Broadleaf Mistletoe (Phoradendron spp.)

   Broadleaf Mistletoe (Phoradendron spp.) is an evergreen plant that is parasitic in nature, it grows freely on a variety of large landscape trees. Some deciduous host trees of broadleaf mistletoe include Apple, Ash, Birch, Boxelder, Cottonwood, Locust, Maple, Oaks Walnut and Zelkova to name a few. Conifers are not found to often be host of the Broadleaf variety, but can host the dwarf varieties.

Mistletoe plants often develop in rounded form and can reach upwards of two feet in diameter. The plants develop small whitish colored berries that are sticky to the touch. Mistletoe plants are leafy and evergreen becoming most visible in the winter when the deciduous host trees have dropped their leaves. The plants are either female (berry producers) or male (pollen producing only). Many birds feed on the berries and excrete the living seeds which stick to any branch they land on. Older and large trees are often the first to be infested because birds prefer to perch on higher limbs. The down side of this is a heavy build up of mistletoe is most likely to occur in these same larger trees as the birds enjoy feeding on the berries of the mature Mistletoe plants. Often times growths in the upper branches will drop seeds to the lower sections below, spreading the growth even more. Dwarf Mistletoe does not spread in the same way as Broadleaf, instead it's seeds are forcibly discharged from the fruit, dispersing up to 40 feet away.

Image Citations (Photos 1 & 2): Paul A. Mistretta, USDA Forest Service, Bugwood.org

Once a seed is in place the seed will germinate, during this time it will begin to grow through the bark of the tree and into the tree's water conducting tissues. Within the tissues, structures similar to roots form, they are called haustoria. Haustoria will spread as the parasitic bush grows and spread. Young growths are slow growing and may take years before they bloom for the first time, their succulent stems become woody over time at the base of each growth. Even if an entire visible growth is removed from it's host plant, it will often resprout directly from the haustoria that is embedded into the host. On the other hand dwarf mistletoe is not woody when mature and is segmented with small scale-like leaves.

Mistletoe can be harmful to a tree that is already weakened but generally does not harm normal, healthy trees. It is possible for individual limbs and branches from healthy trees to become weak or die back. In instances of heavy infestation the entire tree may be stunted, weakened or killed if there are other factors such as disease or drought.

The most effective way to control mistletoe is to remove the infested branches, this will eliminate the haustoria which will prevent re-sprouting. Infested branches must be cut at least 1-2 feet from the base of attachment to be sure you are removing all of the haustoria from the inner tissues of the host. In cases of heavy infestation it may be recommended to remove the entire tree as you can not safely remove more then a portion of the trees crown without causing severe damage or death to the tree itself. If you are not able to prune the tree to eliminate the growth, completely removing the visible mistletoe growth annually will often help limit the spread as only mature growths can produce seeds.

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White Pines - Pinus strobus

  White Pines - Pinus strobus are a large growing evergreen with blue-green needles that are generally 2 1/2-5 inches long.  The needles grow very densely on the branches.  Pines are different from other conifers/evergreens, their needles grow in sheathed groups of 2,3 or 5.  It is a tall tree with straight gray-brown trunk and horizontal growing branches.  The cones are small and slender rarely growing longer then 3-6 inches.  White Pines can live on average 200-250 years although there are a few recorded to be over 400 years old.  Growing about 3 feet per year between the ages of 15-45, but at a slower rate in the juvenille and mature stages before and after that point-they can reach heights well over 150 feet tall, one record holder came in at 207 feet (The Boogerman Pine).  

The White Pine has a very wide growth range from the North Eastern United States through Southeastern Canada, this is the only five needled Pine that grows East of the Rocky Mountains.  Another five needled Pine found in the United States is the Sugar Pine, this is only found in the West. Thought to have originally covered most of the Eastern United States, there are only 1% of the original old growth forests remaining, after the extensive logging operations that occured in the early 20th century.  It is found in the neartic temperate broadleaf and mixed forests biome of Eastern North America.  Prefering well drained/sandy soils and humid climate, it also performs well in boggy areas and rocky highlands.  This tree towers over most others including many broadleaf hardwoods and provides food and shelter to many small mammals and numerous forest birds.

   

Image Citations (Photo 1 & 2): Steven Katovich, USDA Forest Service, Bugwood.org

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Red Spruce - Picea rubens

  The Red Spruce - Picea rubens is a small-mid sized tree that can reach 50-80 feet tall. Red Spruce is a long lived tree that can live to be well over 400 years old. Red Spruce can be found growing from Canada in the North through North Carolina, Tennessee and Georgia in the South. The branches on the Red Spruce are close in proximity to one another, growing straight out from the trunk and gently sweeping upward near the ends. The wood of Red Spruce is light in color and weight, straight grained, and resilient. This type of lumber is used for making paper, construction lumber, and stringed musical instruments.

Image Citation: Keith Kanoti, Maine Forest Service, Bugwood.org

Red Spruce is moneocious, with male and female flower buds occurring on the same tree but different branches, each year in May. The pendant male flowers are bright red while the female flowers are erect and bright green in color with a hint of purple. The seeds are small and winged, borne in cones. Cones mature from about mid-September to early October, the autumn following flowering. Cones are 1.3 - 1.5 in long, light red-brown, with rigid, rounded scales that are slightly toothed on the edges. Cones are receptive to pollen only when fully open, a condition which lasts briefly for only a few days. The needles are easily identified, they are shiny yellow-green on all sides and point out in all directions very much like porcupine quills. The needles are stiff 3/8 - 5/8 inch long, sharply pointed, four sided and awe shaped.

Image Citation: Georgette Smith, Canadian Forest Service, Bugwood.org

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Java Plum - Syzygium cumini

  The Java Plum -  Syzygium cumini, Is a fast growing evergreen tree that reaches heights of 30-80 feet tall depending on the location/conditions planted.  It is considered a tropical tree and is a member of the flowering plant family Myrtaceae.  It grows in an erect single trunk they could be straight or crooked in form with a rounded crown.  The tree was introduced to Florida in 1911 by the USDA, it originated from Asia, specifically India and Burma.  It has become established in Maritime hammocks, lake margins, flatwoods and rocklands throughout Central and Southern Florida.  It is similar to the Malabar Plum Syzygium jambos but can be distinguished by the different sized leaves and fruit.  It is treated by the state of Florida as an invasive species. It can be found growing from Sea Level to 6000 feet above in the tropics. It grows best in areas with very high rain or humidity levels.

Image Citation: Forest and Kim Starr, Starr Environmental, Bugwood.org

The leaves of the Java Plum are opposite, simple, thick, leathery, elliptic or oblong in shape with a rounded base and tip.  The upper surface of the leaves are lustrous and dark green in color with visible yellow lateral veins, the lower surface is a yellow-green in color and duller in sheen. Leaf blades are 7-18 cm long and 3-10 cm broad with a light yellow petiole of 5-25 mm long.  The leaves are said to smell similar to turpentine when crushed. The flowers are individually small in size only reaching 7 mm long, with 4 petals, fused in a rounded cap that opens and exposes a mass of white or pink threadlike stamens.  The flowers are produced in clusters 5-6cm long on the wood of the previous year.  Flowers on the Java Plum occur year round.  The fruit is fleshy with a single seed, it occurs as a oblong or ellipsoid berry that is 1-2.5 cm long and 2 cm in diameter.  When young the fruit is green becoming pink, red and then a purple-black.  The fruit matures year round the same as the flowers.  The pulp ranges from purple to white and is very juicy, with a sweet flavor in high quality varieties to astringent flavor in poorer varieties.

The products of the Java Plum are used for various purposes.  The fruit is used to make wine and vinegar, they are also a high source of Vitamin A and Vitamin C.  The fruit seeds are used in alternate healing processes, Unani and Chinese Medicine (digestive ailments) and Ayurveda (diabetes control).

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"Dragon's Claw" or "Corkscrew" Willow - Salix matsudana

  The "Dragon's Claw" or "Corkscrew" Willow - Salix matsudana - is a cultivar of the Chinese (Babylon) Willow.  This cultivar grows very fast from cuttings made from the youngest (and often most curly) shoots.  It is considered medium to large in size and is a deciduous tree that grows in a primarily upright fashion. Chinese Willow's have a relatively short lifespan, estimated between 40-75 years in the wild. The Chinese Willow is a Native of Northeastern China. It has been planted heavily as an ornamental in the United States, Europe and Australia, so is seen often outisde of it's native area.  

Photo 1 & 2 Image Citations: Tom DeGomez, University of Arizona, Bugwood.org

The leaves of this variety come out early in the Spring and often hold on well into December.  Even in Winter when the tree is bare the interest of the curls and curves in the branches remain, making it a beautiful year round addition to any landscape.  The leaves are green in color and when flattened look similar to the more common types of Willow (Weeping, Babylon and Coastal).  The female and male flowers appear as Catkins and are always on different trees. The branches are often used in floral arrangements or even as bonsai because of their unique curling habits.

The Corkscrew Willow is available at most major nursery's and makes a lovely addition to any landscape.  It may also be sold as a Dragon's Claw Willow or Curly Willow.

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West Indian Mahogany - Swietenia mahagoni

   The West Indian Mahogany - Swietenia mahagoni, is best recognized by the fissured brown bark, leaves with curved leaflets and large fruit capsule.  It is a evergreen or semi deciduous tree that reaches heights of 50-85 feet and grows in an erect fashion with a broad crown.  It is native to subtropical hammocks, commonly grown in private gardens, along roadsides and in highway medians in South Florida.  The Swietenia is a small genus of only 3 species distributed in tropical West Africa and tropical America.  

Image Citation:  By I, J.M.Garg, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2602302

The bark of the West Indian Mahogany is brownish and smooth when young, becoming reddish brown and fissured at maturity.  The leaves are alternate, pinnately compound, absent of a terminal leaflet, with blades of 6-8 cms long and 4-8 leaflets (rarely as many of 20), usually recurved and asymmetric at the base.  The upper leaf surfaces are a lustrous green, while the underside is a more yellow-green or brown-green.  The flowers are uni sexual, 5-7 mm in diameter, 5 sepals, 5 petals and are orange-yellow or green-yellow in color.  Male and female flowers both appear on the the same tree, the male have long non functional pistils, the females short pistils, 10 stamens with filaments fused into a tube surrounding the pistil.  The fruit are a large egg shaped brown capsule that ranges in size from 6-13 cm long, each fruit splits into 5 parts that release numerous flat winged seeds.  Both the fruit and flowers occur/appear year round.  

Image Citation: By I, J.M.Garg, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2602298

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Sour Orange - Citrus x aurantium

   The Sour Orange - Citrus x aurantium is a small evergreen shrub or small tree that reaches heights of only 10-30 feet tall. The Sour Orange has been naturalized in Florida, Georgia and Texas, but originated in southeastern Asia and South Sea Islands (Fiji, Samoa, and Guam). Sour Orange is grown in orchards settings only in the Orient/various other parts of the world where its special products are of commercial importance, including southern Europe and some offshore islands of North Africa, the Middle East, Madras, India, West Tropical Africa, Haiti, the Dominican Republic, Brazil and Paraguay.

Image Citation:  NCSC Herbarium, Citrus ID, USDA APHIS ITP, Bugwood.org

The leaves of the Sour Orange are simply shaped ovate or elliptic, lustrous and deep green in color. The flowers are small, white in color and usually have 4 or 5 petals. The fruit is orange in color, round in shape with a thick almost leathery rind. Inside of the fruit is several separate sections or cells, each having at least a single seed. The fruit is fragrant, however it is generally too sour to be eaten on it's own. The primary use of Sour Orange is for the production of marmalade. The fruits are largely exported to England and Scotland for making marmalade.

Image Citation: NCSC Herbarium, Citrus ID, USDA APHIS ITP, Bugwood.org

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