Common Trees of S.Eastern Pennsylvania.
Common Trees of S. Eastern
"Pennsylvania" (Latin for "Penn's Woods"). Pennsylvania's location spanning 40 degrees - 42 degrees north latitude and its varied terrain support 108 species of native trees and many other introduced from Europe and Asia. Trees provide a renewable source of lumber, paper, nuts and chemicals. But they are also essential as living filters, removing pollution from the air we breath and the water we drink. Trees provide homes and food for wildlife, and beautify our homes with comforting shade in summer and shelter from winter winds. With wise management, forests can produce these benefits for future generations as they have in the past.
If you cut a tree down, please replace it.....
Towards the middle of the page is the index to the photos...Not all pictures have been up-loaded..but will be soon. Keep checking back.
Leaves: A chemical compound in leaves called chlorophyll strongly absorbs radiation in the red and blue wavelengths but reflects green wavelengths. Leaves appear "greenest" to us in the summer, when chlorophyll content is at its maximum. In autumn, there is less chlorophyll in the leaves, so there is less absorption and proportionately more reflection of the red wavelengths, making the leaves appear red or yellow (yellow is a combination of red and green wavelengths). The internal structure of healthy leaves act as excellent diffuse reflectors of near-infrared wavelengths. If our eyes were sensitive to near-infrared, trees would appear extremely bright to us at these wavelengths. In fact, measuring and monitoring the near-IR reflectance is one way that scientists can determine how healthy (or unhealthy) vegetation may be.
Water: Longer wavelength visible and near infrared radiation is absorbed more by water than shorter visible wavelengths. Thus water typically looks blue or blue-green due to stronger reflectance at these shorter wavelengths, and darker if viewed at red or near infrared wavelengths. If there is suspended sediment present in the upper layers of the water body, then this will allow better reflectivity and a brighter appearance of the water. The apparent colour of the water will show a slight shift to longer wavelengths. Suspended sediment (S) can be easily confused with shallow (but clear) water, since these two phenomena appear very similar. Chlorophyll in algae absorbs more of the blue wavelengths and reflects the green, making the water appear more green in colour when algae is present. The topography of the water surface (rough, smooth, floating materials, etc.) can also lead to complications for water-related interpretation due to potential problems of specular reflection and other influences on colour and brightness.
Wide and Flat:
Alternate Arrangement Wide and Flat:
Opposite Arrangement Needle-shaped or Linear
eb.utk.edu/~grissino/trees.htm -trees on the web
http://www.oplin.org/tree-What tree is it?
National Geographic Coloring Book Monarch Butterfly Picture.
Can anyone tell me what this is?
Discription: Butterfly-like bee or related to the hummingbird? e-mail me at email@example.com
"A Field Guide to Trees of North America"
By: C.Frank Brockman
"An Instant Guide to Trees"
By: Lawrence and Fitzsimons
By: Zim and Martin
"Field Book Of American Wild Flowers"
By: F.Schuyler Mathews
Pictures and Information can be found in the Photos section.
TREES AND LEAVES:
Northern Red Oak
Tree Of Heaven
Tamarack/European Larch on the school papers, but the name is American Larch
Eastern White Pine
Osage Orange (Monkey Ball Tree)
PINES AND NEEDLES:
Eastern White Pine
Tamarack (European Larch)
Today in History!
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