Corymbia citriodora


Michael's Opinion

The Lemon Scented Gum Tree is a very interesting variety of Eucalyptus. At a first glance its tall, pale, lanky looking form reminds me of myself. Seeing them in a large group is a bit strange at first as the pale white bark looks unique. Its lemon scented oils can be used as an insect repellent. This tree stands out to me because it’s one of the only Eucalyptus trees that doesn’t smell like Eucalyptus, it smells of lemon instead.

Botanical Information

FamilyMyrtaceae
GenusCorymbia
Speciescitriodora
CategoryWoody
TypeTree (evergreen)
OriginThe Corymbia Citriodora is a tall tree native to the northeastern areas of Australia.
Ethnobotanical Uses
Disclaimer
The Corymbia Citriodora is used for a wide variety of things in the world. Its timber is relied on for construction uses. It’s also important in the production of honey. Corymbia leaves are also used as a traditional aboriginal herbal remedy. The essential oil of the tree contains a high amount of citronella which can be used as an antiseptic or antibacterial. This oil can also just be used as a perfume as it has a strong citrus smell to it. The leaves also produce a sweet manna like substance that can be enjoyed as a tasty treat.

Details

USDA Hardiness Zone9 - 11
USDA Hardiness Ref.
Canadian Hardiness Zone8 - 11
Canada Hardiness Ref.
RHS Hardiness ZoneH4
RHS Hardiness Ref.
Temperature (°C)(-3) - 39
Temperature (°F)26.6 - 102.2
Height30 - 50 m
Spread24 m
GrowthMedium
Flowering PeriodMay, June, July

Description and Growing Information

General DescriptionThe lemon scented leaves are a pale green color and don’t change color throughout the seasons. One distinguishable feature the tree has is that the first branch often grows halfway up the height of the tree. The bark peels off as time passes and reveals a smooth, pale-white bark underneath that will turn grey after time.
ID CharacteristicOne easy identification characteristic is the strong citrus smell the leaves and wood gives off. Another key feature is the pale, narrow, tall stem of the tree, with its creamy whitish grey bark. Another thing I would look for when identifying the species is a lignotuber at the base of the tree’s trunk.
ShapeThe tree is often straight stemmed with an upright form ranging from 25- 40 meters tall.
LandscapeThe Corymbia citriodora has a variety of uses in the landscape. It can be planted in groups to provide shade and shelter. They also use the tree as a windbreaker and for land reclamation. This tree has also always been used as an ornamental landscape tree.
PropagationThe seedlings can be surface sown from a sunny position in the green house during February/March. They like to have 6 - 8 weeks cold stratification at 2°C. Pot up the seedlings into individual pots as soon as the second set of seed leaves has developed. Plant into permanent positions as soon as possible.
CultivationThe Corymbia Citriodora is a very resilient plant. It can handle a very long dry period (5-7 months). It isn’t a very cold hardy plant but it can do well in areas that occasionally have frost. It likes a nice sunny area with well drained fertile soil, although it can tolerate poor dry soils with low mineral content. These trees are very drought tolerant once they are established.
PestsThe tree is often a host for psyllids. They suck out the plant’s juices leaving it all bummy. This pest is also known for secreting honeydew that can lead to a sooty mold forming on the tree. It can also be an attraction for beetle borers. Oval shaped holes are a sign of infestation. Root rot can also be a problem for these trees. Unsterilized soil or contaminated water can be a cause of this in a garden setting.
Notable SpecimensKings Park in Perth Australia has a very beautiful avenue lined with this tree.
HabitatThe corymbia citriodora grows mainly in dry forests and woodlands.
Bark/Stem DescriptionThe bark is smooth throughout the stem. It has a pale whitish grey color and sheds off the trunk in thin curling flakes. The tree is often single stemmed with wide spreading foliage.
Flower/Leaf Bud DescriptionThe flower buds are in groups of three and have a pale green color. In late spring to early summer the flowers open up to reveal a beautiful creamy white flower.
Leaf DescriptionThe leaves are alternating, the petiole is 1-2.5 centimeters long. The blades are narrow and can be 10- 23 centimeters long. The leaf as a glossy green color and when crushed they smell strongly of lemon or citronella.
Fruit DescriptionThe Fruit is barrel shaped (urceolate) 0.8 -1.5 centimeters long. 0.7-1.2 centimeters wide with pedicels 0.1 – 0.7 centimeters long.
Colour Description The bark is a smooth powdery whitish grey bark color. The plant has evergreen foliage that stays the same shade of green the whole year round and its shiny/glossy.
Texture DescriptionThe bark is said to have a smooth almost powdery feeling to it. The leaves are glossy.

Photographs