Pinus greggii

Pinus greggii

Pinus greggii is a native plant species of the genus only in Mexico pines ( Pinus ). Its botanical name honors the American merchant and naturalist Josiah Gregg ( 1806-1850 ).

Features

Pinus greggii a medium sized tree, the plant height 10-25 meters is reached. The crown is irregularly roundish. The lower branches horizontal to the downside. In solitary growing trees the branches are often close to the ground, the crown is dense and bushy. The bark is in mature trees in the lower crown of thick, gray-brown and divided by deep, vertical cracks in scaly plates. On young trees the bark is gray-brown and smooth. Her crown is open and irregularly branched. The branches are slender, erect, smooth and gray -brown.

The needle leaves are in clusters on short shoots threes; the sheaths are pale gray-brown, 5-10 mm long, persistent, rarely deciduous. The leaves are needle thin to medium thick, erect, 10 to 15 inches long and light green. The margin is finely serrated. There are two to six resin canals present. There are two adjacent, but deferred vascular bundles.

The cones are available individually or in groups of three to six, even more, on slender stems. Your cone scales are wide and carry a narrow spike.

The cones are oblong- conical, yellow-brown, slightly curved. They are 10 to 14 inches long. They are in groups of three to six, or even eight, often clustered at a node. If the road is thicker, they are sometimes partially enclosed by wood. The cone scales are hard and stiff.

The seeds are small, 5-6 mm long, dark brown. The seed wing is about 15 millimeters long.

The wood is very resinous and pale - yellowish. It is taken locally for firewood, mining timber and lumber.

Dissemination and locations

Pinus greggii has a very limited distribution. It occurs in scattered populations in the mountains of the Sierra Madre Oriental in Mexico.

This species grows at altitudes 1300-3000 meters in front in areas with 600-900 mm annual rainfall, partly also from 1000 to 1500 mm. Frost comes in the higher regions in December and January regularly.

Documents

Jesse P. Perry: The Pines of Mexico and Central America. Timber Press, Portland, 1991, pp. 166ff. ISBN 0-88192-174-2