Wednesday, March 16, 2022

Tamarind - Tamarindus indica

  The Tamarind - Tamarindus indica, is most easily identified by the combination of pinnate leaves, blackened trunk areas, zig zag limbs and variable sized and colored fruit.  The Tamarind is primarily an evergreen or semi deciduous tree that can reach heights of 65-100 feet or more.  The diameter in the United States tends to only reach 5 feet while in it's native range it has been reported as large in diameter as 25 feet.  It was introduced originally from tropical portions of Africa and India and has escaped cultivation and has established itself in Southern Florida.  


Image Citation: Chua Cheng Hong, Bugwood.org

The leaf of the Tamarind is alternate, pinnate and 7.5-15 cm long.  The leaflets are in 10-20 pairs even in numbers, oblong and oblique at the base and squared at the apex.  The upper leaf surface is dark green or yellow green in color.  The flowers are bisexual about 2.5 cm in diameter, 4 sepals, 3 petals yellow in color with pinkish streaks and crinkled margins appearing in Spring to early Summer.  


Image Citation: Howard F. Schwartz, Colorado State University, Bugwood.org

A similar species the Wild Tamarind - Lysiloma latisiliquum, also has zig zag twigs and is similar in stature, however it's bark is a paler white-gray in color and it's plat, twisted pods do not vary in size. 

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Wednesday, March 2, 2022

Quaking Aspen - Populus tremuloides

  The Quaking Aspen - Populus tremuloides - is also called the Trembling Aspen, Golden Aspen or Mountain Aspen. With the smallest of breezes the leaves will flutter hence it's name. When fluttering the leaves even making an audible sound which would explain why the Onondagas called it the "nut-kie-e" which means noisy leaf. This tree has a very remarkable native range covering a majority of the Northern portion of the continent, ranging from New Foundland South to Delaware in the East and along the Coast of Alaska and British Columbia running South through the Rocky Mountains. Although it is not found in the South it does have one of the widest distributions of any tree in North America. It can be grown throughout hardiness zones 1-7. It is often times one of the first trees to appear after a Forest Fire. It is a fast grower often gaining 24 inches in a single season. Aspen wood Is used to make a variety of items such as wooden toys, tongue depressors, popsicle sticks, clothes pins, crates and even for paper pulp.





Image Citation (Stand): Dave Powell, USDA Forest Service (retired), Bugwood.org

The leaves are rounded triangles with small teeth along the margins. The leaves are a glossy green above and dull below, during the Spring they change to a vivid Yellow or very rarely Red. They are arrranged alternately on the branches. Catkins are long and silvery and appear between April and May. In the late Spring, it's tiny seeds which are enclosed in cottony tufts are dispersed by the wind. The bark is a Greenish-White to Grey in color, it is often marked with black knots or horizontal scars.



Image Citation (Fall Foliage): Howard F. Schwartz, Colorado State University, Bugwood.org

The Aspen is a favorited food and shelter source for many different type of wildlife. The leaves and bark are eaten by Deer, Elk and Hare/Rabbits. The Buds are an important food source for Grouse during Winter. Beavers not only feed from the Aspen, they also use it's lumber as a building material. Many different birds and butterflies make their homes in these stands.


The Aspen holds the the title of largest living organisms on Earth, growing in clones/stand that reproduce primarily by sending up sprouts from their roots. For the most part each clone within a stand is connected to the next one through it's root system. One clone/stand in Utah (where it is the State tree) has been determined to have over 47,000 stems, this stand is estimated to weigh over 6,000 tons! While individually each stem lives 100-150 years, Aspen stands are one of the longest living organisms. One clone in Minnesota is estimated to be 8,000 years old, making it one of the longest living organism on Earth.

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Tuesday, March 1, 2022

Horse Chestnut - Aesculus hippocastanum

  The Horse Chestnut - Aesculus hippocastanum, is only native to a very small area of Mountains between Greece and Albania- it was not discovered/recorded until 1596.  Once discovered it was rapidly planted and spread almost all over Europe in the early 1600's, then later by the early colonists of North America.  It is a very common street tree from Ontario to Virginia.  In the West it's spread ranges from British Columbia down through New Mexico, Utah and Colorado.  It is one of the more common street trees in the United States and has naturalized in most regions. Growing to heights of 50-75 feet at maturity, this tree can live upwards of 300 years so when planted correctly it can be considered a permanent addition to most landscapes.  It is recommended to be planted in hardiness zones 4-7

The name Horse Chestnut was thought to gain it's origin from the false belief that this tree was part of the Chestnut family, combined with the fact that despite the fruits being poisonous to horses they actually cured some chest related ailments when eaten by sick horses.  





Image Citations (Photos 1 & 2):Norbert Frank, University of West Hungary, Bugwood.org

Although the Horse Chestnut is sometimes confused with the closley related American Buckeye, that name is generally reserved for the North American members of the Aesculus genus.  The Horse Chestnut differs from the American Buckeyes because of it's shiny orange-brown terminal buds, bigger leaves on stalkless leaflets, 1 foot tall heads with predominently white flowers and very prickly husks that enclose the mahogany colored seeds.  Each individual flower opens to reveal a bright splash of yellow at the base of every petal, once pollinated this yellow turns a deeper orange and then finally a crimson red.




Image Citations (Photos 3 & 4) :Paul Wray, Iowa State University, Bugwood.org

The flowers provide a rich source of nectar and pollen to insects, especially bees. Caterpillars of the triangle moth and horse chestnut leaf miner moth feed on the leaves. Deer and other mammals eat the conkers.  The most famous use of Horse Chestnut is in the game of conkers. The first record of the game is from the Isle of Wight in 1848.
The wood of the Horse Chestnut is soft and often considered weak.  It has a very straight light colored grain and is often used for wood turning, artificial limb production and wooden toy making.  This weakness can be considered a liability as mature trees in full leaf have been known to drop large branches without warning during heavy storms. 



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