Blackjack Oak Tree Leaves

1. Blackjack Oak Tree Leaf Arrangement
2. Blackjack Oak Tree Leaves
3. Blackjack Oak Tree Leaves Pictures

Identifying trees can be trickier in the winter, but many types of oaks, such as the white oak, hold onto their leaves in the colder months—even if the leaves turn brown and die. If the oak loses its leaves, you can look for other clues, like the appearance of the bark or the shape of the buds at the ends of branches.

• Blackjack oak is a small to medium-sized tree with a rounded, irregular crown; distinctive bark; and a tendency to retain dead branches on the middle to lower part of the trunk. It is well limbed along the entire length of the trunk. Leaves are distinctively wedge- or bell-shaped; alternate, simple, bristle-tipped, leathery, and shallowly 3-lobed.
• For blackjack the leaves are large and only have three somewhat rounded lobes which are not deeply cut into the leaf, although this varies considerably. The leaves are very dark and thick, with points at the tip of the lobes as blackjack is considered a “red oak”.

Oak Leaf Pictures page has many great photos of oak leaves. You will find lots of good red oak leaves, white oak leaves, pin, bur and english oak leaf pictures with oak tree facts and information, more oak leaf pictures on the way soon

Oak tree Gallery consists of two pages of oak tree images with an impressive oak tree photos page.

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Oak Leaf Images

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Oak Tree Scientific Name: Quercus

Types of Oaks: Kinds of Oak Tree Types

• Bur Oak Tree
• Black Oak Tree
• Bluff Oak Tree
• California Oak Tree
• Chestnut Oak Tree
• Cork Oak Tree, evergreen oak tree harvested for its cork bark
• Eastern White Oak Tree
• English Oak Tree
• Florida Oak Tree
• Live Oak Tree
• Northern Red Oak Tree
• Nutall Oak Tree
• Overcup Oak Tree
• Pin Oak Tree
• Post Oak Tree
• Red Oak Tree
• Sawtooth Oak
• Scarlet Oak Tre
• Shumard Oak Tree
• Southern Red Oak
• Swamp Chestnut Oak Tree
• Texas Oak Tree
• White Oak Tree

Oak Tree Information, Types of Oak Trees

The mighty, majestic oak tree has, throughout the centuries, been the subject of story, song and proverb. More than 80 species of this beautiful oak tree are found in North America. All oaks trees are deciduous trees with toothed leaves and heavy, furrowed bark. The fruit is, of course, the acorn. Like other deciduous trees, most oaks shed their leaves in fall. However, in warmer areas of the continent, some varieties, the live oaks, keep their greenery throughout the winter. Oak Trees have always been economically important for their hard, strong wood which has a multitude of purposes including furniture and flooring. The oak tree also have landscape uses although mature trees can dominate smaller sites.

Oak, White
Quercus alba
An impressive tree with a stately, broad-rounded form. Suitable for larger areas. Dark green leaves in the summer, turn showy red in the fall. Slow to moderate growth rate. Prefers acidic, moist, well-drained soil and full sun. Grows 50'-80', with an equal spread.
Type of tree:
The White Oak falls into the following type(s): Shade Trees
Mature Height:
The White Oak grows to be 50' - 80' feet in height.
Mature Spread:
The White Oak has a spread of about 50' - 80' at full maturity.
Growth Rate:
This tree grows at a slow to medium growth rate.
Sun:
This oak does well in full sun.
Soil:
Soil type acidic, loamy, moist, sandy, well-drained
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Shape:
This oak has rounded shape.
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Additional Information
Description:
An impressive tree with a stately, broad-rounded form. Suitable for larger areas. Dark green leaves in the summer, turn showy red in the fall. Slow to moderate growth rate. Prefers acidic, moist, well-drained soil and full sun. Grows 50'-80', with an equal spread.

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Oak Tree Comments

Oak Tree: Great shade tree to sit under on hot summer days, almost feels the temperature is dropped 5-10 degrees less. Mature oak tree can grow quite tall at 40-50 feet plus so do not plant too close to the house.

Oaks: Oak tree leaves stay on the tree for a longer time than say themaple tree. This means that one will be raking the oak leaves into late fall or if snow falls early, possibly the following spring.

Oak Tree References

Red Oak Trees, Scientific name: Quercus falcata Michx. - Factual and detailed accounting of the southern red oak in the US, the characteristics, classification of Quercus falcata Michx or southern red oak

White Oak Trees; White oak named Quercus alba is widespread across eastern North America, high-grade wood makes the white oak an important lumber tree, making staves for barrels, acorns are an important for many birds and other kinds of wildlife White Oak Trees

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Unique Trees of North Texas:

Blackjack Oak

(Quercus marilandica)

By Jeremy Priest

This interesting oak species is often an associate of the better-known post oak, but blackjack oak is even more drought tolerant and survives on some of the toughest sites around. Owing to these extremely poor sites, blackjack oak often seems to be a smaller, stunted oak, with 100-year-old trees sometimes only being 20 feet tall and only a foot in trunk diameter. Don’t let it fool you though, blackjack can make for a beautiful shade tree and grows quite large when water is adequate. It is never a fast-growing tree, but on good sites growth rates may be nearly double that of post oak. The limiting factor for blackjack oak is an extreme intolerance to shade. This tree needs full sun so much so that its lower branches are easily shaded out by the upper canopy of the tree. Much like bald cypress evolving to tolerate extremely wet sites, blackjack oak has evolved to tolerate very poor and dry sites so that it can achieve full sun.

The common name most likely relates to the leaf shape and dark appearance of these trees. Not only is the bark dark and almost black, but the large thick leaves provide heavy shade. This tree also uniquely retains its dead understory branches and during the winter has leaf marcescence. This can lead to an overall spooky appearance when multiple blackjack oaks grow near each other. Most of the time the dead branches add to the look of the tree and there is no reason to remove them, unless there is a strong likelihood of damage if the branch were to fall. Since these lower branches are dying due to shade, these dead branches do not represent an issue with the tree, and it is completely natural for blackjack. If branches on the top of the tree die then there is a problem with the tree.

Blackjack oak is fairly easy to identify from overall appearance, but the leaves are also quite distinct. As with other oaks they are simple, with a smooth margin, and are arranged alternately. For blackjack the leaves are large and only have three somewhat rounded lobes which are not deeply cut into the leaf, although this varies considerably. The leaves are very dark and thick, with points at the tip of the lobes as blackjack is considered a “red oak”. Most oaks with rounded lobes fall into the white oak category, so look for the bristles on the tips of the leaf to ID blackjack oak. The bark is very dark, but does have a red appearance underneath if damaged. Like all oaks, this tree has acorns which are small but otherwise fairly normal.

Blackjack Oak Tree Leaf Arrangement

Although the scientific name of this species means “of Maryland”, this tree is native across most of the southeastern US and encompasses the Cross Timbers region. Blackjack oak is not tolerant of highly alkaline soils which is why it has a slightly narrower range than post oak. The minimum annual rainfall needed is 17 inches according to USDA Plants Database, and it does not tolerate anaerobic conditions, i.e. flooding. One of the densest populations of blackjack oak in Arlington’s parks is at the Southwest Nature Preserve. This upland site is very dry and rocky but is also acidic and iron rich which is visible in the exposed red soil on the hilltop.

Blackjack Oak Tree Leaves

The native range of blackjack oak includes the Cross Timbers

Blackjack Oak Tree Leaves Pictures

As mentioned before, this a red oak species which most notably means there are no tyloses in the xylem vessels. Blackjack is shade intolerant as with most red oaks and though decay resistance is still high, there is less decay resistance than the white oak family. However, blackjack is extremely drought tolerant and can survive with minimal annual growth which is not normal for red oak species. It also has an extremely long lifespan, probably exceeding 100 years. The average lifespan is not easy to predict as this tree is not very common, but there is probably high mortality when young. Blackjack oak does not like competition and needs full sun, but otherwise experiences few health problems. If planted, soil drainage and pH could be an issue for tree health. Blackjack oak can reach heights of 40-50 feet and crown diameters of 40-60 feet. The largest one I’ve seen in Tarrant County (top photo) was over 30 inches trunk diameter and would have been one of the largest on record in Tarrant County. This large tree was probably over 110 years old, unfortunately it was recently removed, perhaps because the developer did not understand the value of a large blackjack oak. The state champion tree is in Henderson County and is 43 inches in diameter with a height of 65 feet.