The species often propagates thro… Wood: Heartwood reddish-yellow; sapwood almost white; soft, light, fairly weak or brittle, and prone to breakage (e.g., during storms); used to make match sticks and for pulpwood. You are here: Home > Blog > A Guide to Tree Identification > Aspen. Landscape Use: Rarely used and cultivars are not available, but it is a good, large cottonwood that would be worth having in the right setting. The trees have tall trunks, up to 25 meters (82 feet) tall, with smooth pale bark, scarred with black. Aspen is dioecious: trees are either male or female and produce their flowers or catkins in March or April, before the leaves appear. Zones 3-9. Flowers/fruit: Dioecious. Wood: Fairly unimportant. Terminal buds 3/4" long, pointed, shiny-brown, resinous, fragrant when crushed. Golden fall color is occasionally nice. Cottonwoods and willows can easily be propagated by taking 10" or longer cuttings off of young branches in the winter and planting them in the spring with about an inch showing above ground. Bark: Light green, smooth on young trunks; on older trunks thick, gray, deeply furrowed with flat-topped ridges. Leaves: Lanceolate to ovate-lanceolate; 2" to 4" long, 1/2" to 1-1/2" wide; narrowest leaf of the cottonwoods found in Utah; long, tapered apex; deciduous; finely to coarsely serrate; petiole short (less than 1/3 length of blade) and not flattened laterally. On young suckers (ramets), the leaves may be more triangular in shape. The aspen (Populus tremuloides) is an iconic keystone tree species, and its mixed understory supports a diverse ecosystem throughout the higher elevations of the Rocky Mountains. General: Native in from western Great Plains through the Intermountain West from Mexico to Canada, including most of Utah. Terminal bud more or less woolly. Landscape Use: Over-planted in Utah; also found where homes are built into native aspen areas. Most of these aspen species’ trees are accustomed to cold climates and regions where even the summers are relatively cooler than in other parts of the world. Terminal bud 1/4" to 1/2" long, sharp-pointed, sometimes resinous, covered by red-brown overlapping scales; lateral buds smaller, curve inward. In Spring, when the leaves open - they have a browny-copper colour. Other Forestry Related USU Extension Pubs. All the trees in an area may be joined together through the root system and are, in consequence, clones (a group of genetically identical organisms). They are, therefore, all the same sex, and come into flower and leaf at the same time. The bark of Aspen trees does not peel off. Usually found naturally along streams. It thrives on a wide variety of sites, from shallow rocky or clay soils to rich, sandy soils. Bark: Green-white to bright white; with dark cracks and ridges when older; very characteristic. Fruit an oval capsule, 1/4" long, several together on a slender stalk like a string of beads; seeds tufted, small, light brown. Zones 2-5. A large tree, grows rapidly in favorable locations, also thrives under less favorable conditions. Aspen trees naturally grow in groves, rather than as individual trees. Leaves: Alternate; simple; often resembles a maple leaf in shape with very coarse teeth or lobes on margin; base rounded; 1" to 4" long; deciduous; dark green and glabrous above; white and woolly beneath; petioles hairy, 1/2" to 1-1/2" long, not flattened laterally. Bark: Smooth and light yellow-green when young, becoming shallowly furrowed on older trunks. If grown at low elevations, avoid problems with older, larger trees by managing selected aspen sprouts in a large, mulched bed; remove stems before they get very large. The resulting tree is genetically identical to the original. ); at any rate uncommon. Landscape Use: Not planted and no cultivars available. These deciduous trees are mostly medium-sized aspens growing to heights of 49 to 98 ft. Landscape Use: Planted in the past around farms and ranches and still sometimes seen in those locations, even if abandoned. Leaves: Deltoid to kidney-shaped; 3" to 6" long, 4" to 5" wide; deciduous; rounded teeth on margin; pointed, short apex; glabrous; turn bright gold in fall; petiole 1-1/2" to 3" long, flattened laterally, causing leaf to flutter in the wind. As Aspen has an extensive root system, ramets may appear 40 yards away from the parent tree. General: Some sources show this as native to extreme northeast Utah (confused with black cottonwood? Twigs/buds: Twigs slender; green-gray; covered with fine white hairs. Zones 5-9. It is more common in the north of Britain than the south. Aspen is a common name for certain tree species; some, but not all, are classified by botanists in the section Populus, of the Populus genus. The number of ramets produced after a fire can be prodigious (up to 70,000 per hectare!). General: Native from about the Wasatch Front south including lower-elevation river drainages (Green and Colorado) in southern Utah and throughout the Southwest. As Aspen has an extensive root system, ramets may appear 40 yards away from the parent tree. General: Some sources show this as native to extreme northern Utah; at any rate uncommon. In many areas, Aspen reproduces mainly vegetatively or asexually by means of suckers or ramets. Best grown in cooler high-mountain climates that it is used to. The glossy green leaves, dull beneath, become golden to yellow, rarely red, in autumn. Utah's most common native cottonwood. Aspen trees are sometimes referred to as aspen poplars. Leaves: Ovate to ovate-lanceolate; rounded base and angled; 3" to 6" long, 3" to 4" wide; acute to acuminate apex; rounded base; finely serrate margin; dark green above, paler beneath; petiole round, slender, long. Some cultivars are available, but plant only in large, open areas where a troublesome tree will be less trouble. Leaves: Ovate to lanceolate; 3" to 6" long, 2" to 4" wide; pointed tip; rounded base; finely serrate margin; dark green above, paler beneath; petiole round, slender, long. Very shade intolerant. Leaves: Simple; alternate; round to broadly ovate; 1-1/2" to 3" diameter; deciduous; finely serrate margin; acute apex; glabrous; yellow-green to green, turning bright yellow to orange in fall; petiole 1-1/2" to 3" long, flattened laterally, causing leaf to flutter in the wind. The leaves are usually rounded (though there is a point at the leaf apex), with a few ‘rounded’ teeth on the margin. Fertilised female catkins ripen during the summer and release minute seeds, which have small hairs or tufts. Generally forms single aged stands through root sprouts after a fire or other disturbance; grows in clumps or "clones" that are genetically identical since stems are all attached to the same root system. Terminal bud 1/4" to 3/4" long, sharp-pointed, resinous and aromatic, covered by brown overlapping scales. This means that virtually all the trees in a clone are connected. Twigs/buds: Twigs slender; round; glabrous; yellow-green when young and light gray when older. Many root suckers (sprouts) occur around the tree. General: Native to Europe. The bark is grey or green grey in colour, sometimes pitted or roughened by the presence of lenticels. One common hybrid is lanceleaf cottonwood (Populus x acuminata), a cross between P. angustifolia and either P. deltoides, P. fremontii, or P. balsamifera. In grows from northern Alaska to Labrador and south into Mexico. They are, therefore, all the … The leaf stalks (petioles) are unusual as they are quite long and have a somewhat flattened or compressed appearance in cross section. In many cases, the quaking aspen will grow in pure stands of many trees. © 2020 Woodland Investment Management Ltd | Birch – the bark of young trees is a chalky white, but as it ages it becomes furrowed and brown. Wood: Unimportant and seldom used. Flowers/fruit: Fruit a capsule; narrow conical; 1/4" long; gray and hairy; seeds small, tufted, light brown. In Utah, where it serves as the state tree, … Learn more aspen tree information, including how to care for aspen trees in landscapes in the following article. Landscape Use: Rarely used and no cultivars are available. Aspen holds the title of largest living organism. Aspen (Populus tremula) has a very wide distribution, being found from Scandinavia to North Africa, and across most of Europe. Estimate the size of the tree. Privacy Policy | Bark: Smooth; green-white to cream colored; becomes furrowed on older trunks. Some cultivars are available, but plant only in large, open areas where a troublesome tree will be less trouble. These are shoots produced by old roots. Golden fall color is occasionally nice. ... An aspen tree is the most widely distributed tree species in North America,... 02.
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