aspen, [2] [3] [4] trembling aspen, [2] [3] American aspen, [3] mountain or golden aspen, [5] trembling poplar, [5] white poplar, [5] and popple, [5] as well as others. [5]
It is a deciduous shrub growing to 8 m tall, with stems up to 10 cm diameter. The bark is gray, smooth, and lightly fissured. The twigs are dark purplish-brown, slender, sometimes four-angled or slightly winged. The leaves are opposite, elliptical, 8.5–11.3 cm long and 3.2–5.5 cm broad, abruptly long pointed at the tip, and with a finely ...