Examples of mallet eucalyptus trees are the red-spotted gum tree Eucalyptus mannifera and the sugar gum tree Eucalyptus cladocalyx. Eucalyptus rainbow Eucalyptus deglupta Tree. Rainbow eucalyptus trees have attractive multicolored smooth bark. Eucalyptus Rainbow trees grow up to 30 ft. The vast, showy evergreen trees have lance-shaped leaves with the distinctive eucalyptus aromas. Also called rainbow gum trees, rainbow eucalyptus trees get their name from their multicolored bark. The smooth orange bark peels away, revealing orange, purple, blue, and maroon stripes.
This eucalyptus species is an excellent shade tree due to its sizable conical crown spreading up to ft. As with all eucalyptus leaves, the rainbow tree eucalyptus leaves give off a strong aroma when crushed.
Eucalyptus Rainbow Eucalyptus deglupta leaves. Flowers of rainbow eucalyptus are white and pale yellow. The small fruit is called a capsule and has a brown color when mature, with a shape like a half of a sphere.
Eucalyptus rainbow fruit is green when immature left and brown when mature right. Eucalyptus baby blue Eucalyptus pulverulenta tree. Eucalyptus baby blue are small evergreen trees or sprawling shrubs. They are fast-growing eucalyptus plants with ornamental, decorative stems. The distinctive feature of baby blue eucalyptus plants is their blue-gray rounded leaves. These egg-shaped leaves grow along thin stems in opposite pairs.
A white, powdery substance covers the buds, fruits, and leaves. Eucalyptus baby blue shrubs or trees grow to 16 — 30 ft. These eucalyptus plants thrive in zones 8 — Eucalyptus baby blue leaves are oval, heart-shaped, or egg-shaped leaves.
Eucalyptus baby blue flowers are clusters of creamy-white fuzzy flowers growing in between the oval leaves. Young tree of eucalyptus silver drop Eucalyptus gunnii. Eucalyptus silver drop trees are medium-sized trees with smooth bark, bluish-green oblong leaves, and small flowers. Silver drop eucalyptus trees grow up to ft. As with most eucalyptus species, the silver drop has exfoliating bark. Eucalyptus silver drop is also called the cider gum tree.
The long-lived, fast-growing tree thrives in zones 8 to 10 and needs full sun or partial shade. The decorative shape of young silver drop leaves makes them ideal for flower arrangements. Eucalyptus silver drop leaves are rounded, heart-shaped when the tree is young.
The young leaves have a glaucous grayish-green color appearance. As the tree matures, the leaves become oblong, lance-shaped, and grow up to 3. Mature leaves and flowers of eucalyptus silver drop. Young silver princess gum tree Eucalyptus caesia. Silver princess gum trees are a species of eucalyptus with a distinctive weeping growth. Fast-growing silver princess eucalyptus trees grow between 7 and 45 ft.
Silver princess gum trees also produce pendulous red flowers that dangle between the drooping foliage. Silver princess eucalyptus tree leaves are oval to begin with and become lance-shaped as the tree matures. Silver princess eucalyptus tree flowers grow in groups of three.
The dangling flowers look furry due to the clusters of dark pink — reddish stamens with yellow tips. Lemon eucalyptus trees are spectacular tall trees with white bark and leaves that give off a citrusy aroma. Also called the lemon-scented gum tree, this ornamental tree has a straight trunk that branches out to form a large canopy. Lemon-scented gum trees grow between 80 and ft.
The white, pink, or copper bark sheds in thin flakes. On his ranch, among many different types of produce trees including olives, walnuts, and figs , he grew over acres of eucalyptus.
The eucalyptus forest he started lives on to this day at the Ellwood Bluffs. Cooper became a vocal advocate for the eucalyptus, emphasizing its unique, aesthetically pleasing appearance, as well as its useful qualities.
He even wrote the first book in the U. Eucalyptus became very appealing to foresters in the s and s as native hardwoods were being severely depleted. Starting in the s, the first large-scale commercial planting of the blue gum eucalyptus E. The blue gum, a mid-sized eucalyptus reaching around to over feet tall, is the most common eucalyptus in California. These trees are easily recognized by their waxy blue leaves and a grayish bark which reveals a smooth, contrasting yellowish surface when the bark sheds off in long strips.
As with many other eucalyptus species, sprouts can grow back from a fallen tree stump. By the early s, the get-rich mindset had caused many aspiring forest tycoons to plant countless acres of eucalyptus in hopes of selling the timber for a tidy profit.
Sadly, most of these schemes went the way they infamously did for Frank C. Havens was an Oakland developer who opened a mill and planted eight million eucalyptus trees in a mile-long strip from Berkeley through Oakland.
But when he came to sell the timber, it was found that the trees were too young to make suitable wood; the young wood had an irregular grain and it bent, cracked, and shrank when dried. It is true that eucalyptus trees from Australia could make good timber, but those trees were decades or sometimes centuries old.
It was soon found that eucalyptus trees would need to be at least 75 or years old for good lumber. Havens closed shop. Other options for selling California-based eucalyptus products were grim. The wood became increasingly sold just for fuel, but cheap electricity and gas soon replaced it.
By , eucalyptus trees were primarily grown in California as ornamentals or windbreaks. Introduced widely to California after the Gold Rush, eucalyptus have become some of the most symbolic trees to the state. Many Californians mistake the trees for native species since they dominate so much of the wildlands. People in Florida can grow the more tropical, rainforest species of Eucalyptus, such as the stunning Rainbow Gum.
A small handful of cold-hardy varieties of eucalyptus can grow in areas that experience occasional sub-zero degrees fahrenheit during the winter.
These varieties allow citizens of the places like the U. Eucalyptus love to be in the sunniest places available and do well in nutrient-poor soil. Once established, they tolerate drought very well. Interestingly, eucalyptus have different leaf shapes depending on the age of the tree, making identification difficult in some situations.
While there are plenty more, here is a shortlist of some of the most important uses for eucalyptus. Anyone who has walked in a eucalyptus forest knows the intense, spicey, minty smell the trees produce. This smell mainly comes from the chemical compound eucalyptol, which is found in the green leaves of eucalyptus trees.
Eucalyptol is a powerful therapeutic oil. People have used eucalyptus oils for a wide variety of medicinal uses throughout history. It has antimicrobial properties , meaning it can kill bacteria and microbes. People have also used eucalyptus oil for dental care, respiratory illness, pain relief, as an immune stimulator, and to sterilize equipment. Some people enjoy the scent of eucalyptus and use it in aromatherapy or as a perfume. In many highland tropical and subtropical areas of the world, people use eucalyptus as fuel for cooking and heating their homes.
East Africa, South America, and Southeast Asia all have extensive eucalyptus stands for firewood use. Due to their attractive, classy blue-green or grey-green color, many florists use eucalyptus leaves as fillers for flower arrangements.
Silver dollar eucalyptus, with its large, round leaves adds nice volume and interesting shapes to any bouquet. They look fresh for weeks! While not native to California, the western Monarch Butterfly population currently relies on these trees as safe roosts to spend the winter. The western Monarch population winters almost exclusively in California and a majority of all of the wintering sites include eucalyptus trees.
This demonstrates that non-native plants can play important roles in ecosystems, even if the same plants can be destructive elsewhere. Due to their rapid growth, eucalyptus also make excellent windbreaks for farmers. A windbreak is usually a long hedge or row of trees planted on the windward side of a crop.
The windbreak acts as a wall that slows down the wind. Windbreaks help farmers use less water on their crops. Plants limit their use of water by creating thin layers of humid air around their leaves through transpiration. Wind rapidly whisks away this humid air and replaces it with dry air.
As a result, the plants must use more water to thrive in a windy environment. When farmers reduce wind with windbreaks, plants can keep that layer of humid air around their leaves, and therefore use less water to grow. In drought-prone places, such as California and Australia, windbreaks are useful in reducing the amount of water crops use.
They can also improve crop yields. The eucalyptus genus, as mentioned above, is large and very diverse. To make sense of the genus, some botanists break it down into two broad categories of eucalypts; mallees and trees. These categories correspond to different growth habits within the genus. These categories provide a useful framework to understand the growing habits of eucalyptus. Mallee is an Australian Aboriginal word that refers to bush eucalyptus species that grow less than 30 feet tall.
Mallee eucalyptus have many different stems, rather than one central stem. Mallee eucalypts have lignotubers, which are huge, basically like big, potato-like roots.
Eucalyptus trees Eucalyptus spp. Department of Agriculture zones 8 to They're a type of gum tree; in fact, the word "gum" appears in the common names of several eucalyptus species.
However, other types of trees in North America and Asia are also called gum trees. Eucalyptus species are a type of gum tree. However, species in other genera are also called gum trees. Eucalyptus trees are fast-growing broadleaf evergreens.
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