major plant communities of saguaro (continued)
The Desert Scrub Community occupies the
lower parts of the monument, from about 2,200 to 4,000 feet.
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The Grassland Transition begins at about 3,500 feet
(overlapping in altitude with the Desert Scrub) and extends to 4,500 feet.
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The Open Oak Woodland has scattered trees associated with many
plants of the Grassland Transition.
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The Oak-Pine Woodland, from 4,500 to 7,000 feet, occupying a
slightly cooler, wetter environment than those below, is broken by open
glades and grassy hillsides.
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The Ponderosa Pine Forest, unlike the Oak-Pine "pygmy woodland,"
has tall trees growing in clear, open stands. It covers much of the
Rincon Mountains above 6,000 feet.
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The Douglas-fir Forest, limited to the higher
northern and northeastern slopes of Mica Mountain and the north side of
Rincon Peak, often contains aspens and white firs.
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