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Hartwig Locust Tree - Robinia hartwigii
Fabaceae: Pea & Bean Family
USDA Hardiness Zone: 3
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Hartwig Locust
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Leaf: alternate, pinnately or
bipinnately compound with 14 to 20 oval to
elliptical leaflets each 3/4 to 1 inch long,
overall leaf 6 to 8 inches long.
Flower: Greenish white flowers displayed in 2
inch long racemes, appearing after the leaves.
Fruit: Flat, brown, almost round pods, 1 to 2
inches long, each containing 1 to 3 seeds.
Twig: Slender to moderate, zigzag, grayish to
red-brown, conspicuous thorns, lateral buds
sunken.
Bark: Smooth, grayish brown, often mottled,
lenticels present, later splitting.
Form: Small to medium sized tree to 50 feet with
a spreading, open crown. |
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Leaves
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The Fabaceae are herbs,
vines, shrubs, trees, and lianas found in
both temperate and tropical areas. They
comprise one of the largest families of
flowering plants, numbering 630 genera and
18,000 species. The leaves are stipulate,
nearly always alternate, and range from
bipinnately or palmately compound to simple.
The petiole base is commonly enlarged into a
pulvinus that commonly functions in
orientation of the leaves (sometimes very
responsively, as in the sensitive plant,
Mimosa pudica). The flowers are usually
bisexual, actinomorphic to zygomorphic,
slightly to strongly perigynous, and
commonly in racemes, spikes, or heads. The
perianth commonly consists of a calyx and
corolla of 5 segments each. The androecium
consists of commonly 1- many stamens (most
commonly 10), distinct or variously united,
sometimes some of them reduced to
staminodes. The pistil is simple, often
stipitate, comprising a single style and
stigma, and a superior ovary with one locule
containing 2-many marginal ovules. The fruit
is usually a legume, sometimes a samara,
loment, follicle, indehiscent pod, achene,
drupe, or berry. The seeds often have a hard
coat with hourglass-shaped cells, and
sometimes bear a u-shaped line called a
pleurogram.
The native thorny locust species is found on
both sides of the Mississippi
River from Nebraska to Texas and from
Pennsylvania to Alabama. Fence rows and
pastures are common locations. |
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Hartwig Locust Bark
Being a member of the bean family, the Hartwig Locust is
related to the
Kentucky Coffee Tree
and the vine
Wisteria, among others.
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Healthy, attractive trees
add interest, pleasure, and value to
landscapes. Some factors to keep in mind as
you select a tree relate to your projected
planting site and some factors relate to
you. Healthy plants, growing under
conditions that suit them, are marvelously
engineered to deal with minor incidence of
heat, cold, drought, storm damage, pests,
and disease. Sometimes we unknowingly stress
them, reducing their ability to stay
healthy.
Trees provide cover: Birds and small animals need concealed places for nesting and hiding from predators. The presence of wildlife can make your backyard or woodlot a special place for your family and children. As urban sprawl displaces many birds and animals from their natural habitat, it becomes even more important for home and landowners to provide green space and mini-sanctuaries for birds and other wildlife.
Trees provide food: Having a wide variety of
trees that provide seeds, nuts and fruit for
wildlife to eat is one way to increase your
success in attracting wildlife. although
artificial bird feeders can supplement
naturally occurring foods, they can attract
unwanted pests such as pigeons, Canada
geese, squirrels, and even rats. Trees also
provide food by attracting insects and
providing cover for their activities;
mating, egg-laying. Insects form a huge
portion of the warm-weather food supply for
many species of songbirds.
And, most important in this age of man-made
global warming, trees sequester large
amounts of carbon dioxide.
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