1
| 1
Pinus quadrifolia
- Tree
San Pedro Martir, altitude : 4,500 feet.
The trees at the lowest elevations, such as this one, all have needles
predominantly in groups of 4. At higher elevations the trees mainly have
groups of 5. The cones where larger at higher elevations, probably due to
higher rainfall.
Baja California, Mexico
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2
| 2
Pinus quadrifolia
- Tree
On the plains just south of the Sierra Juarez, near Santa Catarina.
Altitude : about 3,800 feet.
Baja California, Mexico
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3
| 3
Pinus quadrifolia
- Trunk
West side of Sierra San Pedro Martir.
Older trees usually have a clear
trunk free of branches, something you rarely see in Pinus monophylla which
usually has branches to the ground. This tree has needles mostly in groups
of 5. Another tree near by has needles predominantly in groups of 3.
Most of the lowest elevation trees have needles in 4's. Other than needle
count, no difference was noticed.
Baja California, Mexico
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4
| 4
Pinus quadrifolia
- Trees
On west side of Sierra San Pedro Martir at about 6,000 feet elevation.
Baja California, Mexico
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5
| 5
Pinus quadrifolia & Pinus monophylla californiarum
- Trees
Left : Pinus quadrifolia;
Right : Pinus monophylla californianum.
We found these two species growing side by side on the plains just south of
the Sierra Juarez, near Santa Catarina. Pinus monophylla is a little lighter
green, and its branches are ascending. The cones of the two species were
very similar. Although they occasionally grew side by side, Pinus monophylla
prefered slightly dryer sites.
Baja California, Mexico
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6
| 6
Pinus quadrifolia
- Cone
Sierra San Pedro Martir.
Baja California, Mexico
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7
| 7
Pinus quadrifolia
- Cones
Sierra San Pedro Martir.
Baja California, Mexico
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