Parry Pinyon

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Pinus quadrifolia, the Parry Pinyon, is a pine in the pinyon pine group, native to southernmost California in the United States and northern Baja California in Mexico, from 33° 30' N south to 30° 30' N. It occurs at moderate altitudes from to , rarely as low as and as high as . It is scarce and often scattered in this region, forming open woodlands, usually mixed with junipers.


Pinus quadrifolia is a small to medium size tree, reaching to tall and with a trunk diameter of up to , rarely more. The bark is thick, rough and scaly. The leaves ('needles') are in fascicles of 4–5, moderately stout, - long; glossy dark green with no stomata on the outer face, and a dense bright white band of stomata on the inner surfaces. The cones are globose, - long and broad when closed, green at first, ripening yellow to orange-buff when 18–20 months old, with only a small number of thick scales, with typically 5–10 fertile scales.

The cone open to to broad when mature, holding the seeds on the scales after opening. The seeds are - long, with a thin shell, a white endosperm, and a vestigial - wing; they are dispersed by the Pinyon Jay, which plucks the seeds out of the open cones. The jay, which uses the seeds as a food resource, stores many of the seeds for later use, and some of these stored seeds are not used and are able to grow into new trees.


Pinus quadrifolia frequently hybridises with......
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