Saturday, January 11, 2025

Swamp Tupelo - sylvatica var. biflora (AKA Swamp Blackgum)

     The Swamp Tupelo - sylvatica var. biflora (AKA Swamp Blackgum), is most often found as a small tree but can reach heights of over 80 feet tall.  The Swamp Tupelo is filled with small branches that grow in almost perfect right angles from the trunk forming an open but unkempt crown.  Mature trees often develop swelling near the base of their trunks.  Bees are often found around Swamp Tupelo as they gather the flower pollen to produce Tupelo Honey which is highly prized.   Their sour fruits are grazed upon by a variety of small mammals and birds.  The soft wood is not commercially important but is sometimes used in local applications where a rot resistant wood is required.  Swamp Tupelo prefers to grow in shallow moving water or swamp lands, and can be found from Maryland in the North through Florida in the South and west through eastern Texas and North along the Mississippi River to Illinois.  



Image Citation: Chris Evans, University of Illinois, Bugwood.org

The leaves of the Swamp Tupelo are alternate, thick and textured with short leaf stalks.  The leaf blade is 1.5 to 4 inches long and .5 to 1.5 inches wide.  The upper leaf surface is lustrous and green in color, the lower is pale and covered in hairs.  The fruit is purple-black in color, sour in flavor, 1/4-1/2 inch long with a hard seed that has distinct ridges.  The bark is silver-gray in color occasionally almost black in color with rough rectangular chunky plates and crooked furrows. 


Image Citation: Chris Evans, University of Illinois, Bugwood.org

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Friday, January 10, 2025

Black Jack Oak - Quercus marilandica

    The Black Jack Oak - Quercus marilandica, is a small to mid sized deciduous tree that reaches heights of only 15 - 45 feet tall.  Black Jack Oak often grows in an irregular shape with an open crown and crooked branches.  It is one of the fews Red Oaks that produce and store a substance called tyloses, this substance seals the vessels and make the wood watertight.  The small trees lumber is not highly valuable because of it's small size and knotty qualities it is used for fence posts, wooden water buckets, railroad ties, firewood and charcoal.  Black Jack Oak is native to dry, sandy or soils from Iowa in the West, New Jersey and New York in the North, South through Florida, West through Texas and Northern Nebraska.  



Image Citation: David Stephens, Bugwood.org

The leaves of the Black Jack Oak are tough and leathery, triangular and 4-8 inches long and wide.  The leaf stalk or petiole and lower surface are covered with dense brown-orange hairs.  The veins are raised on both the upper and lower leaf surfaces.  Acorns occur singularly or in pairs on a short stalk with red-brown top shaped cups with hairy scales.  The nuts are elliptic, 1/2 to 3/4 of an inch each, with a stout point.



Image Citation:  Vern Wilkins, Indiana University, Bugwood.org

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