Sharp, stiff needles give rise to its botanical name of pungens(sharp-pointed). Fruit: Paired, winged seeds (double samaras) about 1/3-inch long; usually green with reddish hues turning tan when ripe. Leaves: Slender evergreen needles are blue-green with white lines on all surfaces; 2 to 3 inches long, typically 5 in a bundle. Apply to CSU |
Often grows with ponderosa and piñon pines or on open mesas. 5 go-to trees that are perfect for Colorado Front Range gardens. Fruit: Spherical drupes about 1/4-inch diameter. Allow adequate width to keep walkways, entryways, driveways or buildings clear of overhanging branches. Wherever you live, Extension’s job is to determine what issues, concerns and needs are unique to each community, and offer sound and effective solutions. Protection. Bark: Light gray, thin and smooth on young trees; at maturity, dark brown, thick and furrowed into scaly ridges. Bark: Green-yellow and smooth while young; dark gray, thick, rough and deeply furrowed at maturity. Tricolor Beech (Fagus sylvatica) This tree thrives at elevations up to 7,000 feet, as its broad leaves provide shelter from the sun and wind. Fruit: Cylindrical, dark purple-brown cones; 2 to 3 inches long; 4-sided cone scales with stiff curved points; brown seeds with black mottling and detachable wing. Aspen trees are not the largest tree but the heart shaped leaves produce beautiful color in the fall. Colorado blue spruce* (Picea pungens) State tree, sharp stiff needles, color of needles range from bright green to silver blue Austrian pine* (Pinus nigra) Long needle pine, works well in a windbreak Concolor (white) fir (Abies concolor) Long soft … More resistant to fireblight than ‘Bechtel.’. Continental Tree Farms in Colorado Springs offers wholesale pricing for trees and shrubs including evergreens, deciduous trees, flowing trees and more. For variety, plant several kinds of trees if space allows. Relation to Fire: Typically top-killed by fire but able to sprout from the root crown following a burn. Dwarf, red buds open to white flowers, red fruit. Single or multi-stemmed tree, pink to red winged seeds in summer, yellow fall color, tolerant of alkaline soils, more adaptable than Amur maple. Employment |
These are widely grown by home gardeners looking for an easy-care fruit tree. May survive low severity fire; Top-killed by more severe fires, but may resprout. Leaves: Evergreen scalelike needles are small, gray-green or silvery. Striking, shiny, orange-red bark; white flowers, black fruit, avoid heavy soils. The ‘North Pole’ cultivar of columnar apple can grow up to a height of 8-12 feet tall and 2-3 feet wide, and is perfect for USDA hardiness zones 4-8. Relation to Fire: Resistant to fire, due to open crowns, thick, insulating bark, self-pruning branches, high moisture content in the leaves and thick bud scales. Leaves: Evergreen needles are yellow to dark green; 1 to 3 inches long; sharply pointed, stiff, stout, slightly flattened and often twisted; 2 needles per bundle. Because of their tall mature height and low, wide spread, they shouldn’t be planted along streets or anywhere they might interfere with overhead power lines. Relation to Fire: Fires virtually nonexistent in these areas due to low temperatures and a short growing season. The evergreen Columnar Blue Spruce adds a welcome pop of year-round color to foundation beds, mixed … Bark: Light gray-brown with shallow fissures which develop into furrows. Habitat: Rocky soils of moist northern slopes; in pure stands and mixed conifer forests. Leaves: Oblong, 5 to 7 lobes with deep sinuses. Yellowish-brown bark, many white flowers, thick glossy green leaves, golden-yellow fall color. Relation to Fire: Generally killed by low-intensity fires because of thin, flammable bark, shallow roots, low-growing branches and dense growing conditions. Height: 15 to 40 feet depending on growth form. Aspen, the most widely distributed tree in North America, are one of the few deciduous trees hearty enough to survive in a harsh mountain environment. Leaves: Evergreen needles are stout and light green; 1 to 1-1/2 inches long; 2 in a bundle. Serrated margins with very small teeth. Showy, white flowers in spring; red fruit in late summer; bronze fall color, stout thorns. Fruit: Shiny light brown, cylindrical cones; 2 to 4 inches long with thin, long, flexible and irregularly toothed scales; contains paired, long-winged seeds. Leaves: Leaves are dark green and glossy on top, paler on the underside; 1 to 4 inches long; up to 2 inches wide. Straight trunk, dark green leaves turn russet-red in fall, red fruit, best in well drained soils. Learn more about us or about our partners. Pink buds open to white flowers, yellow-red fruit matures to red. Fruit: Shiny, yellow-brown, egg-shaped, serotinous* cones; to 2 inches long with raised, rounded cone scales and a tiny point. Relation to Fire: Generally killed by fire due to thin bark, shallow roots, low growing branches, tendency to grow in dense stands and support heavy lichen growth. Highly drought resistant, this tree provides color to any yard – as the name implies, it produces at least 3 different colors as the seasons pass. Red buds open to semi- double pink flowers, few bronze fruit. Few thorns. Resistant to fireblight. Bark: Gray and smooth with resin blisters while young; shallow fissures and scaly when mature. Most can be used beneath power lines with little or no need for pruning to maintain clearance. Tree identification by examining images of seeds and fruits. In Colorado, it primarily occurs from December through March on young, thin-barked, deciduous trees. We have 3 regions; Peaks and Plains, Front Range and Western. Creamy panicles of fragrant flowers in late spring, red-brown shredding bark. Habitat: Found in floodplains, bordering streams, near springs and in moist woodlands; pure stands or with willows. These deciduous cones fall apart when mature so they are rarely found on the ground. Bark: Green-white, smooth and thin with raised dark patches; on very large trees, trunk base is often gray, thick and furrowed. Fruit: Upright, cylindrical, very dark purple, 2 to 4 inches long in the upper part of the crown; fine, hairy, cone scales; long, broad-winged seeds. 9/92. Remove soil from the top of the rootball to expose the root flare, if not visible. Water. Relation to Fire: The resinous wood is very flammable. Match the plant with the moisture conditions of the site. Low-moisture trees planted in an irrigated lawn grow too fast. We are a service and outreach agency of the, Colorado State Forest Service Seedling Tree Nursery’s page. Dark red persistent fruit. Most closely tied to drainages in arid zones; also occurs in drier areas further north and at higher elevations. Also establishes well on burned sites from wind dispersed seeds. Purple-red leaves turn green. Habitat: Grows on rocky soils in the foothills and on the plains; often associated with piñon pines. stiff and the points extremely sharp, light green with a white stripe. Common on sites of heavy, wet soils that often flood seasonally. Relation to Fire: Severe fires can easily kill both young and mature trees. Color and texture.
M-LLarge white flowers, exfolaiting brown bark, can be tree or shrub from. Bark: Dark on young trees; nearly 3 inches thick, red-orange and furrowed into large, flat scaly plates on mature trees. Fruit: Cone-like catkin up to 1/2 inch long; green while developing; brown when ripe. Microclimate sites protected by buildings, fences and larger trees offer greater opportunities for tree selection than open, exposed locations. Equal Opportunity |
Bark: Gray to reddish-brown. Fruit: Paired, v-shaped, winged seeds (double samara); 1-1/2 inches long; in dropping clusters. Please use our website feedback form. Relation to Fire: Easily killed by fire due to thin bark, shallow roots and low branches. Purple folliage turns bronze-red. Most trees perform best in well drained soil. Relation to Fire: Typically subject to top-kill by fire; may resprout depending on the severity of the burn. Japanese Tree Lilac. In mountain environments, the brief and dry growing season often prevents aspen seeds from germinating or seedling from surviving. Large white flower clusters, crimson-purple fall color. Leaves: Evergreen needles are blue or light green with white lines; 1 to 1-1/4 inches long. Relation to Fire: Easily killed by fire, but quick to send out many sucker shoots; readily colonizes after a fire. Also common in disturbed sites; has great success in urban areas. Evergreen Columnar Trees. Very symmetrical, pyramidal evergreen native to the Rocky Mountains. Leaf stem (petiole) generally reddish. Seeds have a single, long and well-developed wing. The location you choose for each tree … Bark: Yellow-green and smooth on young trees; thick, gray-brown and furrowed with interlacing ridges at maturity. Leaves: Broad-leaf foliage is bright green above and dull green below; rounded with a pointed tip, 1 to 3 inches wide on a flattened leaf head; nearly round and sawtoothed. Colorado Conifers is a tree farm with both deciduous and conifers (aka: evergreens) available for sale. Make sure the water requirements of the tree match the conditions at your site. Fruit: Light chestnut-colored, oblong cones; 1 to 2 inches long; in upper part of crown with scales that are paper-thin and ragged along the outer edge. Fruit: Acorns, about 1 inch long with a scaled cup covering almost half. Seeds readily germinate on recently burned ground. Bark: Light gray and smooth when young; red-brown with irregular, scaly ridges when mature. To select a tree, consider the following . Colorado blue spruce (Picea pungens) State tree, sharp stiff needles, color of needles range from bright green to silver blue Austrian pine * (Pinus nigra) Long needle pine, works well in a windbreak Concolor (white) fir* (Abies concolor) Long soft blue-green needles, plant in a protected site, shade and drought tolerant Leaves range from 2 to 5 inches long; 1 to 2 inches wide. CSU Horticulture Agents and Specialists Blog, Capric Acid: A Promising Next-Generation Herbicide for Organic Specialty Crop Production, Columnar and Fastigiate Trees for CO Landscapes, Management-intensive Grazing (MiG) on Irrigated Pasture, Pulse Crops and their Key Role as Staple Foods in Healthful Eating Patterns, Integrated Hive Management for Colorado Beekeepers, Management-intensive Grazing (MiG) and Soil Health. At Heidrich’s Colorado Tree Farm Nursery our selection includes the healthiest, drought tolerant/xeric evergreen trees, deciduous trees, fruit trees, deciduous shrubs, evergreen shrubs, perennials, groundcover, and ornamental grasses that are available. SPRUCE, COLORADO (Picea pungens) Ht 50-80 ft, Spd 25-35 ft. Full sun to part shade, moderate water needs. Low intensity fires easily kill this tree due to its thin bark and compact crown. Double pink flowers, large green fruit. Thornless, other characteristics same as species. Fruit: Light brown, hairless fruit; inch long; many broad, egg-shaped capsules that mature in the spring, then split into two parts containing many cotton-like seeds. Bark: Gray-brown, thin, fibrous; shreds with a red-brown color underneath. Plant trees on the basis of space available, soil conditions, proximity to irrigation lines and water requirements. This upright grower maintains its tight and formal shape without pruning. Leaves: Evergreen needles are light blue-green or silvery with white lines on both surfaces; 1 to 3 inches long; flat and rounded. Bark: Gray, smooth and thin when young; red-brown, rough and furrowed into scaly ridges at maturity. Buy direct from the grower and save money. In other parts of the country where winter temperatures remain cold and where cloudy, sunless days prevail, sunscald occurs less frequently. Aspen is another of Colorado’s extensive forest types, covering 5 million acres or 20 percent of the state’s forested land. Relation to Fire: Ground fires kill many trees due to thin bark. Fragrant chains of white flowers in spring; purple-black fruit. Available space. Relation to Fire: Easily killed by fire due to thin bark, relatively flammable foliage and accumulation of dead lower branches. H = heavy water needs; more than normal lawn watering. Leaves: Light green on top, paler on the bottom. Bark: Light grayish-brown; thick. White flowers, usually fruitless; dense foliage; yellow bark. We are located in Montrose, Colorado and serve many Colorado resort towns such as Telluride, Aspen and Vail as well as Denver and the greater state of Colorado. Landscaping with natives on a large or small scale can maintain biodiversity that otherwise would be lost to development. Habitat: Occurs in wetlands, stream banks, canyons and upland mountain slopes. Red-winged seeds in summer, very ornamental. Within these forested landscapes are several different tree species, the majority of which are coniferous or cone-bearing trees rather than deciduous trees that seasonally shed their leaves. Bark: Light to dark gray-brown; speckled,bumpy (lenticels). Fruit: 2 to 3-inch catkins produce capsules containing lightweight seeds with cottony hairs. *J.E. Pink to red flowers; red fruit; red to bronze foliage. This deciduous tree also puts up a … Look for new varieties of small trees that are continually introduced. Fruit: Yellow-brown, egg-shaped cones; thick, rounded cone scales that end in a blunt point; seeds are large with a very short wing. American Hornbeam. Epstein champions a wealth of trees for the Front Range, from cherry trees to oaks to a tree he discovered, the Hot Wings Tatarian maple. Leaves: Evergreen needles are stiff, dark yellow-green; 3 to 7 inches long; typically in bundles of 3 that form tufts near the ends of branches. Aspen Tree Aspen Trees are great for full or partly sunny areas. Plains Cottonwood and Rocky Mountain Maple. Relation to Fire: Although susceptible to top-kill by fire, it resprouts rapidly and prolifically from surviving root crowns and rhizomes. Leaves: Dark green on top; slightly lighter green below. Coordinate with other plants and elements of your overall landscape design. Pink flowers.
Relation to Fire: Generally killed by fire; very poor sprouting response. Revised 9/17. The Columnar Colorado Blue Spruce (25’ × 7’) is a spire of steely blue foliage that can slip into any sunny spot in your landscape. Dark green leaves, yellow fall color, tolerant of alkaline soils. Known for green leaves, maroon leaves, flowers and purple fruit, this versatile tree grows very well in the Colorado climate. Native multi-stemmed tree, persistent wafer-like fruit, golden-yellow fall color. “The tree that gets planted and dies in a year — that’s not good for anyone.” These are trees belonging to the class Coniferales. Survives in dry sites once established; orange–red fall color, more difficult to establish. Alternate leaves do not sit directly across from each other on the stem but rather … factors. The mission of the Colorado State Forest Service is to achieve stewardship of Colorado’s diverse forest environments for the benefit of present and future generations. Rose-red flowers, red fruits. They are tree species that are evergreen as they do not shed their leaves. Habitat: Many soil types, especially on well-drained, sandy and gravelly slopes; often in pure stands. Leaves: Evergreen needles are dark, blue-green with silvery lines on both surfaces; 1 to 1-1/2 inches long; flat and blunt tipped; crowded and curved upward on twigs at nearly right angles. These are true lilacs, but their globe shape is much taller than the ... Russian Hawthorn. Green in development; tan when ripe. Click on images of Samaras, Seed Pods, Fruits, Berries, Cones and Nuts to enlarge. Showy, white flowers; red fruit; glossy foliage; thorny; attract birds. To remember what "deciduous" means, try relating it to the word "decadent." Disclaimer |
Serving Colorado Springs, Pueblo, Avondale, and the surrounding areas with delivery available. Identifying trees that commonly grow in Colorado and the Rocky Mountain Region. New green growth turns purple-red, white flowers, purple fruit, suckers like aspen. M = moderate water needs; normal lawn watering. Fruit: Oblong, olive-green to blue cones; 3 to 5 inches long; upright on topmost twigs; fine, hairy cone scales; paired, long-winged seeds. Deeply divided by flat, connected ridges. “Colorado is not the easiest place to have a garden or a landscape or grow anything,” Harris says. L = low-water needs; can withstand drought. Ord’s list of Colorado-loving trees … Consider the length of the growing season, soil characteristics and exposure before selecting trees and shrubs for specific sites. Young branches are very flexible, hence the name. The Colorado State tree. Habitat: Well-drained, sandy soils; moist sites of narrow bottomlands or along mountains streams; often in pure stands. Dig a saucer-shaped hole that is 2 to 3 times the width of the root ball. Soil. Dark green on top with a pale green, hairy underside. Use in moist sites; cone-like fruit clusters persist in winter, tend to form clumps. ©2020, Colorado State University Extension, Fort Collins, Colorado 80523 USA. Forms groves by creeping roots; often shrubby; needs well-drained soil; golden-yellow fall color. Kentucky Coffee Tree. The best time to fertilize trees in Colorado. Habitat: Cold, high elevation forests; with Engelmann spruce and other conifers. Resistant to fireblight. Relation to Fire: Can be characterized as fire dependent. Alternate Leaves. Good cold hardiness, white flowers, crimson fall color. Habitat: Riparian areas and floodplains. Early pink flowers along twig before foliage; plant in part shade, heart shaped leaves. White flowers, red to purple fruit, orange to red fall color, single-stemmed tree or multi-stemmed shrub. Our physical location is 1311 College Ave, Fort Collins, CO. Having website issues? Fruit: Light red-brown cones; 3 to 4 inches long; egg-shaped with scales that are tipped by a sharp point; small, long-winged seeds. Fruit: Inch long with capsules containing 3 to 4 valves; many tiny, cotton-like seeds inside valves. Bark: Light brown, thin with many small scales. See more ideas about Deciduous trees, Plants, Shrubs. Relation to Fire: A fire-adapted species. Non-Discrimination Statement |
For information on larger trees, see fact sheet 7.419, Large Deciduous Trees. Leaves: Broad-leaf foliage is shiny green with a pale underside; narrow and 2 to 3 inches long; lance shaped with a fine, serrated edge and a pointed tip. White flowers followed by persistent red fruit. Many small trees, although short, can spread as much laterally as vertically. Habitat: Nutrient-poor soils on dry, rocky slopes; ridges up to timberline and often pure stands. Bronze-red new foliage turns blue-green, showy dark rose-pink flowers, can have small thorns, subject to locust borer and branch breakage. Resistant to fireblight. Privacy Statement |
Early yellow flowers before foliage, bright red fruit in summer. If space allows, several kinds of small trees provide varied foliage, flowers, bark, fruit and fall color for year round interest. Large Deciduous Trees. Best in moist well drained soil; pest prone and shorter lived at lower Front Range elevations and in heavy soils; root suckkers form clumps. Leaves: Lance-shaped, 2 to 4 inches; light green turning bright yellow in autumn. Forest types in Colorado include: Spruce-fir Ponderosa pine Lodgepole pine Douglas-fir Aspen Piñon-juniper Southwestern white pine Bristlecone pine Limber pine Colorado blue spruce and the cottonwood-willow combination found in many riparian areas Trees also reduce harsh winds, v moderate temperature extremes, and offset poor air quality. Table 1 includes small trees that are useful for privacy screening as … Large trees may survive low-intensity fires. Webmaster |
Bark: Gray-brown with thick scales on mature trees. CSU Extension - A division of the Office of Engagement. Habitat: Moist soils along streams; can often be found with willows and alders in coniferous forests. See the Colorado State Forest Service Seedling Tree Nursery’s page for information on available tree seedlings. Relation to Fire: Easily killed by fire, however, wind-dispersed seeds and ease of establishment on disturbed sites allow for greater post fire recovery. How to Select a Tree. The most effective tree fertilizing takes place in the spring and fall after trimming. Large white flowers, exfolaiting brown bark, can be tree or shrub from. Trees vary in many shades of color from bright green to silver-blue. Single, pink-red flowers; red-purple fruit. Relation to Fire: Thin, resinous bark of young trees makes them highly susceptible to fire; after 40 years, trees have developed a very thick layer of bark to protect them during hot ground and surface fires. Habitat: Dry, nutrient poor soils in open park-like stands or with Douglas-fir, Rocky Mountain juniper and spruce. Leaves: 2 to 5 inches long and wide. Aspen trees are short-lived, surviving about 120 years. New stands quickly establish when cones open and seeds are released. Adaptable to many soils. leucodermis) Best grown on dry sites to avoid fast, brittle branch growth; large panicles of yellow flowers in summer; Chinese lantern-like pods. Native, small tree or large shrub, gray bark, yellow fall color, bright red winter buds. Height: 10 to 15 feet, usually occurring as a shrub. Fruit: Cones are yellow-brown, unique, short and squatty; 1 to 2 inches long. Tree Bark characteristics are used when trying to identifying trees, especially deciduous trees, year round. Everyone enjoys the beauty a shade tree proides. Providing trusted, practical education to help you solve problems, develop skills and build a better future. Examine the proposed site before planting trees. There are two prime times of year to fertilize your trees in Colorado: late spring and late fall before the first major snowstorm. Red flowers produce dark persistent fruit. Habitat: Usually found in open areas of low precipitation where subfreezing temperatures do not persist for much of the year. Recommended Trees. Other deciduous trees in Denver include: Gambel oak, Narrowleaf Cottonwood, Peachleaf Willow. Habitat: Moist sites near water; a riparian species growing near rivers, streams, lakes, swamps, marshes and wetlands. Habitat: Mostly well-drained soils in high elevations, often in pure stands. Fruit: Blue-gray berries; waxy and juicy; 1/4 inch in diameter; typically two-seeded. White flowers; crimson fruit, yellow bark. Fruit: Fruit are catkins; up to 4 inches long; many light green capsules contain 6 to 8 tiny, cotton-like seeds. Habitat: On exposed, cold, dry, rocky slopes and high mountain ridges up to timberline; in pure stands or with limber pine. Klett, Colorado State University Extension landscape horticulturist and professor, horticulture and landscape architecture; and E. Hammond, Extension horticulture agent, Adams County. During the winter months after leaves have often blown away (although there are trees that hold onto their leaves until spring), buds may be dormant and hard to identify and the fruit, seeds and flowers might be long gone. Habitat: Occurs naturally in a wide range of soil types and textures, although generally regarded as a riparian plant. Margins doubly-serrated with pinnate venation. Showy, white flowers in spring; red fruits attract birds, red-orange fall color. Pinkish-white flowers followed by maroon-red foliage; avoid wet sites. Bark: Gray-brown, thick, with flaky scales. 2 to 4 inches long; pinnately compound with 3 to 5 grouped leaflets. When planting, make sure first root is at or one or two inches above grade. Colorado’s major tree species include bristlecone pine, Colorado blue spruce, Douglas-fir, Engelmann spruce, limber pine, lodgepole pine, narrowleaf cottonwood, quaking aspen, piñon pine, plains cottonwood, ponderosa pine, Rocky Mountain juniper, subalpine fir and white fir. By growing over 98% of our plants in Colorado they are used to our harsh climate. Cherries range from dark-red to dark-purple. *Seeds released from cones by exposure to extreme heat. Fruit: Light brown, short-stalked cones that hang down from the branches; 1-1/3 to 3 inches long; many thin, rounded cone scales on top of long, 3-pointed, winged seeds that stick out beyond scales. On the other hand, trees that require moderate to heavy moisture do poorly in areas where little or no supplemental water can be applied. Apr 4, 2016 - A visual reference to the list from The Pacific Northwest Gardeners's BOOK OF LISTS - deciduous trees with columnar character. Each cone contains 10 to 20 large, edible, oily seeds. Available as single-stemmed tree or multi-stemmed shrub; scarlet fall color; avoid alkaline soils. Bosnian Pine (Pinus heldreichii var. Young trees are able to sprout from roots and/or branches after a fire. Habitat: Common on moist sites; often found along streams in mountainous areas at higher elevations. Do not use as street trees! Both come from the Latin root meaning "fall." Pink to red fruit capsules open to expose orange seeds. Habitat: High, cold forest environments on moist, northern slopes; with subalpine fir and other conifers. Recommended to you based on your activity and what's popular • Feedback Horizontal branching, creamy-white flowers followed by blue-black fruit, red to purple fall color. Red to purple fall color. Fragrant, double, white flowers, age to pink; red fruit, short thorns. Good for small spaces, red flower buds to white flowers, orange red fruit. Leaves: Evergreen needles are dark with white lines, they have white pitch dots on both surfaces; to 1-inch long; crowded in a long, dense mass along the twig; generally 5 in a bundle. Habitat: Open woodlands; alone or with junipers on dry rocky foothills, mesas and plateaus. Forests and woodlands cover approximately 24 million acres in Colorado. Table 1 includes small trees that are useful for privacy screening as well as landscape interest. Bark: Gray and smooth with resin blisters on young trees; red-brown, very thick and deeply furrowed with broad, often corky ridges at maturity. Through careful selection, you can have flowers, colorful and interesting bark and fruits, varied foliage texture, and fall colors for year round interest. Smooth gray-brown bark, malodorous white flowers, persistent orange-red fruit, yellow to red-purple fall color. Habitat: Moist soils of high mountain valleys; in pure stands and with other firs. Finely cut, glossy leaves; white flowers; persistent, red fruit. Low branched smooth gray bark, “muscled” branches, yellow-orange fall color. C. Wilson, retired Extension horticulture agent, Denver County, contributed to original content of fact sheet. Dark green, palmately lobed; veined with 3 to 5 lobes. Dark green leaves turn yellow in fall. Leaves: Evergreen needles are to 1-inch long with bracts at the base. The Tree Farm deciduous trees listing. The key to symbols used in the table is given below. Bark: Light gray and smooth with resin blisters on young trees; deeply furrowed into corky ridges and orange cracks when mature. Orange-red fall color. Horizontal to pendulous branching, yellow to red fall color, pink fruit capsules open to reveal orange seeds. All of our inventory is for sale only at our nursery located in Longmont, Colorado. Leaves: Evergreen needles are deep blue-green with white lines; 5/8 to 1 inch long; slender, sharp and flexible; skunk-like odor when crushed. Do not use as street trees! CSU A-Z Search
Burr Oak. Consider available space, protection, growth rate and soil adaptability when selecting small trees. Margins may be slightly lobed, resembling a classic maple leaf. (B). Coniferous Trees. Aspen, known as quaking aspen, are Colorado’s only widespread, native, deciduous tree and can be found from 6,500 to 11,500 feet in elevation, particularly on the West Slope. Disperses seeds in the wind; resprouts following fire; can quickly revegetate burned areas. Contact your local county Extension office through our County Office List. Use in moist soils; yellow fall color, tends to form clumps, cherry-brown bark. If you have room, though, you can’t go wrong with native Colorado species like the Colorado blue spruce (the state tree), Ponderosa pine, or Southwestern white pine. Bark marked with rows of raised air pores (lenticels) which develop into shallow grooves with age. White flowers; showy, orange-red fruit; red-orange fall color; narrow thorns. Relation to Fire: Young trees can be killed by any fire; mature trees can only survive low-intensity fires, but due to the sparse fuels, late snow-melt and short growing season, this species is rarely affected.
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